./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s1iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s1iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0 --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 1db85e7c0edb4fd41a35742a3318c79833e1ee4b0f0abb2fb59241212e3e7429 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 15:39:14,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 15:39:14,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 15:39:14,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 15:39:14,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 15:39:14,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 15:39:15,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 15:39:15,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 15:39:15,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 15:39:15,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 15:39:15,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 15:39:15,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 15:39:15,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 15:39:15,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 15:39:15,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 15:39:15,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 15:39:15,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 15:39:15,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 15:39:15,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 15:39:15,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 15:39:15,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 15:39:15,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 15:39:15,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 15:39:15,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 15:39:15,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 15:39:15,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 15:39:15,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 15:39:15,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 15:39:15,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 15:39:15,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 15:39:15,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 15:39:15,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 15:39:15,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 15:39:15,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 15:39:15,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 15:39:15,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 15:39:15,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 15:39:15,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 15:39:15,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 15:39:15,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 15:39:15,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 15:39:15,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 15:39:15,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 15:39:15,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 15:39:15,151 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 15:39:15,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 15:39:15,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 15:39:15,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 15:39:15,161 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 15:39:15,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 15:39:15,162 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 15:39:15,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 15:39:15,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 15:39:15,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 15:39:15,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 15:39:15,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 15:39:15,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 15:39:15,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 15:39:15,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 15:39:15,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 15:39:15,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 15:39:15,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 15:39:15,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 15:39:15,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 15:39:15,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:39:15,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 15:39:15,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 15:39:15,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 15:39:15,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 15:39:15,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 15:39:15,169 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 15:39:15,172 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 15:39:15,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 15:39:15,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 15:39:15,173 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_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db85e7c0edb4fd41a35742a3318c79833e1ee4b0f0abb2fb59241212e3e7429 [2021-11-22 15:39:15,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 15:39:15,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 15:39:15,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 15:39:15,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 15:39:15,531 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 15:39:15,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-fpi/s1iff.c [2021-11-22 15:39:15,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/data/620ab441b/0eecd567de5c435093cb472f8eb61148/FLAG248b17a4a [2021-11-22 15:39:16,226 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 15:39:16,227 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/sv-benchmarks/c/array-fpi/s1iff.c [2021-11-22 15:39:16,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/data/620ab441b/0eecd567de5c435093cb472f8eb61148/FLAG248b17a4a [2021-11-22 15:39:16,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/data/620ab441b/0eecd567de5c435093cb472f8eb61148 [2021-11-22 15:39:16,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 15:39:16,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 15:39:16,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 15:39:16,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 15:39:16,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 15:39:16,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:16,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749b529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16, skipping insertion in model container [2021-11-22 15:39:16,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:16,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 15:39:16,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 15:39:16,854 WARN L230 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_88b47a32-361a-431c-9a1e-b9261bffe79d/sv-benchmarks/c/array-fpi/s1iff.c[588,601] [2021-11-22 15:39:16,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:39:16,901 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 15:39:16,913 WARN L230 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_88b47a32-361a-431c-9a1e-b9261bffe79d/sv-benchmarks/c/array-fpi/s1iff.c[588,601] [2021-11-22 15:39:16,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 15:39:16,939 INFO L208 MainTranslator]: Completed translation [2021-11-22 15:39:16,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16 WrapperNode [2021-11-22 15:39:16,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 15:39:16,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 15:39:16,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 15:39:16,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 15:39:16,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:16,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:16,985 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-11-22 15:39:16,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 15:39:16,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 15:39:16,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 15:39:16,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 15:39:17,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:17,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:17,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:17,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:17,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:17,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:17,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:17,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 15:39:17,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 15:39:17,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 15:39:17,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 15:39:17,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (1/1) ... [2021-11-22 15:39:17,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 15:39:17,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:39:17,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 15:39:17,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 15:39:17,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 15:39:17,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 15:39:17,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 15:39:17,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 15:39:17,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 15:39:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 15:39:17,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 15:39:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 15:39:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 15:39:17,304 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 15:39:17,307 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 15:39:17,530 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 15:39:17,557 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 15:39:17,557 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 15:39:17,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:39:17 BoogieIcfgContainer [2021-11-22 15:39:17,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 15:39:17,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 15:39:17,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 15:39:17,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 15:39:17,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 03:39:16" (1/3) ... [2021-11-22 15:39:17,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eddd2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:39:17, skipping insertion in model container [2021-11-22 15:39:17,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 03:39:16" (2/3) ... [2021-11-22 15:39:17,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eddd2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 03:39:17, skipping insertion in model container [2021-11-22 15:39:17,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:39:17" (3/3) ... [2021-11-22 15:39:17,585 INFO L111 eAbstractionObserver]: Analyzing ICFG s1iff.c [2021-11-22 15:39:17,592 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 15:39:17,592 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 15:39:17,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 15:39:17,679 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, mAutomataTypeConcurrency=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 [2021-11-22 15:39:17,680 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 15:39:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-11-22 15:39:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:39:17,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:39:17,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:39:17,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:39:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:39:17,755 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-11-22 15:39:17,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:39:17,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702041211] [2021-11-22 15:39:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:17,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:39:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:39:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:18,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:39:18,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702041211] [2021-11-22 15:39:18,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702041211] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:39:18,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:39:18,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 15:39:18,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111185929] [2021-11-22 15:39:18,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:39:18,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 15:39:18,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:39:18,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 15:39:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 15:39:18,069 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-22 15:39:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:39:18,092 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-11-22 15:39:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 15:39:18,095 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) Word has length 11 [2021-11-22 15:39:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:39:18,106 INFO L225 Difference]: With dead ends: 34 [2021-11-22 15:39:18,106 INFO L226 Difference]: Without dead ends: 15 [2021-11-22 15:39:18,110 INFO L932 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 [2021-11-22 15:39:18,117 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:39:18,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 15:39:18,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-22 15:39:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-22 15:39:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-11-22 15:39:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-22 15:39:18,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-22 15:39:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:39:18,169 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-22 15:39:18,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-11-22 15:39:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-22 15:39:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 15:39:18,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:39:18,173 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:39:18,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 15:39:18,174 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:39:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:39:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-11-22 15:39:18,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:39:18,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630608633] [2021-11-22 15:39:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:18,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:39:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:39:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:18,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:39:18,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630608633] [2021-11-22 15:39:18,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630608633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 15:39:18,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 15:39:18,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 15:39:18,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131523510] [2021-11-22 15:39:18,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 15:39:18,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 15:39:18,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:39:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 15:39:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:39:18,325 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-22 15:39:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:39:18,427 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-22 15:39:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 15:39:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) Word has length 11 [2021-11-22 15:39:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:39:18,430 INFO L225 Difference]: With dead ends: 28 [2021-11-22 15:39:18,431 INFO L226 Difference]: Without dead ends: 20 [2021-11-22 15:39:18,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 15:39:18,434 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:39:18,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:39:18,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-22 15:39:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-22 15:39:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-11-22 15:39:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-22 15:39:18,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-11-22 15:39:18,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:39:18,443 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-22 15:39:18,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-22 15:39:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-22 15:39:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 15:39:18,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:39:18,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:39:18,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 15:39:18,446 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:39:18,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:39:18,447 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-11-22 15:39:18,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:39:18,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641825] [2021-11-22 15:39:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:18,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:39:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:39:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:18,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:39:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641825] [2021-11-22 15:39:18,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:39:18,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022313464] [2021-11-22 15:39:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:18,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:39:18,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:39:19,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 15:39:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:39:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 15:39:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:39:19,187 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 [2021-11-22 15:39:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-22 15:39:19,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-22 15:39:19,693 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-11-22 15:39:19,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 53 [2021-11-22 15:39:20,233 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-22 15:39:20,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 48 [2021-11-22 15:39:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:20,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:39:24,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 15:39:24,098 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2021-11-22 15:39:24,139 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 15:39:24,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 82 [2021-11-22 15:39:24,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 133 treesize of output 115 [2021-11-22 15:39:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:24,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022313464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:39:24,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:39:24,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-22 15:39:24,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140794395] [2021-11-22 15:39:24,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:39:24,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 15:39:24,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:39:24,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 15:39:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=365, Unknown=2, NotChecked=0, Total=462 [2021-11-22 15:39:24,211 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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) [2021-11-22 15:39:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:39:24,301 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-22 15:39:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 15:39:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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) Word has length 16 [2021-11-22 15:39:24,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:39:24,303 INFO L225 Difference]: With dead ends: 28 [2021-11-22 15:39:24,303 INFO L226 Difference]: Without dead ends: 24 [2021-11-22 15:39:24,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=106, Invalid=398, Unknown=2, NotChecked=0, Total=506 [2021-11-22 15:39:24,306 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 15:39:24,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 44 Unchecked, 0.0s Time] [2021-11-22 15:39:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-22 15:39:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-22 15:39:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-11-22 15:39:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-22 15:39:24,314 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-11-22 15:39:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:39:24,314 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-22 15:39:24,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 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) [2021-11-22 15:39:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-22 15:39:24,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 15:39:24,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:39:24,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:39:24,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 15:39:24,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:24,539 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:39:24,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:39:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2021-11-22 15:39:24,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:39:24,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390013966] [2021-11-22 15:39:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:24,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:39:24,576 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 15:39:24,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030403628] [2021-11-22 15:39:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:24,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:24,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:39:24,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:39:24,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 15:39:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:39:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 15:39:24,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:39:24,689 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 [2021-11-22 15:39:24,738 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 [2021-11-22 15:39:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:24,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:39:24,803 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 14 treesize of output 12 [2021-11-22 15:39:24,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 22 treesize of output 20 [2021-11-22 15:39:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:24,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:39:24,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390013966] [2021-11-22 15:39:24,830 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 15:39:24,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030403628] [2021-11-22 15:39:24,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030403628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:39:24,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 15:39:24,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-22 15:39:24,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478444549] [2021-11-22 15:39:24,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 15:39:24,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 15:39:24,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:39:24,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 15:39:24,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-22 15:39:24,835 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-11-22 15:39:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:39:24,928 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-11-22 15:39:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 15:39:24,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) Word has length 16 [2021-11-22 15:39:24,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:39:24,931 INFO L225 Difference]: With dead ends: 33 [2021-11-22 15:39:24,931 INFO L226 Difference]: Without dead ends: 26 [2021-11-22 15:39:24,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:39:24,937 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:39:24,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:39:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-22 15:39:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-22 15:39:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2021-11-22 15:39:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-22 15:39:24,955 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-11-22 15:39:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:39:24,959 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-22 15:39:24,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-11-22 15:39:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-22 15:39:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 15:39:24,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:39:24,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:39:25,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 15:39:25,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:25,187 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:39:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:39:25,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-11-22 15:39:25,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:39:25,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089918646] [2021-11-22 15:39:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:25,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:39:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:39:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:25,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:39:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089918646] [2021-11-22 15:39:25,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089918646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:39:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392159038] [2021-11-22 15:39:25,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 15:39:25,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:25,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:39:25,308 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:39:25,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 15:39:25,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 15:39:25,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:39:25,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:39:25,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:39:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:25,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:39:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:25,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392159038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:39:25,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:39:25,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-22 15:39:25,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595425088] [2021-11-22 15:39:25,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:39:25,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 15:39:25,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:39:25,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 15:39:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:39:25,538 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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) [2021-11-22 15:39:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:39:25,721 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-22 15:39:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:39:25,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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) Word has length 18 [2021-11-22 15:39:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:39:25,723 INFO L225 Difference]: With dead ends: 33 [2021-11-22 15:39:25,723 INFO L226 Difference]: Without dead ends: 29 [2021-11-22 15:39:25,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-22 15:39:25,725 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:39:25,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:39:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-22 15:39:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-11-22 15:39:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2021-11-22 15:39:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-22 15:39:25,731 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2021-11-22 15:39:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:39:25,731 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-22 15:39:25,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 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) [2021-11-22 15:39:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-22 15:39:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 15:39:25,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:39:25,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:39:25,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 15:39:25,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:25,945 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:39:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:39:25,946 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-11-22 15:39:25,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:39:25,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635778726] [2021-11-22 15:39:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:25,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:39:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 15:39:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:26,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 15:39:26,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635778726] [2021-11-22 15:39:26,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635778726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 15:39:26,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625651796] [2021-11-22 15:39:26,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 15:39:26,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:26,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 15:39:26,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 15:39:26,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 15:39:26,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 15:39:26,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 15:39:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 15:39:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 15:39:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:26,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 15:39:26,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 15:39:26,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625651796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 15:39:26,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 15:39:26,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-22 15:39:26,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098338965] [2021-11-22 15:39:26,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 15:39:26,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 15:39:26,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 15:39:26,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 15:39:26,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-22 15:39:26,244 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2021-11-22 15:39:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 15:39:26,354 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-22 15:39:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 15:39:26,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) Word has length 19 [2021-11-22 15:39:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 15:39:26,355 INFO L225 Difference]: With dead ends: 37 [2021-11-22 15:39:26,356 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 15:39:26,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-22 15:39:26,357 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 15:39:26,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 15:39:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 15:39:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-11-22 15:39:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-11-22 15:39:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-22 15:39:26,364 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-11-22 15:39:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 15:39:26,364 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-22 15:39:26,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2021-11-22 15:39:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-22 15:39:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 15:39:26,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 15:39:26,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 15:39:26,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 15:39:26,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 15:39:26,591 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 15:39:26,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 15:39:26,591 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-11-22 15:39:26,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 15:39:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309099447] [2021-11-22 15:39:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 15:39:26,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 15:39:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 15:39:26,646 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 15:39:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 15:39:26,716 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 15:39:26,716 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 15:39:26,717 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 15:39:26,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 15:39:26,724 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2021-11-22 15:39:26,728 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 15:39:26,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 03:39:26 BoogieIcfgContainer [2021-11-22 15:39:26,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 15:39:26,780 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 15:39:26,780 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 15:39:26,780 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 15:39:26,781 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 03:39:17" (3/4) ... [2021-11-22 15:39:26,783 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-22 15:39:26,837 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88b47a32-361a-431c-9a1e-b9261bffe79d/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 15:39:26,838 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 15:39:26,838 INFO L158 Benchmark]: Toolchain (without parser) took 10256.43ms. Allocated memory was 96.5MB in the beginning and 146.8MB in the end (delta: 50.3MB). Free memory was 61.3MB in the beginning and 91.0MB in the end (delta: -29.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-22 15:39:26,839 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 96.5MB. Free memory was 66.3MB in the beginning and 66.3MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:39:26,839 INFO L158 Benchmark]: CACSL2BoogieTranslator took 352.11ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 61.0MB in the beginning and 96.3MB in the end (delta: -35.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 15:39:26,840 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.04ms. Allocated memory is still 121.6MB. Free memory was 96.3MB in the beginning and 95.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 15:39:26,840 INFO L158 Benchmark]: Boogie Preprocessor took 67.76ms. Allocated memory is still 121.6MB. Free memory was 95.0MB in the beginning and 93.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 15:39:26,841 INFO L158 Benchmark]: RCFGBuilder took 499.34ms. Allocated memory is still 121.6MB. Free memory was 93.6MB in the beginning and 83.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 15:39:26,841 INFO L158 Benchmark]: TraceAbstraction took 9216.80ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 82.4MB in the beginning and 93.0MB in the end (delta: -10.6MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2021-11-22 15:39:26,842 INFO L158 Benchmark]: Witness Printer took 57.83ms. Allocated memory is still 146.8MB. Free memory was 93.0MB in the beginning and 91.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 15:39:26,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 96.5MB. Free memory was 66.3MB in the beginning and 66.3MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 352.11ms. Allocated memory was 96.5MB in the beginning and 121.6MB in the end (delta: 25.2MB). Free memory was 61.0MB in the beginning and 96.3MB in the end (delta: -35.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.04ms. Allocated memory is still 121.6MB. Free memory was 96.3MB in the beginning and 95.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 67.76ms. Allocated memory is still 121.6MB. Free memory was 95.0MB in the beginning and 93.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 499.34ms. Allocated memory is still 121.6MB. Free memory was 93.6MB in the beginning and 83.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9216.80ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 82.4MB in the beginning and 93.0MB in the end (delta: -10.6MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. * Witness Printer took 57.83ms. Allocated memory is still 146.8MB. Free memory was 93.0MB in the beginning and 91.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, N=2] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [a={-1:0}, i=0, N=2, sum={5:0}] [L32] COND TRUE i