./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN --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 3d0f32d2f39934bb8fd732fa206acfa5d2fb4cacaee37919c0e4326d55891c86 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:55:53,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:55:53,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:55:53,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:55:53,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:55:53,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:55:53,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:55:53,880 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:55:53,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:55:53,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:55:53,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:55:53,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:55:53,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:55:53,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:55:53,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:55:53,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:55:53,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:55:53,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:55:53,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:55:53,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:55:53,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:55:53,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:55:53,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:55:53,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:55:53,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:55:53,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:55:53,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:55:53,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:55:53,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:55:53,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:55:53,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:55:53,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:55:53,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:55:53,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:55:53,947 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:55:53,947 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:55:53,948 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:55:53,948 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:55:53,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:55:53,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:55:53,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:55:53,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:55:54,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:55:54,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:55:54,016 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:55:54,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:55:54,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:55:54,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:55:54,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:55:54,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:55:54,019 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:55:54,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:55:54,020 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:55:54,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:55:54,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:55:54,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:55:54,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:55:54,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:55:54,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:55:54,022 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:55:54,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:55:54,022 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:55:54,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:55:54,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:55:54,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:55:54,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:55:54,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:55:54,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:55:54,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:55:54,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:55:54,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:55:54,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:55:54,026 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:55:54,026 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:55:54,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:55:54,027 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_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0f32d2f39934bb8fd732fa206acfa5d2fb4cacaee37919c0e4326d55891c86 [2022-11-20 11:55:54,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:55:54,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:55:54,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:55:54,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:55:54,367 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:55:54,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loop-simple/nested_5.c [2022-11-20 11:55:57,526 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:55:57,710 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:55:57,711 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/sv-benchmarks/c/loop-simple/nested_5.c [2022-11-20 11:55:57,718 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/data/5644744a2/5e4bf78677114404b7f3f6f161b3d0fb/FLAG10861698a [2022-11-20 11:55:57,734 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/data/5644744a2/5e4bf78677114404b7f3f6f161b3d0fb [2022-11-20 11:55:57,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:55:57,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:55:57,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:55:57,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:55:57,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:55:57,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:57,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f77fffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57, skipping insertion in model container [2022-11-20 11:55:57,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:57,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:55:57,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:55:57,953 WARN L237 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_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/sv-benchmarks/c/loop-simple/nested_5.c[899,912] [2022-11-20 11:55:57,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:55:57,969 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:55:57,982 WARN L237 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_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/sv-benchmarks/c/loop-simple/nested_5.c[899,912] [2022-11-20 11:55:57,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:55:57,997 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:55:57,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57 WrapperNode [2022-11-20 11:55:57,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:55:57,999 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:55:57,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:55:57,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:55:58,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,033 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2022-11-20 11:55:58,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:55:58,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:55:58,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:55:58,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:55:58,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,053 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:55:58,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:55:58,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:55:58,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:55:58,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (1/1) ... [2022-11-20 11:55:58,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:55:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:58,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:55:58,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:55:58,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:55:58,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:55:58,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:55:58,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:55:58,218 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:55:58,221 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:55:58,365 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:55:58,372 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:55:58,373 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 11:55:58,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:55:58 BoogieIcfgContainer [2022-11-20 11:55:58,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:55:58,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:55:58,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:55:58,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:55:58,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:55:57" (1/3) ... [2022-11-20 11:55:58,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68706a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:55:58, skipping insertion in model container [2022-11-20 11:55:58,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:55:57" (2/3) ... [2022-11-20 11:55:58,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68706a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:55:58, skipping insertion in model container [2022-11-20 11:55:58,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:55:58" (3/3) ... [2022-11-20 11:55:58,388 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_5.c [2022-11-20 11:55:58,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:55:58,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:55:58,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:55:58,526 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@64956fc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:55:58,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:55:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 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) [2022-11-20 11:55:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:55:58,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:58,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:55:58,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash 28698534, now seen corresponding path program 1 times [2022-11-20 11:55:58,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:58,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2416291] [2022-11-20 11:55:58,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:58,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:58,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:58,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2416291] [2022-11-20 11:55:58,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2416291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:58,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:58,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:58,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585561295] [2022-11-20 11:55:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:58,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:58,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:58,832 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 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 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-20 11:55:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:58,896 INFO L93 Difference]: Finished difference Result 46 states and 76 transitions. [2022-11-20 11:55:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:58,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-20 11:55:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:58,908 INFO L225 Difference]: With dead ends: 46 [2022-11-20 11:55:58,909 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 11:55:58,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:58,915 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:58,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:55:58,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 11:55:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2022-11-20 11:55:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-11-20 11:55:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-20 11:55:58,954 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 5 [2022-11-20 11:55:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:58,954 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-20 11:55:58,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-20 11:55:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-20 11:55:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:55:58,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:58,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:58,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:55:58,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:58,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash 270418006, now seen corresponding path program 1 times [2022-11-20 11:55:58,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:58,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058907559] [2022-11-20 11:55:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:58,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058907559] [2022-11-20 11:55:59,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058907559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:59,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:59,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:59,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982185806] [2022-11-20 11:55:59,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:59,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:59,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:59,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:59,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:59,049 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-20 11:55:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:59,070 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-11-20 11:55:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:59,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-11-20 11:55:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:59,072 INFO L225 Difference]: With dead ends: 37 [2022-11-20 11:55:59,072 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 11:55:59,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:59,075 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:59,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:55:59,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 11:55:59,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 17. [2022-11-20 11:55:59,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2022-11-20 11:55:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-20 11:55:59,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2022-11-20 11:55:59,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:59,082 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-20 11:55:59,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-20 11:55:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-20 11:55:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:55:59,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:59,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:59,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:55:59,085 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1592253138, now seen corresponding path program 1 times [2022-11-20 11:55:59,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:59,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722426623] [2022-11-20 11:55:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:59,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:59,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:59,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722426623] [2022-11-20 11:55:59,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722426623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:59,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:59,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:59,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616316629] [2022-11-20 11:55:59,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:59,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:59,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:59,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:59,223 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-20 11:55:59,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:59,260 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-11-20 11:55:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2022-11-20 11:55:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:59,262 INFO L225 Difference]: With dead ends: 37 [2022-11-20 11:55:59,262 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 11:55:59,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:59,280 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:59,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:55:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 11:55:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-11-20 11:55:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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) [2022-11-20 11:55:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-20 11:55:59,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2022-11-20 11:55:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:59,288 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-20 11:55:59,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-20 11:55:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-20 11:55:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:55:59,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:59,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:59,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:55:59,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:59,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:59,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1010250086, now seen corresponding path program 1 times [2022-11-20 11:55:59,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:59,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499057965] [2022-11-20 11:55:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:59,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:59,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:59,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499057965] [2022-11-20 11:55:59,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499057965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:59,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:59,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:59,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837880856] [2022-11-20 11:55:59,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:59,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:59,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:59,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:59,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:59,414 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-20 11:55:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:59,435 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-11-20 11:55:59,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:59,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-11-20 11:55:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:59,437 INFO L225 Difference]: With dead ends: 37 [2022-11-20 11:55:59,437 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 11:55:59,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:59,440 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:59,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:55:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 11:55:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2022-11-20 11:55:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2022-11-20 11:55:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-20 11:55:59,448 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2022-11-20 11:55:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:59,449 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-20 11:55:59,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-20 11:55:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-20 11:55:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:55:59,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:59,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:59,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:55:59,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash 884246574, now seen corresponding path program 1 times [2022-11-20 11:55:59,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:59,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025601152] [2022-11-20 11:55:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:59,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:59,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:59,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025601152] [2022-11-20 11:55:59,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025601152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:59,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:59,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:55:59,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427321592] [2022-11-20 11:55:59,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:59,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:59,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:59,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:59,524 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-11-20 11:55:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:59,542 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-11-20 11:55:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:59,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Word has length 17 [2022-11-20 11:55:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:59,545 INFO L225 Difference]: With dead ends: 37 [2022-11-20 11:55:59,545 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 11:55:59,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:59,547 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:59,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:55:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 11:55:59,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-11-20 11:55:59,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2022-11-20 11:55:59,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-20 11:55:59,555 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 17 [2022-11-20 11:55:59,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:59,555 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-20 11:55:59,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-11-20 11:55:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-20 11:55:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:55:59,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:59,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:59,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:55:59,557 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:55:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash 291300972, now seen corresponding path program 1 times [2022-11-20 11:55:59,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:55:59,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157330891] [2022-11-20 11:55:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:59,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:55:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:59,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:55:59,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157330891] [2022-11-20 11:55:59,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157330891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:55:59,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991535170] [2022-11-20 11:55:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:59,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:55:59,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:55:59,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:55:59,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:55:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:59,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:55:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:59,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:59,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991535170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:59,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:55:59,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 11:55:59,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819340907] [2022-11-20 11:55:59,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:55:59,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:55:59,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:55:59,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:55:59,845 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-20 11:55:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:59,926 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-11-20 11:55:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:55:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) Word has length 19 [2022-11-20 11:55:59,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:59,928 INFO L225 Difference]: With dead ends: 43 [2022-11-20 11:55:59,928 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 11:55:59,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:55:59,934 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:59,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:55:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 11:55:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-20 11:55:59,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2022-11-20 11:55:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-20 11:55:59,948 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2022-11-20 11:55:59,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:59,949 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-20 11:55:59,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 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) [2022-11-20 11:55:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-20 11:55:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:55:59,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:59,951 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:55:59,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:00,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:00,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:00,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:00,155 INFO L85 PathProgramCache]: Analyzing trace with hash -163187674, now seen corresponding path program 2 times [2022-11-20 11:56:00,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:00,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852923079] [2022-11-20 11:56:00,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:00,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:56:00,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:00,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852923079] [2022-11-20 11:56:00,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852923079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:00,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443427676] [2022-11-20 11:56:00,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:56:00,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:00,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:00,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:00,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:56:00,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:56:00,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:00,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:56:00,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:00,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:00,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:56:00,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443427676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:00,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:00,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-11-20 11:56:00,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647750334] [2022-11-20 11:56:00,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:00,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:56:00,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:56:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:56:00,502 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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) [2022-11-20 11:56:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:00,748 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-11-20 11:56:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:56:00,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 25 [2022-11-20 11:56:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:00,750 INFO L225 Difference]: With dead ends: 82 [2022-11-20 11:56:00,751 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 11:56:00,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:56:00,758 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:00,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 51 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:56:00,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 11:56:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2022-11-20 11:56:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 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) [2022-11-20 11:56:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-11-20 11:56:00,788 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 25 [2022-11-20 11:56:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:00,789 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-11-20 11:56:00,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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) [2022-11-20 11:56:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-11-20 11:56:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:56:00,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:00,792 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:56:00,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 11:56:00,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:00,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1386680934, now seen corresponding path program 3 times [2022-11-20 11:56:01,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:01,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488145219] [2022-11-20 11:56:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:01,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-20 11:56:01,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488145219] [2022-11-20 11:56:01,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488145219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668771661] [2022-11-20 11:56:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:56:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:01,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:01,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:56:01,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:56:01,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:56:01,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-20 11:56:01,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-20 11:56:01,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668771661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:01,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:01,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-20 11:56:01,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995598773] [2022-11-20 11:56:01,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:01,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:56:01,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:56:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:56:01,469 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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) [2022-11-20 11:56:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:01,645 INFO L93 Difference]: Finished difference Result 464 states and 520 transitions. [2022-11-20 11:56:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:56:01,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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 44 [2022-11-20 11:56:01,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:01,648 INFO L225 Difference]: With dead ends: 464 [2022-11-20 11:56:01,648 INFO L226 Difference]: Without dead ends: 422 [2022-11-20 11:56:01,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:56:01,650 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 230 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:01,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 69 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:56:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-20 11:56:01,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 294. [2022-11-20 11:56:01,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.1126279863481228) internal successors, (326), 293 states have internal predecessors, (326), 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) [2022-11-20 11:56:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 326 transitions. [2022-11-20 11:56:01,702 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 326 transitions. Word has length 44 [2022-11-20 11:56:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:01,703 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 326 transitions. [2022-11-20 11:56:01,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 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) [2022-11-20 11:56:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 326 transitions. [2022-11-20 11:56:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-11-20 11:56:01,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:01,715 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 11:56:01,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:01,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:01,921 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1978019754, now seen corresponding path program 4 times [2022-11-20 11:56:01,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:01,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256986451] [2022-11-20 11:56:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 4294 proven. 1 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2022-11-20 11:56:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:02,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256986451] [2022-11-20 11:56:02,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256986451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:02,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59240536] [2022-11-20 11:56:02,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:56:02,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:02,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:02,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:02,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:56:02,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:56:02,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:02,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:56:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-11-20 11:56:02,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-11-20 11:56:02,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59240536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:02,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:02,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-11-20 11:56:02,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527423881] [2022-11-20 11:56:02,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:02,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:56:02,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:56:02,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:56:02,652 INFO L87 Difference]: Start difference. First operand 294 states and 326 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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) [2022-11-20 11:56:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:03,067 INFO L93 Difference]: Finished difference Result 2572 states and 2888 transitions. [2022-11-20 11:56:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:56:03,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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 293 [2022-11-20 11:56:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:03,106 INFO L225 Difference]: With dead ends: 2572 [2022-11-20 11:56:03,106 INFO L226 Difference]: Without dead ends: 2282 [2022-11-20 11:56:03,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:56:03,114 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:03,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 80 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:56:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2022-11-20 11:56:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1530. [2022-11-20 11:56:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 1.081752779594506) internal successors, (1654), 1529 states have internal predecessors, (1654), 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) [2022-11-20 11:56:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 1654 transitions. [2022-11-20 11:56:03,333 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 1654 transitions. Word has length 293 [2022-11-20 11:56:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:03,334 INFO L495 AbstractCegarLoop]: Abstraction has 1530 states and 1654 transitions. [2022-11-20 11:56:03,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 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) [2022-11-20 11:56:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 1654 transitions. [2022-11-20 11:56:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1530 [2022-11-20 11:56:03,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:03,416 INFO L195 NwaCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 11:56:03,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 11:56:03,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 11:56:03,623 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:03,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash 630309798, now seen corresponding path program 5 times [2022-11-20 11:56:03,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:03,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522728204] [2022-11-20 11:56:03,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 88166 proven. 3149 refuted. 0 times theorem prover too weak. 311023 trivial. 0 not checked. [2022-11-20 11:56:06,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522728204] [2022-11-20 11:56:06,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522728204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:06,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083158382] [2022-11-20 11:56:06,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:56:06,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:06,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:06,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:06,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:56:06,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-11-20 11:56:06,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:06,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:56:06,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-11-20 11:56:07,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-11-20 11:56:07,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083158382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:07,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:07,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 11:56:07,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625189373] [2022-11-20 11:56:07,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:07,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:56:07,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:07,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:56:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:07,797 INFO L87 Difference]: Start difference. First operand 1530 states and 1654 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 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) [2022-11-20 11:56:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:08,289 INFO L93 Difference]: Finished difference Result 5845 states and 6334 transitions. [2022-11-20 11:56:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:56:08,290 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 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 1529 [2022-11-20 11:56:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:08,309 INFO L225 Difference]: With dead ends: 5845 [2022-11-20 11:56:08,309 INFO L226 Difference]: Without dead ends: 4506 [2022-11-20 11:56:08,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3061 GetRequests, 3054 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:08,313 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:08,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 61 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:56:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2022-11-20 11:56:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 4506. [2022-11-20 11:56:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 1.0774694783573806) internal successors, (4854), 4505 states have internal predecessors, (4854), 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) [2022-11-20 11:56:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 4854 transitions. [2022-11-20 11:56:08,786 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 4854 transitions. Word has length 1529 [2022-11-20 11:56:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:08,788 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 4854 transitions. [2022-11-20 11:56:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 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) [2022-11-20 11:56:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 4854 transitions. [2022-11-20 11:56:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4506 [2022-11-20 11:56:09,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:09,096 INFO L195 NwaCegarLoop]: trace histogram [1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 11:56:09,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:09,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:56:09,304 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:09,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:09,306 INFO L85 PathProgramCache]: Analyzing trace with hash -837672026, now seen corresponding path program 6 times [2022-11-20 11:56:09,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:09,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259389277] [2022-11-20 11:56:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:09,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:56:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:56:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359703 proven. 113309 refuted. 0 times theorem prover too weak. 2150622 trivial. 0 not checked. [2022-11-20 11:56:22,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:56:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259389277] [2022-11-20 11:56:22,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259389277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:56:22,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203747166] [2022-11-20 11:56:22,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:56:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:56:22,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:56:22,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:56:22,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:56:30,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 753 check-sat command(s) [2022-11-20 11:56:30,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:56:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 5357 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:56:30,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:56:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-11-20 11:56:32,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:56:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-11-20 11:56:34,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203747166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:56:34,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:56:34,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 11:56:34,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522040137] [2022-11-20 11:56:34,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:56:34,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:56:34,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:56:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:56:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:34,997 INFO L87 Difference]: Start difference. First operand 4506 states and 4854 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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) [2022-11-20 11:56:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:56:36,062 INFO L93 Difference]: Finished difference Result 16862 states and 18175 transitions. [2022-11-20 11:56:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:56:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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 4505 [2022-11-20 11:56:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:56:36,114 INFO L225 Difference]: With dead ends: 16862 [2022-11-20 11:56:36,114 INFO L226 Difference]: Without dead ends: 13482 [2022-11-20 11:56:36,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9013 GetRequests, 9006 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:56:36,126 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:56:36,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 74 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:56:36,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13482 states. [2022-11-20 11:56:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13482 to 13482. [2022-11-20 11:56:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13482 states, 13481 states have (on average 1.0769230769230769) internal successors, (14518), 13481 states have internal predecessors, (14518), 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) [2022-11-20 11:56:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13482 states to 13482 states and 14518 transitions. [2022-11-20 11:56:37,310 INFO L78 Accepts]: Start accepts. Automaton has 13482 states and 14518 transitions. Word has length 4505 [2022-11-20 11:56:37,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:56:37,313 INFO L495 AbstractCegarLoop]: Abstraction has 13482 states and 14518 transitions. [2022-11-20 11:56:37,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 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) [2022-11-20 11:56:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 13482 states and 14518 transitions. [2022-11-20 11:56:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13482 [2022-11-20 11:56:38,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:56:38,885 INFO L195 NwaCegarLoop]: trace histogram [5184, 5184, 864, 864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-20 11:56:38,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:56:39,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e4be1d4-1b3c-4dc1-927c-44bc3393a41b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:56:39,086 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:56:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:56:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash 704779174, now seen corresponding path program 7 times [2022-11-20 11:56:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:56:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627038721] [2022-11-20 11:56:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:56:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:57:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat