./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8 --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 4f54335276b565c52e40eef6a3f78ed9d794347e65877e7f862e4de86bcdea73 --- 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-e04fb08 [2022-11-16 12:20:03,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:20:03,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:20:03,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:20:03,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:20:03,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:20:03,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:20:03,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:20:03,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:20:03,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:20:03,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:20:03,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:20:03,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:20:03,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:20:03,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:20:03,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:20:03,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:20:03,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:20:03,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:20:03,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:20:03,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:20:03,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:20:03,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:20:03,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:20:03,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:20:03,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:20:03,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:20:03,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:20:03,982 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:20:03,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:20:03,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:20:03,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:20:03,985 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:20:03,986 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:20:03,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:20:03,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:20:03,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:20:03,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:20:03,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:20:03,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:20:03,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:20:03,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:20:04,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:20:04,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:20:04,035 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:20:04,035 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:20:04,036 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:20:04,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:20:04,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:20:04,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:20:04,038 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:20:04,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:20:04,040 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:20:04,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:20:04,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:20:04,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:20:04,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:20:04,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:20:04,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:20:04,041 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:20:04,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:20:04,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:20:04,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:20:04,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:20:04,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:20:04,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:20:04,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:20:04,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:20:04,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:20:04,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:20:04,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:20:04,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:20:04,047 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:20:04,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:20:04,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:20:04,048 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_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f54335276b565c52e40eef6a3f78ed9d794347e65877e7f862e4de86bcdea73 [2022-11-16 12:20:04,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:20:04,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:20:04,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:20:04,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:20:04,403 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:20:04,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-1.i [2022-11-16 12:20:04,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/data/e3ec6b9a3/5f1ff757cf2949c5a603d650011f7372/FLAG444e6d102 [2022-11-16 12:20:05,306 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:20:05,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-1.i [2022-11-16 12:20:05,349 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/data/e3ec6b9a3/5f1ff757cf2949c5a603d650011f7372/FLAG444e6d102 [2022-11-16 12:20:05,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/data/e3ec6b9a3/5f1ff757cf2949c5a603d650011f7372 [2022-11-16 12:20:05,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:20:05,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:20:05,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:20:05,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:20:05,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:20:05,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:20:05" (1/1) ... [2022-11-16 12:20:05,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78326db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:05, skipping insertion in model container [2022-11-16 12:20:05,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:20:05" (1/1) ... [2022-11-16 12:20:05,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:20:05,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:20:06,231 WARN L229 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_f38df279-6416-43c7-b5ed-0f518420c50d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-1.i[33021,33034] [2022-11-16 12:20:06,577 WARN L229 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_f38df279-6416-43c7-b5ed-0f518420c50d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-1.i[84583,84596] [2022-11-16 12:20:06,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:20:06,600 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:20:06,653 WARN L229 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_f38df279-6416-43c7-b5ed-0f518420c50d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-1.i[33021,33034] [2022-11-16 12:20:06,775 WARN L229 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_f38df279-6416-43c7-b5ed-0f518420c50d/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test9-1.i[84583,84596] [2022-11-16 12:20:06,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:20:06,897 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:20:06,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06 WrapperNode [2022-11-16 12:20:06,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:20:06,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:20:06,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:20:06,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:20:06,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:06,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,157 INFO L138 Inliner]: procedures = 177, calls = 730, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2860 [2022-11-16 12:20:07,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:20:07,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:20:07,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:20:07,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:20:07,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,303 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:20:07,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:20:07,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:20:07,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:20:07,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (1/1) ... [2022-11-16 12:20:07,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:20:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:07,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:20:07,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:20:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:20:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:20:07,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:20:07,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:20:07,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-16 12:20:07,446 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-16 12:20:07,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:20:07,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:20:07,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:20:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:20:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-16 12:20:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:20:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:20:07,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:20:07,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:20:07,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:20:07,734 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:20:07,736 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:20:11,243 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:20:11,270 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:20:11,271 INFO L300 CfgBuilder]: Removed 54 assume(true) statements. [2022-11-16 12:20:11,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:20:11 BoogieIcfgContainer [2022-11-16 12:20:11,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:20:11,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:20:11,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:20:11,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:20:11,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:20:05" (1/3) ... [2022-11-16 12:20:11,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58932e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:20:11, skipping insertion in model container [2022-11-16 12:20:11,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:20:06" (2/3) ... [2022-11-16 12:20:11,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58932e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:20:11, skipping insertion in model container [2022-11-16 12:20:11,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:20:11" (3/3) ... [2022-11-16 12:20:11,293 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test9-1.i [2022-11-16 12:20:11,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:20:11,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 12:20:11,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:20:11,469 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;@6462ba59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:20:11,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 12:20:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 1165 states, 657 states have (on average 1.9238964992389649) internal successors, (1264), 1159 states have internal predecessors, (1264), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-16 12:20:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 12:20:11,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:11,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:11,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1311560150, now seen corresponding path program 1 times [2022-11-16 12:20:11,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:11,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552198764] [2022-11-16 12:20:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:11,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:11,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:11,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552198764] [2022-11-16 12:20:11,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552198764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:11,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:11,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:20:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098748059] [2022-11-16 12:20:11,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:11,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:20:11,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:11,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:20:11,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:20:11,781 INFO L87 Difference]: Start difference. First operand has 1165 states, 657 states have (on average 1.9238964992389649) internal successors, (1264), 1159 states have internal predecessors, (1264), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-16 12:20:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:11,994 INFO L93 Difference]: Finished difference Result 2328 states and 5038 transitions. [2022-11-16 12:20:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:20:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-11-16 12:20:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:12,063 INFO L225 Difference]: With dead ends: 2328 [2022-11-16 12:20:12,063 INFO L226 Difference]: Without dead ends: 1161 [2022-11-16 12:20:12,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:20:12,089 INFO L413 NwaCegarLoop]: 2210 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:12,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2210 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:20:12,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-11-16 12:20:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1161. [2022-11-16 12:20:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 654 states have (on average 1.834862385321101) internal successors, (1200), 1155 states have internal predecessors, (1200), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-16 12:20:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2206 transitions. [2022-11-16 12:20:12,689 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2206 transitions. Word has length 9 [2022-11-16 12:20:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:12,690 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 2206 transitions. [2022-11-16 12:20:12,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-16 12:20:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2206 transitions. [2022-11-16 12:20:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 12:20:12,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:12,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:12,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:20:12,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:12,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:12,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1831599231, now seen corresponding path program 1 times [2022-11-16 12:20:12,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:12,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418740759] [2022-11-16 12:20:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:12,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:13,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:13,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418740759] [2022-11-16 12:20:13,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418740759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:13,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:13,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:20:13,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392880097] [2022-11-16 12:20:13,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:13,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:20:13,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:13,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:20:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:20:13,336 INFO L87 Difference]: Start difference. First operand 1161 states and 2206 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-11-16 12:20:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:15,233 INFO L93 Difference]: Finished difference Result 3331 states and 6426 transitions. [2022-11-16 12:20:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:20:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 [2022-11-16 12:20:15,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:15,253 INFO L225 Difference]: With dead ends: 3331 [2022-11-16 12:20:15,254 INFO L226 Difference]: Without dead ends: 2262 [2022-11-16 12:20:15,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:20:15,262 INFO L413 NwaCegarLoop]: 2669 mSDtfsCounter, 1129 mSDsluCounter, 4306 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 6975 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:15,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 6975 Invalid, 643 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 12:20:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-11-16 12:20:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1163. [2022-11-16 12:20:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.8323170731707317) internal successors, (1202), 1157 states have internal predecessors, (1202), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-16 12:20:15,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2208 transitions. [2022-11-16 12:20:15,793 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2208 transitions. Word has length 44 [2022-11-16 12:20:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:15,793 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 2208 transitions. [2022-11-16 12:20:15,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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) [2022-11-16 12:20:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2208 transitions. [2022-11-16 12:20:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 12:20:15,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:15,798 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:20:15,799 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:15,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1300600525, now seen corresponding path program 1 times [2022-11-16 12:20:15,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:15,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831320173] [2022-11-16 12:20:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:16,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:16,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355368220] [2022-11-16 12:20:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:16,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:16,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:16,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:16,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:20:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:16,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:20:16,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:16,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:16,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:16,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831320173] [2022-11-16 12:20:16,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:16,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355368220] [2022-11-16 12:20:16,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355368220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:16,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:16,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:20:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594599087] [2022-11-16 12:20:16,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:20:16,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:20:16,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:20:16,978 INFO L87 Difference]: Start difference. First operand 1163 states and 2208 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-11-16 12:20:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:17,183 INFO L93 Difference]: Finished difference Result 2343 states and 4443 transitions. [2022-11-16 12:20:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:20:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-16 12:20:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:17,206 INFO L225 Difference]: With dead ends: 2343 [2022-11-16 12:20:17,206 INFO L226 Difference]: Without dead ends: 1184 [2022-11-16 12:20:17,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:20:17,227 INFO L413 NwaCegarLoop]: 2186 mSDtfsCounter, 9 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4357 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:17,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4357 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:20:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-11-16 12:20:17,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1183. [2022-11-16 12:20:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 676 states have (on average 1.8076923076923077) internal successors, (1222), 1177 states have internal predecessors, (1222), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-16 12:20:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2228 transitions. [2022-11-16 12:20:17,469 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2228 transitions. Word has length 96 [2022-11-16 12:20:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:17,470 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 2228 transitions. [2022-11-16 12:20:17,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-11-16 12:20:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2228 transitions. [2022-11-16 12:20:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 12:20:17,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:17,473 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:17,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:17,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:17,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:17,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:17,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1273534923, now seen corresponding path program 1 times [2022-11-16 12:20:17,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:17,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553379521] [2022-11-16 12:20:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:17,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:17,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265806408] [2022-11-16 12:20:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:17,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:17,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:17,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:17,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:20:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:18,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:20:18,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:20:18,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:18,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553379521] [2022-11-16 12:20:18,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265806408] [2022-11-16 12:20:18,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265806408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:18,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:18,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:20:18,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461468597] [2022-11-16 12:20:18,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:18,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:20:18,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:18,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:20:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:20:18,773 INFO L87 Difference]: Start difference. First operand 1183 states and 2228 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-11-16 12:20:18,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:18,937 INFO L93 Difference]: Finished difference Result 2272 states and 4345 transitions. [2022-11-16 12:20:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:20:18,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 96 [2022-11-16 12:20:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:18,947 INFO L225 Difference]: With dead ends: 2272 [2022-11-16 12:20:18,948 INFO L226 Difference]: Without dead ends: 1204 [2022-11-16 12:20:18,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:20:18,959 INFO L413 NwaCegarLoop]: 2186 mSDtfsCounter, 10 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4357 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:18,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4357 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:20:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-11-16 12:20:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1203. [2022-11-16 12:20:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 696 states have (on average 1.7844827586206897) internal successors, (1242), 1197 states have internal predecessors, (1242), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-16 12:20:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 2248 transitions. [2022-11-16 12:20:19,242 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 2248 transitions. Word has length 96 [2022-11-16 12:20:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:19,243 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 2248 transitions. [2022-11-16 12:20:19,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-11-16 12:20:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 2248 transitions. [2022-11-16 12:20:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 12:20:19,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:19,245 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:19,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:19,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:19,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash 992737231, now seen corresponding path program 1 times [2022-11-16 12:20:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532651108] [2022-11-16 12:20:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:19,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:19,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:19,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415358610] [2022-11-16 12:20:19,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:19,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:19,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:19,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:20:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:20,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:20:20,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:20,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:20,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532651108] [2022-11-16 12:20:20,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415358610] [2022-11-16 12:20:20,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415358610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:20,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:20,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:20:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461577401] [2022-11-16 12:20:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:20,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:20:20,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:20,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:20:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:20:20,785 INFO L87 Difference]: Start difference. First operand 1203 states and 2248 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2022-11-16 12:20:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:21,004 INFO L93 Difference]: Finished difference Result 2394 states and 4484 transitions. [2022-11-16 12:20:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:20:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2022-11-16 12:20:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:21,013 INFO L225 Difference]: With dead ends: 2394 [2022-11-16 12:20:21,014 INFO L226 Difference]: Without dead ends: 1195 [2022-11-16 12:20:21,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:20:21,023 INFO L413 NwaCegarLoop]: 2186 mSDtfsCounter, 1186 mSDsluCounter, 2694 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 4880 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:21,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1689 Valid, 4880 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:20:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-11-16 12:20:21,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1189. [2022-11-16 12:20:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 682 states have (on average 1.7903225806451613) internal successors, (1221), 1183 states have internal predecessors, (1221), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-16 12:20:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2227 transitions. [2022-11-16 12:20:21,251 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2227 transitions. Word has length 96 [2022-11-16 12:20:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:21,252 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 2227 transitions. [2022-11-16 12:20:21,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2022-11-16 12:20:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2227 transitions. [2022-11-16 12:20:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 12:20:21,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:21,254 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:21,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:20:21,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:21,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:21,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:21,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1068361891, now seen corresponding path program 1 times [2022-11-16 12:20:21,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:21,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16189153] [2022-11-16 12:20:21,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:21,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:21,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:21,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052098814] [2022-11-16 12:20:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:21,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:21,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:21,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:20:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:22,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:20:22,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:20:22,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:22,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:22,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16189153] [2022-11-16 12:20:22,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:22,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052098814] [2022-11-16 12:20:22,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052098814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:22,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:22,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:20:22,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894535910] [2022-11-16 12:20:22,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:22,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:20:22,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:22,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:20:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:20:22,718 INFO L87 Difference]: Start difference. First operand 1189 states and 2227 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2022-11-16 12:20:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:22,923 INFO L93 Difference]: Finished difference Result 2269 states and 4325 transitions. [2022-11-16 12:20:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:20:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 96 [2022-11-16 12:20:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:22,934 INFO L225 Difference]: With dead ends: 2269 [2022-11-16 12:20:22,934 INFO L226 Difference]: Without dead ends: 1181 [2022-11-16 12:20:22,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:20:22,949 INFO L413 NwaCegarLoop]: 2177 mSDtfsCounter, 1078 mSDsluCounter, 2787 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 4964 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:22,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1578 Valid, 4964 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:20:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-11-16 12:20:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1175. [2022-11-16 12:20:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 668 states have (on average 1.7964071856287425) internal successors, (1200), 1169 states have internal predecessors, (1200), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-16 12:20:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2206 transitions. [2022-11-16 12:20:23,249 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2206 transitions. Word has length 96 [2022-11-16 12:20:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:23,249 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 2206 transitions. [2022-11-16 12:20:23,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2022-11-16 12:20:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2206 transitions. [2022-11-16 12:20:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-16 12:20:23,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:23,252 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:23,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:23,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:20:23,455 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:23,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:23,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1951210737, now seen corresponding path program 1 times [2022-11-16 12:20:23,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:23,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090964866] [2022-11-16 12:20:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:23,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:23,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:23,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995091411] [2022-11-16 12:20:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:23,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:23,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:23,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:23,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:20:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:20:24,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:20:25,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:25,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:25,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090964866] [2022-11-16 12:20:25,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:25,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995091411] [2022-11-16 12:20:25,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995091411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:25,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:25,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:20:25,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938897851] [2022-11-16 12:20:25,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:25,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:20:25,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:25,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:20:25,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:20:25,051 INFO L87 Difference]: Start difference. First operand 1175 states and 2206 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-11-16 12:20:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:25,324 INFO L93 Difference]: Finished difference Result 3442 states and 6516 transitions. [2022-11-16 12:20:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:20:25,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-16 12:20:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:25,343 INFO L225 Difference]: With dead ends: 3442 [2022-11-16 12:20:25,343 INFO L226 Difference]: Without dead ends: 2271 [2022-11-16 12:20:25,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:20:25,352 INFO L413 NwaCegarLoop]: 2733 mSDtfsCounter, 1065 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 4903 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:25,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1567 Valid, 4903 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:20:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-11-16 12:20:25,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2022-11-16 12:20:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 1262 states have (on average 1.8264659270998416) internal successors, (2305), 2263 states have internal predecessors, (2305), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2022-11-16 12:20:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4311 transitions. [2022-11-16 12:20:25,843 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4311 transitions. Word has length 96 [2022-11-16 12:20:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:25,843 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4311 transitions. [2022-11-16 12:20:25,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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) [2022-11-16 12:20:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4311 transitions. [2022-11-16 12:20:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 12:20:25,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:25,846 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:25,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:20:26,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:26,059 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash 969692797, now seen corresponding path program 1 times [2022-11-16 12:20:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:26,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760330931] [2022-11-16 12:20:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:26,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:26,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:26,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981903718] [2022-11-16 12:20:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:26,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:26,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:20:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:20:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:20:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:20:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:20:27,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:20:27,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:20:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760330931] [2022-11-16 12:20:27,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:20:27,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981903718] [2022-11-16 12:20:27,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981903718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:20:27,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:20:27,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:20:27,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422345319] [2022-11-16 12:20:27,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:20:27,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:20:27,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:20:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:20:27,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:20:27,315 INFO L87 Difference]: Start difference. First operand 2269 states and 4311 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:20:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:20:29,373 INFO L93 Difference]: Finished difference Result 3440 states and 6513 transitions. [2022-11-16 12:20:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:20:29,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-11-16 12:20:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:20:29,384 INFO L225 Difference]: With dead ends: 3440 [2022-11-16 12:20:29,385 INFO L226 Difference]: Without dead ends: 1219 [2022-11-16 12:20:29,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:20:29,398 INFO L413 NwaCegarLoop]: 2196 mSDtfsCounter, 2248 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:20:29,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 3267 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 12:20:29,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-11-16 12:20:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1219. [2022-11-16 12:20:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 712 states have (on average 1.7514044943820224) internal successors, (1247), 1213 states have internal predecessors, (1247), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-16 12:20:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2253 transitions. [2022-11-16 12:20:29,638 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2253 transitions. Word has length 111 [2022-11-16 12:20:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:20:29,638 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 2253 transitions. [2022-11-16 12:20:29,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:20:29,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2253 transitions. [2022-11-16 12:20:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-16 12:20:29,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:20:29,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:20:29,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 12:20:29,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:29,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:20:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:20:29,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1641582604, now seen corresponding path program 1 times [2022-11-16 12:20:29,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:20:29,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604013902] [2022-11-16 12:20:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:29,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:20:29,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:20:29,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886700282] [2022-11-16 12:20:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:20:29,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:20:29,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:20:29,941 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:20:29,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:21:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:06,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:21:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:21:06,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:21:06,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:06,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604013902] [2022-11-16 12:21:06,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:21:06,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886700282] [2022-11-16 12:21:06,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886700282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:21:06,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:21:06,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:21:06,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433287223] [2022-11-16 12:21:06,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:21:06,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:21:06,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:21:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:21:06,749 INFO L87 Difference]: Start difference. First operand 1219 states and 2253 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:21:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:06,918 INFO L93 Difference]: Finished difference Result 2390 states and 4455 transitions. [2022-11-16 12:21:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:21:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-11-16 12:21:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:06,932 INFO L225 Difference]: With dead ends: 2390 [2022-11-16 12:21:06,933 INFO L226 Difference]: Without dead ends: 1222 [2022-11-16 12:21:06,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:21:07,006 INFO L413 NwaCegarLoop]: 2188 mSDtfsCounter, 2 mSDsluCounter, 4372 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:07,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6560 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:21:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-11-16 12:21:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1222. [2022-11-16 12:21:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 714 states have (on average 1.7507002801120448) internal successors, (1250), 1216 states have internal predecessors, (1250), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-16 12:21:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 2257 transitions. [2022-11-16 12:21:07,247 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 2257 transitions. Word has length 118 [2022-11-16 12:21:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:07,248 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 2257 transitions. [2022-11-16 12:21:07,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:21:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 2257 transitions. [2022-11-16 12:21:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-16 12:21:07,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:07,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:07,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:07,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:21:07,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:21:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1491787986, now seen corresponding path program 1 times [2022-11-16 12:21:07,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:07,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195137188] [2022-11-16 12:21:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:07,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:21:07,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830593213] [2022-11-16 12:21:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:07,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:07,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:07,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:07,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:21:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:21:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:21:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:21:45,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:21:45,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:45,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195137188] [2022-11-16 12:21:45,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:21:45,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830593213] [2022-11-16 12:21:45,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830593213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:45,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:21:45,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-16 12:21:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70543229] [2022-11-16 12:21:45,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:45,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:21:45,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:45,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:21:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:21:45,506 INFO L87 Difference]: Start difference. First operand 1222 states and 2257 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:21:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:45,845 INFO L93 Difference]: Finished difference Result 2404 states and 4476 transitions. [2022-11-16 12:21:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:21:45,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2022-11-16 12:21:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:45,855 INFO L225 Difference]: With dead ends: 2404 [2022-11-16 12:21:45,856 INFO L226 Difference]: Without dead ends: 1231 [2022-11-16 12:21:45,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:21:45,864 INFO L413 NwaCegarLoop]: 2188 mSDtfsCounter, 16 mSDsluCounter, 6552 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 8740 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:45,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 8740 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:21:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-11-16 12:21:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1231. [2022-11-16 12:21:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 722 states have (on average 1.7479224376731302) internal successors, (1262), 1224 states have internal predecessors, (1262), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-16 12:21:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2269 transitions. [2022-11-16 12:21:46,289 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2269 transitions. Word has length 120 [2022-11-16 12:21:46,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:46,290 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2269 transitions. [2022-11-16 12:21:46,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:21:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2269 transitions. [2022-11-16 12:21:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-16 12:21:46,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:46,294 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:46,333 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 12:21:46,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:21:46,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:21:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash -478386740, now seen corresponding path program 2 times [2022-11-16 12:21:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:46,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866705065] [2022-11-16 12:21:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:46,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:46,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:21:46,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635953203] [2022-11-16 12:21:46,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:21:46,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:46,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:46,632 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:46,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:21:48,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:21:48,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:21:48,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:21:48,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:21:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:21:48,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:21:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:21:48,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:21:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866705065] [2022-11-16 12:21:48,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:21:48,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635953203] [2022-11-16 12:21:48,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635953203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:21:48,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:21:48,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-11-16 12:21:48,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736547467] [2022-11-16 12:21:48,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:21:48,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:21:48,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:21:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:21:48,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:21:48,698 INFO L87 Difference]: Start difference. First operand 1231 states and 2269 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:21:50,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:21:50,379 INFO L93 Difference]: Finished difference Result 2422 states and 4501 transitions. [2022-11-16 12:21:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:21:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-11-16 12:21:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:21:50,390 INFO L225 Difference]: With dead ends: 2422 [2022-11-16 12:21:50,390 INFO L226 Difference]: Without dead ends: 1242 [2022-11-16 12:21:50,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:21:50,400 INFO L413 NwaCegarLoop]: 2189 mSDtfsCounter, 59 mSDsluCounter, 13102 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 15291 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:21:50,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 15291 Invalid, 244 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:21:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-11-16 12:21:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1240. [2022-11-16 12:21:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 731 states have (on average 1.7387140902872777) internal successors, (1271), 1233 states have internal predecessors, (1271), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-16 12:21:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 2278 transitions. [2022-11-16 12:21:50,711 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 2278 transitions. Word has length 124 [2022-11-16 12:21:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:21:50,712 INFO L495 AbstractCegarLoop]: Abstraction has 1240 states and 2278 transitions. [2022-11-16 12:21:50,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:21:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 2278 transitions. [2022-11-16 12:21:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 12:21:50,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:21:50,714 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:21:50,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:21:50,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:21:50,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:21:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:21:50,928 INFO L85 PathProgramCache]: Analyzing trace with hash 711673676, now seen corresponding path program 3 times [2022-11-16 12:21:50,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:21:50,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618064873] [2022-11-16 12:21:50,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:21:50,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:21:51,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:21:51,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013854210] [2022-11-16 12:21:51,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:21:51,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:21:51,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:21:51,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:21:51,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:29:44,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:29:44,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:29:44,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:29:44,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:29:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 12:29:44,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:29:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 12:29:44,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:29:44,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618064873] [2022-11-16 12:29:44,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:29:44,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013854210] [2022-11-16 12:29:44,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013854210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:29:44,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:29:44,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-16 12:29:44,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209239179] [2022-11-16 12:29:44,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:29:44,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:29:44,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:29:44,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:29:44,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:29:44,893 INFO L87 Difference]: Start difference. First operand 1240 states and 2278 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:29:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:29:45,323 INFO L93 Difference]: Finished difference Result 2417 states and 4487 transitions. [2022-11-16 12:29:45,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:29:45,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 130 [2022-11-16 12:29:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:29:45,331 INFO L225 Difference]: With dead ends: 2417 [2022-11-16 12:29:45,332 INFO L226 Difference]: Without dead ends: 1243 [2022-11-16 12:29:45,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:29:45,338 INFO L413 NwaCegarLoop]: 2187 mSDtfsCounter, 24 mSDsluCounter, 8737 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 10924 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:29:45,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 10924 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:29:45,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-11-16 12:29:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1241. [2022-11-16 12:29:45,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 732 states have (on average 1.7363387978142077) internal successors, (1271), 1234 states have internal predecessors, (1271), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-16 12:29:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2278 transitions. [2022-11-16 12:29:45,545 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2278 transitions. Word has length 130 [2022-11-16 12:29:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:29:45,546 INFO L495 AbstractCegarLoop]: Abstraction has 1241 states and 2278 transitions. [2022-11-16 12:29:45,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:29:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2278 transitions. [2022-11-16 12:29:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 12:29:45,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:29:45,548 INFO L195 NwaCegarLoop]: trace histogram [16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:29:45,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:29:45,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:29:45,763 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:29:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:29:45,763 INFO L85 PathProgramCache]: Analyzing trace with hash -756064052, now seen corresponding path program 4 times [2022-11-16 12:29:45,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:29:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006359745] [2022-11-16 12:29:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:29:45,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:29:45,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:29:45,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581669556] [2022-11-16 12:29:45,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:29:45,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:29:45,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:29:45,827 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:29:45,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:34:11,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:34:11,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:34:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 12:34:11,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:34:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 34 proven. 112 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:34:11,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:34:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 81 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 12:34:12,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:34:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006359745] [2022-11-16 12:34:12,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:34:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581669556] [2022-11-16 12:34:12,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581669556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:34:12,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:34:12,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2022-11-16 12:34:12,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891916126] [2022-11-16 12:34:12,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:34:12,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 12:34:12,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:34:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 12:34:12,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-11-16 12:34:12,113 INFO L87 Difference]: Start difference. First operand 1241 states and 2278 transitions. Second operand has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 23 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:34:17,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:34:17,438 INFO L93 Difference]: Finished difference Result 2469 states and 4547 transitions. [2022-11-16 12:34:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:34:17,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 23 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 134 [2022-11-16 12:34:17,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:34:17,446 INFO L225 Difference]: With dead ends: 2469 [2022-11-16 12:34:17,447 INFO L226 Difference]: Without dead ends: 1233 [2022-11-16 12:34:17,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=437, Invalid=1123, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:34:17,453 INFO L413 NwaCegarLoop]: 2164 mSDtfsCounter, 1238 mSDsluCounter, 23270 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 25434 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:34:17,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1743 Valid, 25434 Invalid, 992 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 12:34:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-11-16 12:34:17,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1231. [2022-11-16 12:34:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 722 states have (on average 1.7409972299168974) internal successors, (1257), 1224 states have internal predecessors, (1257), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-16 12:34:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2264 transitions. [2022-11-16 12:34:17,714 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2264 transitions. Word has length 134 [2022-11-16 12:34:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:34:17,714 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2264 transitions. [2022-11-16 12:34:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 23 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:34:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2264 transitions. [2022-11-16 12:34:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-16 12:34:17,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:34:17,718 INFO L195 NwaCegarLoop]: trace histogram [24, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:34:17,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:34:17,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:34:17,943 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:34:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:34:17,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1235397684, now seen corresponding path program 5 times [2022-11-16 12:34:17,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:34:17,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404454829] [2022-11-16 12:34:17,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:34:17,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:34:18,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:34:18,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158596700] [2022-11-16 12:34:18,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:34:18,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:34:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:34:18,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:34:18,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f38df279-6416-43c7-b5ed-0f518420c50d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process