./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R --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 8967c0a6dd6f26859048ef07f7346401bdb19327ee452e685df9b5c4b7492d34 --- 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-38b53e6 [2022-11-25 17:23:09,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:23:09,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:23:09,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:23:09,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:23:09,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:23:09,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:23:09,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:23:09,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:23:09,924 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:23:09,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:23:09,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:23:09,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:23:09,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:23:09,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:23:09,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:23:09,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:23:09,932 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:23:09,934 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:23:09,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:23:09,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:23:09,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:23:09,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:23:09,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:23:09,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:23:09,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:23:09,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:23:09,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:23:09,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:23:09,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:23:09,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:23:09,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:23:09,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:23:09,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:23:09,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:23:09,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:23:09,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:23:09,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:23:09,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:23:09,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:23:09,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:23:09,958 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:23:09,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:23:09,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:23:09,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:23:09,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:23:09,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:23:09,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:23:09,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:23:09,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:23:09,985 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:23:09,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:23:09,986 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:23:09,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:23:09,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:23:09,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:23:09,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:23:09,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:23:09,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:23:09,988 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:23:09,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:23:09,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:23:09,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:23:09,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:23:09,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:23:09,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:23:09,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:23:09,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:23:09,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:23:09,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:23:09,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:23:09,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:23:09,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:23:09,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:23:09,993 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:23:09,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:23:09,993 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8967c0a6dd6f26859048ef07f7346401bdb19327ee452e685df9b5c4b7492d34 [2022-11-25 17:23:10,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:23:10,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:23:10,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:23:10,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:23:10,324 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:23:10,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2022-11-25 17:23:13,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:23:13,656 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:23:13,657 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c [2022-11-25 17:23:13,664 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/data/33b25e496/a3c61f33553d4dc7896071ade6f9fff3/FLAG5258149f1 [2022-11-25 17:23:13,677 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/data/33b25e496/a3c61f33553d4dc7896071ade6f9fff3 [2022-11-25 17:23:13,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:23:13,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:23:13,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:23:13,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:23:13,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:23:13,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317e03ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13, skipping insertion in model container [2022-11-25 17:23:13,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:23:13,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:23:13,852 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c[617,630] [2022-11-25 17:23:13,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:23:13,875 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:23:13,887 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/sv-benchmarks/c/float-benchs/divmul_buf_diverge.c[617,630] [2022-11-25 17:23:13,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:23:13,904 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:23:13,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13 WrapperNode [2022-11-25 17:23:13,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:23:13,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:23:13,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:23:13,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:23:13,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,939 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 47 [2022-11-25 17:23:13,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:23:13,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:23:13,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:23:13,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:23:13,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,959 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:23:13,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:23:13,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:23:13,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:23:13,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (1/1) ... [2022-11-25 17:23:13,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:23:13,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:13,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:23:13,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:23:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:23:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:23:14,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:23:14,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:23:14,098 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:23:14,103 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:23:14,287 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:23:14,303 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:23:14,304 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:23:14,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:23:14 BoogieIcfgContainer [2022-11-25 17:23:14,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:23:14,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:23:14,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:23:14,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:23:14,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:23:13" (1/3) ... [2022-11-25 17:23:14,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c79d24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:23:14, skipping insertion in model container [2022-11-25 17:23:14,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:23:13" (2/3) ... [2022-11-25 17:23:14,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c79d24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:23:14, skipping insertion in model container [2022-11-25 17:23:14,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:23:14" (3/3) ... [2022-11-25 17:23:14,324 INFO L112 eAbstractionObserver]: Analyzing ICFG divmul_buf_diverge.c [2022-11-25 17:23:14,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:23:14,354 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:23:14,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:23:14,434 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;@aacb8c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:23:14,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:23:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 17:23:14,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:14,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:23:14,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash 889620925, now seen corresponding path program 1 times [2022-11-25 17:23:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:14,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402192737] [2022-11-25 17:23:14,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:14,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:14,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:14,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402192737] [2022-11-25 17:23:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402192737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:23:14,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:23:14,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:23:14,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836895819] [2022-11-25 17:23:14,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:23:14,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:23:14,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:14,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:23:14,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:14,835 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-25 17:23:14,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:14,862 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-25 17:23:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:23:14,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-25 17:23:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:14,873 INFO L225 Difference]: With dead ends: 39 [2022-11-25 17:23:14,873 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 17:23:14,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:23:14,880 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:14,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 17:23:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2022-11-25 17:23:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2022-11-25 17:23:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-25 17:23:14,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2022-11-25 17:23:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:14,913 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-25 17:23:14,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-25 17:23:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-25 17:23:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:23:14,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:14,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:14,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:23:14,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash -875759451, now seen corresponding path program 1 times [2022-11-25 17:23:14,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:14,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209849132] [2022-11-25 17:23:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:15,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:15,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209849132] [2022-11-25 17:23:15,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209849132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213011823] [2022-11-25 17:23:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:15,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:15,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:15,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:23:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:15,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:23:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:15,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:15,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213011823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:15,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:15,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 17:23:15,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642334967] [2022-11-25 17:23:15,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:15,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:23:15,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:23:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:15,294 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:15,324 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-11-25 17:23:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:23:15,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 17:23:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:15,326 INFO L225 Difference]: With dead ends: 39 [2022-11-25 17:23:15,326 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 17:23:15,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:23:15,328 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:15,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 44 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:23:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 17:23:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-25 17:23:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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) [2022-11-25 17:23:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-25 17:23:15,336 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2022-11-25 17:23:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:15,336 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-25 17:23:15,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:23:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-25 17:23:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 17:23:15,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:15,338 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:15,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:15,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:15,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:15,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1424528451, now seen corresponding path program 2 times [2022-11-25 17:23:15,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:15,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489820290] [2022-11-25 17:23:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:15,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:15,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:15,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489820290] [2022-11-25 17:23:15,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489820290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:15,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843594233] [2022-11-25 17:23:15,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:23:15,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:15,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:15,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:15,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:23:15,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:23:15,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:23:15,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:15,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:16,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843594233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:16,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:16,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 17:23:16,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580979583] [2022-11-25 17:23:16,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:16,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:23:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:16,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:23:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:23:16,075 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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) [2022-11-25 17:23:16,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:16,174 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-11-25 17:23:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:23:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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 26 [2022-11-25 17:23:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:16,176 INFO L225 Difference]: With dead ends: 81 [2022-11-25 17:23:16,178 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 17:23:16,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:23:16,183 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:16,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 90 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 17:23:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-25 17:23:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 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) [2022-11-25 17:23:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2022-11-25 17:23:16,197 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 26 [2022-11-25 17:23:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:16,198 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2022-11-25 17:23:16,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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) [2022-11-25 17:23:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2022-11-25 17:23:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-25 17:23:16,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:16,200 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:16,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 17:23:16,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:16,410 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:16,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash -998809923, now seen corresponding path program 3 times [2022-11-25 17:23:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:16,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753795903] [2022-11-25 17:23:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:16,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:16,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753795903] [2022-11-25 17:23:16,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753795903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854569446] [2022-11-25 17:23:16,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:23:16,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:16,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:16,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:16,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:23:16,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-25 17:23:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:23:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:17,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:17,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854569446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:17,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:17,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-25 17:23:17,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623567436] [2022-11-25 17:23:17,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:17,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:23:17,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:17,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:23:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:23:17,445 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 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) [2022-11-25 17:23:17,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:17,597 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2022-11-25 17:23:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 17:23:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 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 56 [2022-11-25 17:23:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:17,606 INFO L225 Difference]: With dead ends: 165 [2022-11-25 17:23:17,607 INFO L226 Difference]: Without dead ends: 161 [2022-11-25 17:23:17,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:23:17,611 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 197 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:17,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 154 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-25 17:23:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-11-25 17:23:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.14375) internal successors, (183), 160 states have internal predecessors, (183), 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) [2022-11-25 17:23:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2022-11-25 17:23:17,634 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 56 [2022-11-25 17:23:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:17,635 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2022-11-25 17:23:17,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 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) [2022-11-25 17:23:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2022-11-25 17:23:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 17:23:17,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:17,646 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:17,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:23:17,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:17,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 870679741, now seen corresponding path program 4 times [2022-11-25 17:23:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:17,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329938797] [2022-11-25 17:23:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:17,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:18,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:18,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329938797] [2022-11-25 17:23:18,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329938797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:18,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355897207] [2022-11-25 17:23:18,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:23:18,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:18,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:18,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:18,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:23:18,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:23:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:23:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:19,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:20,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355897207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:20,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:20,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-25 17:23:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709987227] [2022-11-25 17:23:20,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:20,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 17:23:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 17:23:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:23:20,143 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 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) [2022-11-25 17:23:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:20,417 INFO L93 Difference]: Finished difference Result 333 states and 402 transitions. [2022-11-25 17:23:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:23:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 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 116 [2022-11-25 17:23:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:20,420 INFO L225 Difference]: With dead ends: 333 [2022-11-25 17:23:20,420 INFO L226 Difference]: Without dead ends: 329 [2022-11-25 17:23:20,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 17:23:20,422 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 542 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:20,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 298 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:23:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-25 17:23:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-11-25 17:23:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.1432926829268293) internal successors, (375), 328 states have internal predecessors, (375), 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) [2022-11-25 17:23:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 375 transitions. [2022-11-25 17:23:20,443 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 375 transitions. Word has length 116 [2022-11-25 17:23:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:20,444 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 375 transitions. [2022-11-25 17:23:20,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.775510204081633) internal successors, (234), 49 states have internal predecessors, (234), 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) [2022-11-25 17:23:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 375 transitions. [2022-11-25 17:23:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-25 17:23:20,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:20,447 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:20,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:20,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:20,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash 582668477, now seen corresponding path program 5 times [2022-11-25 17:23:20,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:20,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483280874] [2022-11-25 17:23:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:20,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:23,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483280874] [2022-11-25 17:23:23,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483280874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:23,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209560579] [2022-11-25 17:23:23,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:23:23,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:23,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:23,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:23,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:23:23,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-25 17:23:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:23,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:23:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:23,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209560579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:27,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:27,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-11-25 17:23:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938564916] [2022-11-25 17:23:27,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:27,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-25 17:23:27,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:27,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-25 17:23:27,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-25 17:23:27,258 INFO L87 Difference]: Start difference. First operand 329 states and 375 transitions. Second operand has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 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) [2022-11-25 17:23:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:23:28,959 INFO L93 Difference]: Finished difference Result 669 states and 810 transitions. [2022-11-25 17:23:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-25 17:23:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 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 236 [2022-11-25 17:23:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:23:28,963 INFO L225 Difference]: With dead ends: 669 [2022-11-25 17:23:28,963 INFO L226 Difference]: Without dead ends: 665 [2022-11-25 17:23:28,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-11-25 17:23:28,967 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1244 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:23:28,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1244 Valid, 586 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:23:28,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-11-25 17:23:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-11-25 17:23:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.1430722891566265) internal successors, (759), 664 states have internal predecessors, (759), 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) [2022-11-25 17:23:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 759 transitions. [2022-11-25 17:23:28,990 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 759 transitions. Word has length 236 [2022-11-25 17:23:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:23:28,991 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 759 transitions. [2022-11-25 17:23:28,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.88659793814433) internal successors, (474), 97 states have internal predecessors, (474), 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) [2022-11-25 17:23:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 759 transitions. [2022-11-25 17:23:28,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-11-25 17:23:28,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:23:28,999 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-11-25 17:23:29,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:23:29,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:29,205 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:23:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:23:29,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1974900547, now seen corresponding path program 6 times [2022-11-25 17:23:29,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:23:29,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994812129] [2022-11-25 17:23:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:23:29,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:23:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:23:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:37,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:23:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994812129] [2022-11-25 17:23:37,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994812129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:23:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564952889] [2022-11-25 17:23:37,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:23:37,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:23:37,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:23:37,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:23:37,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:23:37,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-11-25 17:23:37,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:23:37,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-25 17:23:37,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:23:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:38,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:23:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:23:50,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564952889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:23:50,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:23:50,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-11-25 17:23:50,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387920702] [2022-11-25 17:23:50,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:23:50,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-25 17:23:50,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:23:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-25 17:23:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-25 17:23:50,714 INFO L87 Difference]: Start difference. First operand 665 states and 759 transitions. Second operand has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 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) [2022-11-25 17:24:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:02,005 INFO L93 Difference]: Finished difference Result 1341 states and 1626 transitions. [2022-11-25 17:24:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-25 17:24:02,006 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 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 476 [2022-11-25 17:24:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:02,011 INFO L225 Difference]: With dead ends: 1341 [2022-11-25 17:24:02,012 INFO L226 Difference]: Without dead ends: 1337 [2022-11-25 17:24:02,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2022-11-25 17:24:02,029 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3191 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3191 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:02,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3191 Valid, 1156 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:24:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-11-25 17:24:02,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1337. [2022-11-25 17:24:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 1.1429640718562875) internal successors, (1527), 1336 states have internal predecessors, (1527), 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) [2022-11-25 17:24:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1527 transitions. [2022-11-25 17:24:02,057 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1527 transitions. Word has length 476 [2022-11-25 17:24:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:02,058 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 1527 transitions. [2022-11-25 17:24:02,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 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) [2022-11-25 17:24:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1527 transitions. [2022-11-25 17:24:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2022-11-25 17:24:02,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:02,093 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1] [2022-11-25 17:24:02,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:02,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:02,304 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:24:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash -789145411, now seen corresponding path program 7 times [2022-11-25 17:24:02,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:02,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252594219] [2022-11-25 17:24:02,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:02,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:31,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:31,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252594219] [2022-11-25 17:24:31,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252594219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:24:31,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199246275] [2022-11-25 17:24:31,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:24:31,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:31,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:31,340 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:31,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:24:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:24:31,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-25 17:24:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:24:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:17,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199246275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:17,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:17,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-11-25 17:25:17,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31649611] [2022-11-25 17:25:17,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:17,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-25 17:25:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-25 17:25:18,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-11-25 17:25:18,028 INFO L87 Difference]: Start difference. First operand 1337 states and 1527 transitions. Second operand has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 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) [2022-11-25 17:27:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:27:53,366 INFO L93 Difference]: Finished difference Result 2685 states and 3258 transitions. [2022-11-25 17:27:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-25 17:27:53,368 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 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 956 [2022-11-25 17:27:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:27:53,378 INFO L225 Difference]: With dead ends: 2685 [2022-11-25 17:27:53,378 INFO L226 Difference]: Without dead ends: 2681 [2022-11-25 17:27:53,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2103 GetRequests, 1720 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2022-11-25 17:27:53,387 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6281 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6281 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:27:53,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6281 Valid, 2328 Invalid, 775 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 17:27:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2022-11-25 17:27:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2681. [2022-11-25 17:27:53,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2680 states have (on average 1.142910447761194) internal successors, (3063), 2680 states have internal predecessors, (3063), 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) [2022-11-25 17:27:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3063 transitions. [2022-11-25 17:27:53,439 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3063 transitions. Word has length 956 [2022-11-25 17:27:53,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:27:53,440 INFO L495 AbstractCegarLoop]: Abstraction has 2681 states and 3063 transitions. [2022-11-25 17:27:53,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 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) [2022-11-25 17:27:53,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3063 transitions. [2022-11-25 17:27:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2022-11-25 17:27:53,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:27:53,504 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 382, 382, 382, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:53,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:53,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:27:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1131349827, now seen corresponding path program 8 times [2022-11-25 17:27:53,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:53,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689909024] [2022-11-25 17:27:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:53,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:23,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:23,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689909024] [2022-11-25 17:30:23,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689909024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:23,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317390820] [2022-11-25 17:30:23,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:30:23,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:23,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:23,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:23,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c23bc9d2-cad5-42ba-bc4d-b05596466618/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:30:23,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:30:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:24,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 3855 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-25 17:30:24,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:26,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:27,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317390820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:27,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:33:27,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2022-11-25 17:33:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248514357] [2022-11-25 17:33:27,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:27,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-11-25 17:33:27,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:27,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-11-25 17:33:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2022-11-25 17:33:27,735 INFO L87 Difference]: Start difference. First operand 2681 states and 3063 transitions. Second operand has 769 states, 769 states have (on average 4.985695708712614) internal successors, (3834), 769 states have internal predecessors, (3834), 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)