./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro --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 4030584521f36b8dc597e2fe097d1241b197ec784cb344ca35f6903bd5f84f17 --- 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-8393723 [2022-11-18 21:04:02,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:04:02,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:04:02,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:04:02,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:04:02,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:04:02,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:04:02,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:04:02,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:04:02,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:04:02,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:04:02,933 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:04:02,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:04:02,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:04:02,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:04:02,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:04:02,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:04:02,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:04:02,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:04:02,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:04:02,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:04:02,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:04:02,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:04:02,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:04:02,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:04:02,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:04:02,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:04:02,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:04:02,972 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:04:02,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:04:02,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:04:02,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:04:02,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:04:02,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:04:02,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:04:02,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:04:02,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:04:02,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:04:02,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:04:02,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:04:02,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:04:02,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 21:04:03,028 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:04:03,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:04:03,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:04:03,032 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:04:03,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:04:03,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:04:03,034 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:04:03,034 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:04:03,035 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:04:03,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:04:03,036 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:04:03,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:04:03,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:04:03,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:04:03,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:04:03,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:04:03,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:04:03,038 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:04:03,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:04:03,038 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:04:03,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:04:03,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:04:03,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:04:03,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:04:03,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:04:03,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:04:03,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:04:03,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:04:03,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:04:03,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:04:03,042 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:04:03,042 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:04:03,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:04:03,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4030584521f36b8dc597e2fe097d1241b197ec784cb344ca35f6903bd5f84f17 [2022-11-18 21:04:03,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:04:03,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:04:03,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:04:03,378 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:04:03,379 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:04:03,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-11-18 21:04:03,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/data/c4dac43cc/a96e68bd1e94483b987b8c171c455420/FLAGb02f080f7 [2022-11-18 21:04:03,937 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:04:03,937 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2022-11-18 21:04:03,951 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/data/c4dac43cc/a96e68bd1e94483b987b8c171c455420/FLAGb02f080f7 [2022-11-18 21:04:04,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/data/c4dac43cc/a96e68bd1e94483b987b8c171c455420 [2022-11-18 21:04:04,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:04:04,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:04:04,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:04:04,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:04:04,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:04:04,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37176380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04, skipping insertion in model container [2022-11-18 21:04:04,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:04:04,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:04:04,618 WARN L234 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_15babeef-f00b-4a79-84a7-a689467984f5/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2022-11-18 21:04:04,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:04:04,673 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:04:04,695 WARN L234 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_15babeef-f00b-4a79-84a7-a689467984f5/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2022-11-18 21:04:04,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:04:04,737 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:04:04,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04 WrapperNode [2022-11-18 21:04:04,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:04:04,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:04:04,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:04:04,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:04:04,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,790 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-18 21:04:04,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:04:04,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:04:04,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:04:04,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:04:04,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,831 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:04:04,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:04:04,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:04:04,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:04:04,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (1/1) ... [2022-11-18 21:04:04,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:04:04,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:04,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:04:04,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:04:04,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:04:04,926 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 21:04:04,926 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 21:04:04,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:04:04,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:04:04,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:04:04,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 21:04:04,928 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 21:04:05,008 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:04:05,011 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:04:05,179 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:04:05,185 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:04:05,185 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 21:04:05,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:04:05 BoogieIcfgContainer [2022-11-18 21:04:05,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:04:05,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:04:05,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:04:05,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:04:05,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:04:04" (1/3) ... [2022-11-18 21:04:05,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5caf42a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:04:05, skipping insertion in model container [2022-11-18 21:04:05,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:04" (2/3) ... [2022-11-18 21:04:05,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5caf42a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:04:05, skipping insertion in model container [2022-11-18 21:04:05,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:04:05" (3/3) ... [2022-11-18 21:04:05,197 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.c [2022-11-18 21:04:05,217 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:04:05,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 21:04:05,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:04:05,303 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;@5e13eb4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:04:05,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 21:04:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 21:04:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 21:04:05,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:05,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:05,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:05,351 INFO L85 PathProgramCache]: Analyzing trace with hash 738208203, now seen corresponding path program 1 times [2022-11-18 21:04:05,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951854621] [2022-11-18 21:04:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:05,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:05,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:05,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107495668] [2022-11-18 21:04:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:05,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:05,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:05,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:04:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 21:04:05,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:04:05,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:05,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:05,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951854621] [2022-11-18 21:04:05,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:05,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107495668] [2022-11-18 21:04:05,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107495668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:05,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:05,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:04:05,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794666317] [2022-11-18 21:04:05,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:05,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 21:04:05,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 21:04:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:04:05,743 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:04:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:05,779 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2022-11-18 21:04:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 21:04:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-18 21:04:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:05,791 INFO L225 Difference]: With dead ends: 61 [2022-11-18 21:04:05,792 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 21:04:05,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:04:05,805 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:05,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 21:04:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-18 21:04:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:04:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-18 21:04:05,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-11-18 21:04:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:05,853 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-18 21:04:05,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:04:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-18 21:04:05,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 21:04:05,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:05,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:05,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 21:04:06,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 21:04:06,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1770759922, now seen corresponding path program 1 times [2022-11-18 21:04:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:06,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496922439] [2022-11-18 21:04:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:06,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:06,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005389392] [2022-11-18 21:04:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:06,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:06,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:06,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:06,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:04:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:06,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 21:04:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:06,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:06,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:06,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496922439] [2022-11-18 21:04:06,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:06,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005389392] [2022-11-18 21:04:06,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005389392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:06,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:06,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:06,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832252706] [2022-11-18 21:04:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:06,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:06,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:06,313 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 21:04:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:06,343 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-11-18 21:04:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-18 21:04:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:06,349 INFO L225 Difference]: With dead ends: 37 [2022-11-18 21:04:06,349 INFO L226 Difference]: Without dead ends: 30 [2022-11-18 21:04:06,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:06,350 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:06,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-18 21:04:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-18 21:04:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:04:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-11-18 21:04:06,359 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2022-11-18 21:04:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:06,360 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-11-18 21:04:06,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 21:04:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-11-18 21:04:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 21:04:06,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:06,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:06,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:06,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-18 21:04:06,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:06,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1769091626, now seen corresponding path program 1 times [2022-11-18 21:04:06,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:06,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357520108] [2022-11-18 21:04:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:06,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:06,582 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:06,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983817818] [2022-11-18 21:04:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:06,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:06,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:06,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:06,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:04:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:04:06,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:06,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357520108] [2022-11-18 21:04:06,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:06,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983817818] [2022-11-18 21:04:06,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983817818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:06,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:06,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 21:04:06,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788509538] [2022-11-18 21:04:06,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:06,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 21:04:06,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 21:04:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:04:06,973 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 21:04:08,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:04:13,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:04:14,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:04:16,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 21:04:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:16,163 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-11-18 21:04:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:04:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-18 21:04:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:16,165 INFO L225 Difference]: With dead ends: 49 [2022-11-18 21:04:16,165 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 21:04:16,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:16,166 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:16,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 122 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-11-18 21:04:16,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 21:04:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-11-18 21:04:16,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 21:04:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-11-18 21:04:16,185 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 19 [2022-11-18 21:04:16,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:16,186 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-11-18 21:04:16,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 21:04:16,187 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-11-18 21:04:16,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 21:04:16,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:16,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:16,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 21:04:16,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:16,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash -82041861, now seen corresponding path program 1 times [2022-11-18 21:04:16,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:16,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438568761] [2022-11-18 21:04:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:16,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:16,409 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:16,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242253916] [2022-11-18 21:04:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:16,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:16,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:16,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:16,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:04:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:16,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 21:04:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:16,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438568761] [2022-11-18 21:04:16,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:16,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242253916] [2022-11-18 21:04:16,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242253916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:16,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:16,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-18 21:04:16,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487569065] [2022-11-18 21:04:16,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:16,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:04:16,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:16,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:04:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:04:16,820 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 21:04:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:17,126 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-11-18 21:04:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:04:17,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-11-18 21:04:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:17,129 INFO L225 Difference]: With dead ends: 53 [2022-11-18 21:04:17,129 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 21:04:17,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:04:17,131 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:17,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:04:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 21:04:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2022-11-18 21:04:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:04:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-18 21:04:17,150 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 25 [2022-11-18 21:04:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:17,151 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-18 21:04:17,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 21:04:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-18 21:04:17,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-18 21:04:17,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:17,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:17,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:17,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:17,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1145481658, now seen corresponding path program 1 times [2022-11-18 21:04:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:17,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525456240] [2022-11-18 21:04:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:17,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:17,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332500454] [2022-11-18 21:04:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:17,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:17,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:17,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:17,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:04:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:17,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 21:04:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:17,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:17,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:17,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525456240] [2022-11-18 21:04:17,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:17,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332500454] [2022-11-18 21:04:17,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332500454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:17,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:17,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:04:17,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071625599] [2022-11-18 21:04:17,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:17,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:17,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:17,541 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 21:04:17,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:17,608 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-11-18 21:04:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:17,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-11-18 21:04:17,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:17,609 INFO L225 Difference]: With dead ends: 61 [2022-11-18 21:04:17,610 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 21:04:17,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:17,615 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:17,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 109 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 21:04:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-18 21:04:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 21:04:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-11-18 21:04:17,651 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 31 [2022-11-18 21:04:17,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:17,652 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-11-18 21:04:17,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-18 21:04:17,654 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-11-18 21:04:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 21:04:17,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:17,656 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:17,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:17,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:17,862 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:17,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:17,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1102972225, now seen corresponding path program 1 times [2022-11-18 21:04:17,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:17,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626915302] [2022-11-18 21:04:17,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:17,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:17,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:17,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326475467] [2022-11-18 21:04:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:17,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:17,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:17,901 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:17,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:04:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:17,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 21:04:17,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:18,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:04:18,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:18,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626915302] [2022-11-18 21:04:18,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:18,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326475467] [2022-11-18 21:04:18,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326475467] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:18,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:04:18,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-11-18 21:04:18,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809079036] [2022-11-18 21:04:18,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:18,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:04:18,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:04:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:18,158 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 21:04:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:18,223 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-11-18 21:04:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:18,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-11-18 21:04:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:18,225 INFO L225 Difference]: With dead ends: 70 [2022-11-18 21:04:18,225 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 21:04:18,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:18,227 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:18,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 114 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:18,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 21:04:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-11-18 21:04:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 21:04:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-18 21:04:18,248 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2022-11-18 21:04:18,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:18,248 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-18 21:04:18,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 21:04:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-18 21:04:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 21:04:18,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:18,250 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:18,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:18,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 21:04:18,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:18,464 INFO L85 PathProgramCache]: Analyzing trace with hash 30895492, now seen corresponding path program 1 times [2022-11-18 21:04:18,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:18,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469712776] [2022-11-18 21:04:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:18,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:18,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:18,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113558034] [2022-11-18 21:04:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:18,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:18,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:18,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:18,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:04:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:18,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 21:04:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:18,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:04:18,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:18,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469712776] [2022-11-18 21:04:18,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:18,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113558034] [2022-11-18 21:04:18,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113558034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:18,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:18,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-18 21:04:18,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046751840] [2022-11-18 21:04:18,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:18,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:04:18,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:18,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:04:18,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:18,737 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-18 21:04:18,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:18,989 INFO L93 Difference]: Finished difference Result 125 states and 156 transitions. [2022-11-18 21:04:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:04:18,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2022-11-18 21:04:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:18,992 INFO L225 Difference]: With dead ends: 125 [2022-11-18 21:04:18,992 INFO L226 Difference]: Without dead ends: 104 [2022-11-18 21:04:18,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:04:18,994 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 89 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:18,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 215 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-18 21:04:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2022-11-18 21:04:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 68 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 21:04:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2022-11-18 21:04:19,079 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 39 [2022-11-18 21:04:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:19,080 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2022-11-18 21:04:19,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-18 21:04:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2022-11-18 21:04:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 21:04:19,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:19,087 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:19,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:19,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:19,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash -798356602, now seen corresponding path program 1 times [2022-11-18 21:04:19,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:19,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242354006] [2022-11-18 21:04:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:19,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:19,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:19,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598004055] [2022-11-18 21:04:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:19,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:19,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:19,317 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:19,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 21:04:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:19,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 21:04:19,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 21:04:19,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:04:19,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242354006] [2022-11-18 21:04:19,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:19,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598004055] [2022-11-18 21:04:19,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598004055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:19,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:19,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:04:19,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948724741] [2022-11-18 21:04:19,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:19,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:19,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:19,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:19,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:19,468 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 21:04:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:19,570 INFO L93 Difference]: Finished difference Result 154 states and 198 transitions. [2022-11-18 21:04:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:19,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2022-11-18 21:04:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:19,576 INFO L225 Difference]: With dead ends: 154 [2022-11-18 21:04:19,576 INFO L226 Difference]: Without dead ends: 115 [2022-11-18 21:04:19,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:19,580 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 19 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:19,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 109 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-18 21:04:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-11-18 21:04:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 79 states have internal predecessors, (96), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-18 21:04:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 133 transitions. [2022-11-18 21:04:19,644 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 133 transitions. Word has length 43 [2022-11-18 21:04:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:19,644 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 133 transitions. [2022-11-18 21:04:19,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-18 21:04:19,645 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 133 transitions. [2022-11-18 21:04:19,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 21:04:19,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:19,646 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:19,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:19,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:19,853 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:19,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1023958197, now seen corresponding path program 1 times [2022-11-18 21:04:19,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:19,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374314521] [2022-11-18 21:04:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:19,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:19,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:19,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746706208] [2022-11-18 21:04:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:19,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:19,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:19,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:19,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 21:04:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 21:04:19,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:20,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 21:04:20,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374314521] [2022-11-18 21:04:20,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746706208] [2022-11-18 21:04:20,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746706208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:20,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:20,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-18 21:04:20,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573932780] [2022-11-18 21:04:20,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:20,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:04:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:04:20,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:04:20,187 INFO L87 Difference]: Start difference. First operand 105 states and 133 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-18 21:04:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:20,555 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2022-11-18 21:04:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:04:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 45 [2022-11-18 21:04:20,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:20,557 INFO L225 Difference]: With dead ends: 215 [2022-11-18 21:04:20,558 INFO L226 Difference]: Without dead ends: 168 [2022-11-18 21:04:20,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:04:20,559 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 156 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:20,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 234 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:04:20,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-18 21:04:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2022-11-18 21:04:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 112 states have internal predecessors, (138), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-18 21:04:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 193 transitions. [2022-11-18 21:04:20,621 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 193 transitions. Word has length 45 [2022-11-18 21:04:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:20,622 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 193 transitions. [2022-11-18 21:04:20,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-11-18 21:04:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 193 transitions. [2022-11-18 21:04:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 21:04:20,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:20,624 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:20,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:20,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:20,831 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:20,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1104536814, now seen corresponding path program 1 times [2022-11-18 21:04:20,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380366214] [2022-11-18 21:04:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:20,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:20,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:20,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369217808] [2022-11-18 21:04:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:20,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:20,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:20,856 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:20,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:04:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:20,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 21:04:20,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:21,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 21:04:21,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:21,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380366214] [2022-11-18 21:04:21,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369217808] [2022-11-18 21:04:21,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369217808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:21,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:21,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-18 21:04:21,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279481390] [2022-11-18 21:04:21,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:21,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:04:21,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:21,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:04:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:04:21,229 INFO L87 Difference]: Start difference. First operand 149 states and 193 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-18 21:04:21,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:21,684 INFO L93 Difference]: Finished difference Result 207 states and 274 transitions. [2022-11-18 21:04:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 21:04:21,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 51 [2022-11-18 21:04:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:21,689 INFO L225 Difference]: With dead ends: 207 [2022-11-18 21:04:21,690 INFO L226 Difference]: Without dead ends: 202 [2022-11-18 21:04:21,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:04:21,691 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 213 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:21,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 234 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:04:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-18 21:04:21,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2022-11-18 21:04:21,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 148 states have internal predecessors, (178), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-18 21:04:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 253 transitions. [2022-11-18 21:04:21,769 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 253 transitions. Word has length 51 [2022-11-18 21:04:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:21,772 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 253 transitions. [2022-11-18 21:04:21,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-18 21:04:21,773 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 253 transitions. [2022-11-18 21:04:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 21:04:21,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:21,777 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:21,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:21,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 21:04:21,984 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:21,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:21,985 INFO L85 PathProgramCache]: Analyzing trace with hash 540498080, now seen corresponding path program 1 times [2022-11-18 21:04:21,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:21,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784300753] [2022-11-18 21:04:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:21,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:22,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:22,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653322582] [2022-11-18 21:04:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:22,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:22,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:22,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 21:04:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:22,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:04:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-18 21:04:22,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-18 21:04:22,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:22,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784300753] [2022-11-18 21:04:22,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:22,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653322582] [2022-11-18 21:04:22,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653322582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:22,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:22,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-18 21:04:22,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450272779] [2022-11-18 21:04:22,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:22,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:22,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:22,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:22,287 INFO L87 Difference]: Start difference. First operand 194 states and 253 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-18 21:04:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:22,547 INFO L93 Difference]: Finished difference Result 498 states and 693 transitions. [2022-11-18 21:04:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:22,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2022-11-18 21:04:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:22,551 INFO L225 Difference]: With dead ends: 498 [2022-11-18 21:04:22,552 INFO L226 Difference]: Without dead ends: 355 [2022-11-18 21:04:22,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:22,556 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:22,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 130 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-18 21:04:22,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2022-11-18 21:04:22,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 254 states have (on average 1.2677165354330708) internal successors, (322), 260 states have internal predecessors, (322), 72 states have call successors, (72), 12 states have call predecessors, (72), 11 states have return successors, (71), 65 states have call predecessors, (71), 71 states have call successors, (71) [2022-11-18 21:04:22,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 465 transitions. [2022-11-18 21:04:22,708 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 465 transitions. Word has length 87 [2022-11-18 21:04:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:22,709 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 465 transitions. [2022-11-18 21:04:22,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-18 21:04:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 465 transitions. [2022-11-18 21:04:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 21:04:22,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:22,712 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:22,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:22,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 21:04:22,919 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -134976430, now seen corresponding path program 2 times [2022-11-18 21:04:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:22,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615844689] [2022-11-18 21:04:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:22,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:22,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:22,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366826008] [2022-11-18 21:04:22,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:04:22,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:22,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:22,947 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:22,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 21:04:23,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:04:23,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:04:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 58 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:04:23,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-18 21:04:23,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:23,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615844689] [2022-11-18 21:04:23,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:23,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366826008] [2022-11-18 21:04:23,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366826008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:23,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:23,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2022-11-18 21:04:23,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818253992] [2022-11-18 21:04:23,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:23,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:04:23,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:23,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:04:23,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:04:23,493 INFO L87 Difference]: Start difference. First operand 338 states and 465 transitions. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-11-18 21:04:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:23,969 INFO L93 Difference]: Finished difference Result 467 states and 646 transitions. [2022-11-18 21:04:23,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 21:04:23,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) Word has length 87 [2022-11-18 21:04:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:23,972 INFO L225 Difference]: With dead ends: 467 [2022-11-18 21:04:23,972 INFO L226 Difference]: Without dead ends: 348 [2022-11-18 21:04:23,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 154 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:04:23,974 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 121 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:23,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 243 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:04:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-18 21:04:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2022-11-18 21:04:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 262 states have (on average 1.2251908396946565) internal successors, (321), 262 states have internal predecessors, (321), 70 states have call successors, (70), 12 states have call predecessors, (70), 11 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-18 21:04:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 460 transitions. [2022-11-18 21:04:24,138 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 460 transitions. Word has length 87 [2022-11-18 21:04:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:24,139 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 460 transitions. [2022-11-18 21:04:24,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 11 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2022-11-18 21:04:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 460 transitions. [2022-11-18 21:04:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-18 21:04:24,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:24,147 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:24,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:24,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 21:04:24,354 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:24,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2132027339, now seen corresponding path program 1 times [2022-11-18 21:04:24,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:24,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814742033] [2022-11-18 21:04:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:24,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:24,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:24,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306249593] [2022-11-18 21:04:24,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:24,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:24,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:24,378 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:24,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 21:04:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:24,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:04:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:04:24,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-18 21:04:24,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:24,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814742033] [2022-11-18 21:04:24,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:04:24,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306249593] [2022-11-18 21:04:24,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306249593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:24,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:24,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2022-11-18 21:04:24,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29201905] [2022-11-18 21:04:24,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:24,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:04:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:24,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:04:24,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:04:24,905 INFO L87 Difference]: Start difference. First operand 344 states and 460 transitions. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-18 21:04:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:25,336 INFO L93 Difference]: Finished difference Result 453 states and 622 transitions. [2022-11-18 21:04:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 21:04:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 93 [2022-11-18 21:04:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:25,339 INFO L225 Difference]: With dead ends: 453 [2022-11-18 21:04:25,339 INFO L226 Difference]: Without dead ends: 342 [2022-11-18 21:04:25,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 162 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:04:25,341 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 131 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:25,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 219 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:04:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-18 21:04:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-11-18 21:04:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 260 states have (on average 1.2) internal successors, (312), 260 states have internal predecessors, (312), 70 states have call successors, (70), 12 states have call predecessors, (70), 11 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-18 21:04:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 451 transitions. [2022-11-18 21:04:25,455 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 451 transitions. Word has length 93 [2022-11-18 21:04:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:25,455 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 451 transitions. [2022-11-18 21:04:25,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 11 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-18 21:04:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 451 transitions. [2022-11-18 21:04:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-18 21:04:25,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:25,458 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:25,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:25,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 21:04:25,664 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:04:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:25,665 INFO L85 PathProgramCache]: Analyzing trace with hash 519126930, now seen corresponding path program 1 times [2022-11-18 21:04:25,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:25,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483619081] [2022-11-18 21:04:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:25,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:25,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:04:25,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045367724] [2022-11-18 21:04:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:25,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:25,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:25,677 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:25,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 21:04:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 21:04:25,763 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 21:04:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 21:04:25,834 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 21:04:25,835 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 21:04:25,836 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-18 21:04:25,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:26,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:26,047 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:26,051 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 21:04:26,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 09:04:26 BoogieIcfgContainer [2022-11-18 21:04:26,101 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 21:04:26,102 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 21:04:26,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 21:04:26,102 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 21:04:26,103 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:04:05" (3/4) ... [2022-11-18 21:04:26,105 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-18 21:04:26,189 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 21:04:26,189 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 21:04:26,190 INFO L158 Benchmark]: Toolchain (without parser) took 21870.84ms. Allocated memory was 104.9MB in the beginning and 188.7MB in the end (delta: 83.9MB). Free memory was 43.3MB in the beginning and 161.7MB in the end (delta: -118.4MB). Peak memory consumption was 75.5MB. Max. memory is 16.1GB. [2022-11-18 21:04:26,190 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 59.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 21:04:26,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 417.01ms. Allocated memory was 104.9MB in the beginning and 157.3MB in the end (delta: 52.4MB). Free memory was 43.0MB in the beginning and 131.7MB in the end (delta: -88.7MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. [2022-11-18 21:04:26,191 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.24ms. Allocated memory is still 157.3MB. Free memory was 131.7MB in the beginning and 129.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 21:04:26,192 INFO L158 Benchmark]: Boogie Preprocessor took 47.97ms. Allocated memory is still 157.3MB. Free memory was 129.9MB in the beginning and 129.0MB in the end (delta: 882.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 21:04:26,192 INFO L158 Benchmark]: RCFGBuilder took 346.94ms. Allocated memory is still 157.3MB. Free memory was 128.5MB in the beginning and 116.4MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 21:04:26,192 INFO L158 Benchmark]: TraceAbstraction took 20911.10ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 115.9MB in the beginning and 58.1MB in the end (delta: 57.7MB). Peak memory consumption was 90.3MB. Max. memory is 16.1GB. [2022-11-18 21:04:26,193 INFO L158 Benchmark]: Witness Printer took 87.91ms. Allocated memory is still 188.7MB. Free memory was 58.1MB in the beginning and 161.7MB in the end (delta: -103.6MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2022-11-18 21:04:26,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory is still 59.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 417.01ms. Allocated memory was 104.9MB in the beginning and 157.3MB in the end (delta: 52.4MB). Free memory was 43.0MB in the beginning and 131.7MB in the end (delta: -88.7MB). Peak memory consumption was 11.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.24ms. Allocated memory is still 157.3MB. Free memory was 131.7MB in the beginning and 129.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.97ms. Allocated memory is still 157.3MB. Free memory was 129.9MB in the beginning and 129.0MB in the end (delta: 882.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 346.94ms. Allocated memory is still 157.3MB. Free memory was 128.5MB in the beginning and 116.4MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 20911.10ms. Allocated memory was 157.3MB in the beginning and 188.7MB in the end (delta: 31.5MB). Free memory was 115.9MB in the beginning and 58.1MB in the end (delta: 57.7MB). Peak memory consumption was 90.3MB. Max. memory is 16.1GB. * Witness Printer took 87.91ms. Allocated memory is still 188.7MB. Free memory was 58.1MB in the beginning and 161.7MB in the end (delta: -103.6MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=7, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=7, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=7, counter=0, r=-3, R=2, u=5, v=1] [L34] EXPR counter++ VAL [A=7, counter=1, counter++=0, r=-3, R=2, u=5, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=1, r=-3, R=2, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=7, counter=1, R=2, r=-3, u=5, v=1] [L39] EXPR counter++ VAL [A=7, counter=2, counter++=1, R=2, r=-3, u=5, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=2, r=-3, R=2, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [A=7, counter=2, R=2, r=-3, u=5, v=1] [L47] EXPR counter++ VAL [A=7, counter=3, counter++=2, R=2, r=-3, u=5, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=3, R=2, r=-3, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=7, counter=3, R=2, r=2, u=7, v=1] [L47] EXPR counter++ VAL [A=7, counter=4, counter++=3, r=2, R=2, u=7, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=4, r=2, R=2, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [A=7, counter=4, r=2, R=2, u=7, v=1] [L34] EXPR counter++ VAL [A=7, counter=5, counter++=4, r=2, R=2, u=7, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=5, R=2, r=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=7, counter=5, r=2, R=2, u=7, v=1] [L39] EXPR counter++ VAL [A=7, counter=6, counter++=5, r=2, R=2, u=7, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=6, R=2, r=2, u=7, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=7, counter=6, R=2, r=1, u=7, v=3] [L39] EXPR counter++ VAL [A=7, counter=7, counter++=6, R=2, r=1, u=7, v=3] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=7, r=1, R=2, u=7, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=7, counter=7, r=-2, R=2, u=7, v=5] [L39] EXPR counter++ VAL [A=7, counter=8, counter++=7, R=2, r=-2, u=7, v=5] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=8, R=2, r=-2, u=7, v=5] [L41] COND TRUE !(r > 0) VAL [A=7, counter=8, r=-2, R=2, u=7, v=5] [L47] EXPR counter++ VAL [A=7, counter=9, counter++=8, r=-2, R=2, u=7, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=9, r=-2, R=2, u=7, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=7, counter=9, R=2, r=5, u=9, v=5] [L47] EXPR counter++ VAL [A=7, counter=10, counter++=9, R=2, r=5, u=9, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=7, counter=10, R=2, r=5, u=9, v=5] [L49] COND TRUE !(r < 0) VAL [A=7, counter=10, R=2, r=5, u=9, v=5] [L34] EXPR counter++ VAL [A=7, counter=11, counter++=10, R=2, r=5, u=9, v=5] [L34] COND FALSE !(counter++<10) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=11] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 20.8s, OverallIterations: 14, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 850 SdHoareTripleChecker+Valid, 10.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 836 mSDsluCounter, 2000 SdHoareTripleChecker+Invalid, 10.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1442 mSDsCounter, 373 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 896 IncrementalHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 373 mSolverCounterUnsat, 558 mSDtfsCounter, 896 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1073 GetRequests, 933 SyntacticMatches, 19 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=344occurred in iteration=12, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 13 MinimizatonAttempts, 89 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 693 NumberOfCodeBlocks, 693 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1037 ConstructedInterpolants, 0 QuantifiedInterpolants, 2387 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1619 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 934/1396 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-18 21:04:26,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15babeef-f00b-4a79-84a7-a689467984f5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE