./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a --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 a7db00fa220927f51e1e342e06102a5d28a1c61268049ef86f9068e213c9adb5 --- 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-b5237d8 [2022-11-21 17:03:45,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:03:45,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:03:45,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:03:45,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:03:45,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:03:45,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:03:45,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:03:45,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:03:45,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:03:45,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:03:45,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:03:45,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:03:45,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:03:45,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:03:45,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:03:45,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:03:45,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:03:45,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:03:45,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:03:45,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:03:45,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:03:45,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:03:45,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:03:45,899 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:03:45,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:03:45,902 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:03:45,903 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:03:45,904 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:03:45,905 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:03:45,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:03:45,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:03:45,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:03:45,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:03:45,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:03:45,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:03:45,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:03:45,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:03:45,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:03:45,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:03:45,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:03:45,917 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:03:45,957 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:03:45,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:03:45,958 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:03:45,958 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:03:45,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:03:45,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:03:45,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:03:45,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:03:45,961 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:03:45,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:03:45,962 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:03:45,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:03:45,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:03:45,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:03:45,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:03:45,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:03:45,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:03:45,964 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:03:45,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:03:45,964 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:03:45,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:03:45,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:03:45,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:03:45,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:03:45,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:03:45,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:03:45,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:03:45,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:03:45,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:03:45,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:03:45,969 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:03:45,969 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:03:45,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:03:45,970 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_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7db00fa220927f51e1e342e06102a5d28a1c61268049ef86f9068e213c9adb5 [2022-11-21 17:03:46,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:03:46,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:03:46,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:03:46,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:03:46,277 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:03:46,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c [2022-11-21 17:03:49,377 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:03:49,606 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:03:49,606 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c [2022-11-21 17:03:49,613 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/data/322a021b6/7ad6a41303ea40baa7a9eacc664aa3c9/FLAG1f2f8acbd [2022-11-21 17:03:49,634 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/data/322a021b6/7ad6a41303ea40baa7a9eacc664aa3c9 [2022-11-21 17:03:49,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:03:49,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:03:49,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:03:49,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:03:49,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:03:49,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712c5ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49, skipping insertion in model container [2022-11-21 17:03:49,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:03:49,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:03:49,805 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c[458,471] [2022-11-21 17:03:49,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:03:49,832 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:03:49,844 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c[458,471] [2022-11-21 17:03:49,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:03:49,865 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:03:49,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49 WrapperNode [2022-11-21 17:03:49,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:03:49,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:03:49,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:03:49,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:03:49,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,902 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-11-21 17:03:49,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:03:49,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:03:49,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:03:49,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:03:49,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,934 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:03:49,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:03:49,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:03:49,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:03:49,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (1/1) ... [2022-11-21 17:03:49,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:03:49,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:49,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:03:49,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:03:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:03:50,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-21 17:03:50,013 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-21 17:03:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:03:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:03:50,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:03:50,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 17:03:50,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 17:03:50,072 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:03:50,074 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:03:50,194 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:03:50,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:03:50,201 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 17:03:50,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:03:50 BoogieIcfgContainer [2022-11-21 17:03:50,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:03:50,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:03:50,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:03:50,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:03:50,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:03:49" (1/3) ... [2022-11-21 17:03:50,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1feab809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:03:50, skipping insertion in model container [2022-11-21 17:03:50,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:03:49" (2/3) ... [2022-11-21 17:03:50,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1feab809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:03:50, skipping insertion in model container [2022-11-21 17:03:50,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:03:50" (3/3) ... [2022-11-21 17:03:50,213 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound50.c [2022-11-21 17:03:50,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:03:50,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:03:50,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:03:50,291 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;@30cb23a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:03:50,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 17:03:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 17:03:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:03:50,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:03:50,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:50,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:03:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:50,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2022-11-21 17:03:50,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626326780] [2022-11-21 17:03:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:50,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:50,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:50,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626326780] [2022-11-21 17:03:50,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-21 17:03:50,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283255021] [2022-11-21 17:03:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:50,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:50,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:50,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:03:50,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:03:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-21 17:03:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 17:03:50,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:03:50,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283255021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:50,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:50,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:03:50,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802504991] [2022-11-21 17:03:50,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:50,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:03:50,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:03:50,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:03:50,706 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2022-11-21 17:03:50,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:03:50,757 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2022-11-21 17:03:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:03:50,759 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 [2022-11-21 17:03:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:03:50,766 INFO L225 Difference]: With dead ends: 45 [2022-11-21 17:03:50,776 INFO L226 Difference]: Without dead ends: 20 [2022-11-21 17:03:50,780 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 [2022-11-21 17:03:50,784 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2022-11-21 17:03:50,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:03:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-21 17:03:50,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-21 17:03:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-21 17:03:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-21 17:03:50,843 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2022-11-21 17:03:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:03:50,844 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-21 17:03:50,845 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) [2022-11-21 17:03:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-21 17:03:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 17:03:50,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:03:50,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:50,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:03:51,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:51,057 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:03:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:51,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2022-11-21 17:03:51,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:51,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189681425] [2022-11-21 17:03:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:51,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:51,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:03:51,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533697579] [2022-11-21 17:03:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:51,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:51,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:03:51,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:03:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 17:03:51,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-21 17:03:51,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:03:51,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189681425] [2022-11-21 17:03:51,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:03:51,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533697579] [2022-11-21 17:03:51,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533697579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:03:51,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:03:51,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 17:03:51,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425431454] [2022-11-21 17:03:51,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:03:51,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:03:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 17:03:51,286 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-21 17:03:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:03:51,353 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-21 17:03:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 17:03:51,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2022-11-21 17:03:51,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:03:51,356 INFO L225 Difference]: With dead ends: 31 [2022-11-21 17:03:51,358 INFO L226 Difference]: Without dead ends: 27 [2022-11-21 17:03:51,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:03:51,360 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:03:51,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 17:03:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-21 17:03:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-21 17:03:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 17:03:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-21 17:03:51,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-11-21 17:03:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:03:51,379 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-21 17:03:51,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-21 17:03:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-21 17:03:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 17:03:51,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:03:51,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:51,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:03:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:51,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:03:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2022-11-21 17:03:51,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:51,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973692513] [2022-11-21 17:03:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:51,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:03:51,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492315774] [2022-11-21 17:03:51,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:51,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:51,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:51,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:03:51,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:03:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:51,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 17:03:51,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:03:51,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:03:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 17:03:52,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973692513] [2022-11-21 17:03:52,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:03:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492315774] [2022-11-21 17:03:52,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492315774] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 17:03:52,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:03:52,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-21 17:03:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685738792] [2022-11-21 17:03:52,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:03:52,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 17:03:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:52,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 17:03:52,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-21 17:03:52,027 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:03:52,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:03:52,124 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-11-21 17:03:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:03:52,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-21 17:03:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:03:52,127 INFO L225 Difference]: With dead ends: 33 [2022-11-21 17:03:52,128 INFO L226 Difference]: Without dead ends: 29 [2022-11-21 17:03:52,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:03:52,129 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:03:52,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 58 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:03:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-21 17:03:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-21 17:03:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-21 17:03:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-21 17:03:52,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-11-21 17:03:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:03:52,150 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-21 17:03:52,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-21 17:03:52,150 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-21 17:03:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 17:03:52,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:03:52,152 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:03:52,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:03:52,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:52,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:03:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:03:52,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2022-11-21 17:03:52,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:03:52,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085006603] [2022-11-21 17:03:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:52,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:03:52,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:03:52,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890058804] [2022-11-21 17:03:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:03:52,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:03:52,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:03:52,409 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:03:52,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:03:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:03:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 17:03:52,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:03:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 17:03:52,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:03:56,847 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-21 17:04:19,047 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))))) is different from true [2022-11-21 17:04:37,160 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-21 17:04:41,195 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-21 17:04:49,284 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-21 17:04:51,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:04:51,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085006603] [2022-11-21 17:04:51,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:04:51,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890058804] [2022-11-21 17:04:51,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890058804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:04:51,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:04:51,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-21 17:04:51,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162336682] [2022-11-21 17:04:51,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:04:51,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 17:04:51,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:04:51,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 17:04:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=92, Unknown=5, NotChecked=110, Total=240 [2022-11-21 17:04:51,340 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-21 17:04:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:51,531 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-21 17:04:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 17:04:51,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2022-11-21 17:04:51,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:51,532 INFO L225 Difference]: With dead ends: 38 [2022-11-21 17:04:51,532 INFO L226 Difference]: Without dead ends: 32 [2022-11-21 17:04:51,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=51, Invalid=146, Unknown=5, NotChecked=140, Total=342 [2022-11-21 17:04:51,534 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:51,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:04:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-21 17:04:51,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-21 17:04:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 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) [2022-11-21 17:04:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-21 17:04:51,544 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2022-11-21 17:04:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:51,545 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-21 17:04:51,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-21 17:04:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-21 17:04:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 17:04:51,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:51,546 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:51,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:04:51,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:04:51,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2022-11-21 17:04:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:04:51,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68783835] [2022-11-21 17:04:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:51,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:04:51,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:04:51,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607775360] [2022-11-21 17:04:51,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:04:51,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:04:51,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:04:51,780 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:04:51,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 17:04:51,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:04:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:04:51,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 17:04:51,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:04:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-21 17:04:52,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:04:56,300 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-21 17:04:56,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:04:56,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68783835] [2022-11-21 17:04:56,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:04:56,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607775360] [2022-11-21 17:04:56,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607775360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:04:56,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:04:56,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-21 17:04:56,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061321656] [2022-11-21 17:04:56,304 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:04:56,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:04:56,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:04:56,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:04:56,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-11-21 17:04:56,305 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-21 17:04:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:56,497 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-21 17:04:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 17:04:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-11-21 17:04:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:56,499 INFO L225 Difference]: With dead ends: 41 [2022-11-21 17:04:56,499 INFO L226 Difference]: Without dead ends: 35 [2022-11-21 17:04:56,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2022-11-21 17:04:56,501 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:56,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 127 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 17:04:56,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-21 17:04:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-21 17:04:56,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-21 17:04:56,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-21 17:04:56,512 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2022-11-21 17:04:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:56,513 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-21 17:04:56,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-21 17:04:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-21 17:04:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 17:04:56,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:56,515 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:56,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 17:04:56,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:04:56,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash 173594938, now seen corresponding path program 3 times [2022-11-21 17:04:56,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:04:56,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676940479] [2022-11-21 17:04:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:04:56,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:04:56,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327864472] [2022-11-21 17:04:56,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:04:56,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:04:56,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:04:56,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:04:56,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:04:57,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 17:04:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:04:57,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 17:04:57,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:04:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-21 17:04:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:04:57,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:04:57,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676940479] [2022-11-21 17:04:57,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:04:57,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327864472] [2022-11-21 17:04:57,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327864472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:04:57,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:04:57,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-21 17:04:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215841556] [2022-11-21 17:04:57,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:04:57,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:04:57,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:04:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:04:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:04:57,695 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-21 17:04:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:57,922 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-21 17:04:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 17:04:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2022-11-21 17:04:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:57,925 INFO L225 Difference]: With dead ends: 44 [2022-11-21 17:04:57,925 INFO L226 Difference]: Without dead ends: 38 [2022-11-21 17:04:57,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:04:57,929 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:57,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:04:57,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-21 17:04:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-21 17:04:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-21 17:04:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-21 17:04:57,950 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2022-11-21 17:04:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:57,951 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-21 17:04:57,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-21 17:04:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-21 17:04:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-21 17:04:57,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:57,955 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:57,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 17:04:58,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:04:58,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:58,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1013596503, now seen corresponding path program 4 times [2022-11-21 17:04:58,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:04:58,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046609180] [2022-11-21 17:04:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:04:58,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:04:58,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203899988] [2022-11-21 17:04:58,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:04:58,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:04:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:04:58,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:04:58,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 17:04:58,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:04:58,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:04:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 17:04:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:04:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-21 17:04:58,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:04:58,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:04:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046609180] [2022-11-21 17:04:58,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:04:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203899988] [2022-11-21 17:04:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203899988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:04:58,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:04:58,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-21 17:04:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115682100] [2022-11-21 17:04:58,862 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:04:58,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 17:04:58,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:04:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 17:04:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:04:58,864 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-21 17:04:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:04:59,074 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-21 17:04:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 17:04:59,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 57 [2022-11-21 17:04:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:04:59,076 INFO L225 Difference]: With dead ends: 47 [2022-11-21 17:04:59,076 INFO L226 Difference]: Without dead ends: 41 [2022-11-21 17:04:59,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:04:59,077 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 17:04:59,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 192 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 17:04:59,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-21 17:04:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-21 17:04:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-21 17:04:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-21 17:04:59,090 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2022-11-21 17:04:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:04:59,090 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-21 17:04:59,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-21 17:04:59,091 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-21 17:04:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-21 17:04:59,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:04:59,092 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:04:59,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-21 17:04:59,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 17:04:59,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:04:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:04:59,298 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 5 times [2022-11-21 17:04:59,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:04:59,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607352031] [2022-11-21 17:04:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:04:59,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:04:59,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:04:59,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628550084] [2022-11-21 17:04:59,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 17:04:59,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:04:59,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:04:59,315 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:04:59,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 17:05:20,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-21 17:05:20,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:05:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 17:05:20,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-21 17:05:20,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:20,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:20,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607352031] [2022-11-21 17:05:20,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:05:20,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628550084] [2022-11-21 17:05:20,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628550084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:20,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:05:20,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-21 17:05:20,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256464987] [2022-11-21 17:05:20,898 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:20,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 17:05:20,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:20,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 17:05:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-21 17:05:20,899 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-21 17:05:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:21,248 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-21 17:05:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:05:21,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2022-11-21 17:05:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:21,250 INFO L225 Difference]: With dead ends: 50 [2022-11-21 17:05:21,250 INFO L226 Difference]: Without dead ends: 44 [2022-11-21 17:05:21,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:05:21,251 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:21,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 205 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:05:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-21 17:05:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-21 17:05:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-21 17:05:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-21 17:05:21,263 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2022-11-21 17:05:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:21,264 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-21 17:05:21,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-21 17:05:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-21 17:05:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-21 17:05:21,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:21,265 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:21,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:21,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:21,477 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:05:21,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:21,478 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 6 times [2022-11-21 17:05:21,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:21,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104510225] [2022-11-21 17:05:21,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:21,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:21,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:05:21,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26431474] [2022-11-21 17:05:21,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 17:05:21,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:21,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:21,503 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:21,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 17:05:25,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-21 17:05:25,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:05:25,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-21 17:05:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:25,980 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 21 proven. 79 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-21 17:05:25,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:05:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104510225] [2022-11-21 17:05:26,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:05:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26431474] [2022-11-21 17:05:26,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26431474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:05:26,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:05:26,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-21 17:05:26,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34511214] [2022-11-21 17:05:26,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:05:26,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 17:05:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:05:26,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 17:05:26,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-21 17:05:26,462 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-21 17:05:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:05:26,845 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-11-21 17:05:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 17:05:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 71 [2022-11-21 17:05:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:05:26,847 INFO L225 Difference]: With dead ends: 53 [2022-11-21 17:05:26,847 INFO L226 Difference]: Without dead ends: 47 [2022-11-21 17:05:26,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:05:26,848 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:05:26,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 235 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:05:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-21 17:05:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-21 17:05:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-21 17:05:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-21 17:05:26,911 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2022-11-21 17:05:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:05:26,911 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-21 17:05:26,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-21 17:05:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-21 17:05:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-21 17:05:26,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:05:26,915 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:05:26,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 17:05:27,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 17:05:27,126 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:05:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:05:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 416422906, now seen corresponding path program 7 times [2022-11-21 17:05:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:05:27,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7314339] [2022-11-21 17:05:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:05:27,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:05:27,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:05:27,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740283534] [2022-11-21 17:05:27,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 17:05:27,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:05:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:05:27,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:05:27,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 17:05:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:05:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-21 17:05:33,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:05:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 41 proven. 85 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-21 17:05:34,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:05:38,150 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-21 17:05:44,335 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-21 17:06:00,370 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 29)) 30) 0)))) is different from true [2022-11-21 17:06:18,429 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_69| 29)) 30) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-21 17:06:44,599 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-21 17:06:46,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7314339] [2022-11-21 17:06:46,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:06:46,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740283534] [2022-11-21 17:06:46,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740283534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:06:46,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:06:46,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-21 17:06:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562131128] [2022-11-21 17:06:46,656 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:46,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 17:06:46,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:46,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 17:06:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=265, Unknown=8, NotChecked=140, Total=462 [2022-11-21 17:06:46,671 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-21 17:06:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:06:47,139 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-21 17:06:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 17:06:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 78 [2022-11-21 17:06:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:06:47,141 INFO L225 Difference]: With dead ends: 56 [2022-11-21 17:06:47,141 INFO L226 Difference]: Without dead ends: 50 [2022-11-21 17:06:47,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=68, Invalid=360, Unknown=8, NotChecked=164, Total=600 [2022-11-21 17:06:47,142 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:06:47,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 267 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:06:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-21 17:06:47,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-21 17:06:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-21 17:06:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-11-21 17:06:47,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2022-11-21 17:06:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:06:47,156 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-11-21 17:06:47,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-21 17:06:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-11-21 17:06:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-21 17:06:47,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:06:47,158 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:06:47,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-21 17:06:47,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 17:06:47,367 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:06:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1706793321, now seen corresponding path program 8 times [2022-11-21 17:06:47,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:47,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795636267] [2022-11-21 17:06:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:47,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:06:47,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626589654] [2022-11-21 17:06:47,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:06:47,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:47,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:47,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:47,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 17:06:52,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:06:52,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:06:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-21 17:06:52,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:06:53,309 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 23 proven. 108 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-21 17:06:53,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:06:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-21 17:06:54,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:06:54,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795636267] [2022-11-21 17:06:54,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:06:54,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626589654] [2022-11-21 17:06:54,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626589654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:06:54,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:06:54,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-11-21 17:06:54,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243061697] [2022-11-21 17:06:54,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:06:54,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 17:06:54,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:06:54,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 17:06:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-11-21 17:06:54,015 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 29 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 21 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-21 17:06:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:06:56,609 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2022-11-21 17:06:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 17:06:56,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 21 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) Word has length 85 [2022-11-21 17:06:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:06:56,611 INFO L225 Difference]: With dead ends: 87 [2022-11-21 17:06:56,611 INFO L226 Difference]: Without dead ends: 79 [2022-11-21 17:06:56,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2022-11-21 17:06:56,613 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 98 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 17:06:56,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 417 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 17:06:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-21 17:06:56,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-11-21 17:06:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-21 17:06:56,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-11-21 17:06:56,652 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 85 [2022-11-21 17:06:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:06:56,652 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-11-21 17:06:56,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 21 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-21 17:06:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-11-21 17:06:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-21 17:06:56,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:06:56,655 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:06:56,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 17:06:56,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 17:06:56,864 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:06:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:06:56,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1681090266, now seen corresponding path program 9 times [2022-11-21 17:06:56,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:06:56,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890936159] [2022-11-21 17:06:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:06:56,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:06:56,877 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:06:56,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641295832] [2022-11-21 17:06:56,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:06:56,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:06:56,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:06:56,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:06:56,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11dbb362-c09c-4e6b-9de2-b5ed3bb8f814/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process