./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/ps4-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/ps4-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef01badb7f90b6597aa83d48583be40b7afc9a4c054f915d626bd89be70c7009 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 21:05:41,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:05:41,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:05:42,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:05:42,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:05:42,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:05:42,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:05:42,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:05:42,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:05:42,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:05:42,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:05:42,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:05:42,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:05:42,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:05:42,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:05:42,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:05:42,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:05:42,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:05:42,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:05:42,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:05:42,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:05:42,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:05:42,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:05:42,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:05:42,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:05:42,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:05:42,095 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:05:42,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:05:42,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:05:42,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:05:42,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:05:42,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:05:42,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:05:42,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:05:42,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:05:42,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:05:42,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:05:42,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:05:42,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:05:42,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:05:42,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:05:42,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 21:05:42,155 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:05:42,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:05:42,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:05:42,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:05:42,157 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:05:42,157 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:05:42,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:05:42,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:05:42,158 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:05:42,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:05:42,160 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:05:42,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:05:42,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:05:42,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:05:42,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:05:42,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:05:42,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:05:42,162 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:05:42,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:05:42,162 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:05:42,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:05:42,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:05:42,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:05:42,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:05:42,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:05:42,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:05:42,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:05:42,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:05:42,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:05:42,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:05:42,166 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:05:42,166 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:05:42,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:05:42,167 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_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef01badb7f90b6597aa83d48583be40b7afc9a4c054f915d626bd89be70c7009 [2022-11-18 21:05:42,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:05:42,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:05:42,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:05:42,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:05:42,521 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:05:42,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench/ps4-ll.c [2022-11-18 21:05:42,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/data/e0af3722d/1dc4163bb3fc4352b5edde8e33392a27/FLAG73eb19dd0 [2022-11-18 21:05:43,109 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:05:43,110 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/sv-benchmarks/c/nla-digbench/ps4-ll.c [2022-11-18 21:05:43,116 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/data/e0af3722d/1dc4163bb3fc4352b5edde8e33392a27/FLAG73eb19dd0 [2022-11-18 21:05:43,511 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/data/e0af3722d/1dc4163bb3fc4352b5edde8e33392a27 [2022-11-18 21:05:43,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:05:43,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:05:43,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:05:43,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:05:43,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:05:43,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a500e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43, skipping insertion in model container [2022-11-18 21:05:43,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:05:43,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:05:43,787 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/sv-benchmarks/c/nla-digbench/ps4-ll.c[458,471] [2022-11-18 21:05:43,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:05:43,815 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:05:43,829 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/sv-benchmarks/c/nla-digbench/ps4-ll.c[458,471] [2022-11-18 21:05:43,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:05:43,849 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:05:43,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43 WrapperNode [2022-11-18 21:05:43,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:05:43,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:05:43,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:05:43,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:05:43,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,877 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2022-11-18 21:05:43,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:05:43,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:05:43,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:05:43,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:05:43,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:05:43,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:05:43,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:05:43,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:05:43,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (1/1) ... [2022-11-18 21:05:43,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:05:43,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:43,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:05:43,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:05:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:05:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:05:43,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:05:43,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:05:43,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 21:05:43,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 21:05:44,034 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:05:44,036 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:05:44,154 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:05:44,159 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:05:44,160 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 21:05:44,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:05:44 BoogieIcfgContainer [2022-11-18 21:05:44,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:05:44,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:05:44,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:05:44,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:05:44,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:05:43" (1/3) ... [2022-11-18 21:05:44,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1413f3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:05:44, skipping insertion in model container [2022-11-18 21:05:44,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:05:43" (2/3) ... [2022-11-18 21:05:44,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1413f3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:05:44, skipping insertion in model container [2022-11-18 21:05:44,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:05:44" (3/3) ... [2022-11-18 21:05:44,170 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll.c [2022-11-18 21:05:44,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:05:44,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 21:05:44,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:05:44,244 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;@2a7f7eca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:05:44,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 21:05:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 21:05:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 21:05:44,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:44,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:44,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:05:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1818834085, now seen corresponding path program 1 times [2022-11-18 21:05:44,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:44,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257347869] [2022-11-18 21:05:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:44,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:44,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:44,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257347869] [2022-11-18 21:05:44,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 21:05:44,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552533148] [2022-11-18 21:05:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:44,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:44,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:44,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:44,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:05:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:44,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 21:05:44,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:44,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:44,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552533148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:44,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:44,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:05:44,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579344359] [2022-11-18 21:05:44,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 21:05:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:44,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 21:05:44,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:05:44,587 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:44,606 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2022-11-18 21:05:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 21:05:44,608 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 21:05:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:44,616 INFO L225 Difference]: With dead ends: 32 [2022-11-18 21:05:44,617 INFO L226 Difference]: Without dead ends: 13 [2022-11-18 21:05:44,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 21:05:44,624 INFO L413 NwaCegarLoop]: 19 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, 19 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:44,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:05:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-18 21:05:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-18 21:05:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:05:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-18 21:05:44,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-11-18 21:05:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:44,665 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-18 21:05:44,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-18 21:05:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 21:05:44,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:44,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:44,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:44,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 21:05:44,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:05:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1811386335, now seen corresponding path program 1 times [2022-11-18 21:05:44,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:44,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072604602] [2022-11-18 21:05:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:44,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:05:44,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943801920] [2022-11-18 21:05:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:44,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:44,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:44,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:05:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 21:05:44,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:45,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:05:45,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:45,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072604602] [2022-11-18 21:05:45,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:05:45,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943801920] [2022-11-18 21:05:45,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943801920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:45,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:45,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:05:45,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54362395] [2022-11-18 21:05:45,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:45,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:45,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:45,070 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:45,129 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-18 21:05:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:05:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 21:05:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:45,130 INFO L225 Difference]: With dead ends: 24 [2022-11-18 21:05:45,130 INFO L226 Difference]: Without dead ends: 20 [2022-11-18 21:05:45,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:05:45,132 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:45,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:05:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-18 21:05:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-18 21:05:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 21:05:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-18 21:05:45,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 7 [2022-11-18 21:05:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:45,141 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-18 21:05:45,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-18 21:05:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:05:45,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:45,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:45,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:45,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:45,347 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:05:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:45,348 INFO L85 PathProgramCache]: Analyzing trace with hash -555889191, now seen corresponding path program 1 times [2022-11-18 21:05:45,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:45,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480625598] [2022-11-18 21:05:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:45,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:45,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:05:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278565703] [2022-11-18 21:05:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:45,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:45,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:45,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:45,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:05:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:45,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:05:45,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:45,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:45,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:45,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480625598] [2022-11-18 21:05:45,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:05:45,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278565703] [2022-11-18 21:05:45,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278565703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:45,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:05:45,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2022-11-18 21:05:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139366412] [2022-11-18 21:05:45,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:45,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:05:45,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:05:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:05:45,907 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:05:46,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:46,100 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-18 21:05:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:05:46,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-18 21:05:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:46,102 INFO L225 Difference]: With dead ends: 31 [2022-11-18 21:05:46,102 INFO L226 Difference]: Without dead ends: 25 [2022-11-18 21:05:46,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:05:46,104 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:46,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 40 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-18 21:05:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-11-18 21:05:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:05:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-11-18 21:05:46,113 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2022-11-18 21:05:46,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:46,114 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-11-18 21:05:46,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:05:46,114 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-11-18 21:05:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 21:05:46,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:46,115 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:46,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:46,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:46,320 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:05:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash 219170934, now seen corresponding path program 1 times [2022-11-18 21:05:46,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:46,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319495441] [2022-11-18 21:05:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:46,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:05:46,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079967604] [2022-11-18 21:05:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:46,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:46,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:46,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:05:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:46,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:05:46,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:46,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:50,941 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:05:50,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:50,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319495441] [2022-11-18 21:05:50,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:05:50,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079967604] [2022-11-18 21:05:50,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079967604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:50,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:05:50,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-18 21:05:50,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436529803] [2022-11-18 21:05:50,945 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:50,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 21:05:50,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 21:05:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=125, Unknown=1, NotChecked=22, Total=182 [2022-11-18 21:05:50,947 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:05:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:51,104 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-11-18 21:05:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:05:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-11-18 21:05:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:51,106 INFO L225 Difference]: With dead ends: 29 [2022-11-18 21:05:51,106 INFO L226 Difference]: Without dead ends: 24 [2022-11-18 21:05:51,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=53, Invalid=190, Unknown=1, NotChecked=28, Total=272 [2022-11-18 21:05:51,107 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:51,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-18 21:05:51,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-18 21:05:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 21:05:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-11-18 21:05:51,124 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2022-11-18 21:05:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:51,125 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-11-18 21:05:51,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 21:05:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-11-18 21:05:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 21:05:51,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:51,130 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:51,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:51,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:51,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:05:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:51,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1804341436, now seen corresponding path program 2 times [2022-11-18 21:05:51,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:51,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415141938] [2022-11-18 21:05:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:51,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:51,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:05:51,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919379042] [2022-11-18 21:05:51,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:05:51,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:51,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:51,354 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:51,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:05:51,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:05:51,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 21:05:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:05:51,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:55,795 WARN L837 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) |c_ULTIMATE.start_main_~k~0#1|)) (not (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:06:11,919 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_8| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14|) 1) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_8|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| 3)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-11-18 21:06:30,021 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_8| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14|) 1) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_8|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_14| 3)) 4) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 21:06:36,091 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 1)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4) 4) (+ (* 2 |ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|))) (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:06:38,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:06:38,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415141938] [2022-11-18 21:06:38,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:06:38,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919379042] [2022-11-18 21:06:38,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919379042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:06:38,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:06:38,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-18 21:06:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208437510] [2022-11-18 21:06:38,131 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:38,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:06:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:38,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=150, Unknown=4, NotChecked=108, Total=306 [2022-11-18 21:06:38,132 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 21:06:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:38,327 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-11-18 21:06:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:06:38,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-11-18 21:06:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:38,328 INFO L225 Difference]: With dead ends: 32 [2022-11-18 21:06:38,329 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 21:06:38,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=63, Invalid=221, Unknown=4, NotChecked=132, Total=420 [2022-11-18 21:06:38,330 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:38,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:06:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 21:06:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-18 21:06:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 21:06:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-11-18 21:06:38,338 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2022-11-18 21:06:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:38,338 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-11-18 21:06:38,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 21:06:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-11-18 21:06:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 21:06:38,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:38,349 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:38,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:38,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:06:38,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:06:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:38,555 INFO L85 PathProgramCache]: Analyzing trace with hash 793873846, now seen corresponding path program 3 times [2022-11-18 21:06:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:06:38,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700658347] [2022-11-18 21:06:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:38,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:06:38,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:06:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97106760] [2022-11-18 21:06:38,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:06:38,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:06:38,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:06:38,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:06:38,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:06:38,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 21:06:38,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:38,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 21:06:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 21:06:38,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:12,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:12,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700658347] [2022-11-18 21:07:12,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:07:12,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97106760] [2022-11-18 21:07:12,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97106760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:12,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:07:12,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-18 21:07:12,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813284806] [2022-11-18 21:07:12,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:12,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:07:12,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:07:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=181, Unknown=13, NotChecked=0, Total=240 [2022-11-18 21:07:12,363 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-11-18 21:07:18,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:18,628 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-11-18 21:07:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 21:07:18,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) Word has length 34 [2022-11-18 21:07:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:18,630 INFO L225 Difference]: With dead ends: 35 [2022-11-18 21:07:18,630 INFO L226 Difference]: Without dead ends: 30 [2022-11-18 21:07:18,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=67, Invalid=259, Unknown=16, NotChecked=0, Total=342 [2022-11-18 21:07:18,631 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:18,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:07:18,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-18 21:07:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-18 21:07:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:07:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-18 21:07:18,645 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 34 [2022-11-18 21:07:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:18,651 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-18 21:07:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 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) [2022-11-18 21:07:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-18 21:07:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 21:07:18,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:18,653 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:18,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:18,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:18,854 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:07:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:18,854 INFO L85 PathProgramCache]: Analyzing trace with hash 395207548, now seen corresponding path program 4 times [2022-11-18 21:07:18,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:18,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046276299] [2022-11-18 21:07:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:18,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:18,863 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:07:18,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38212173] [2022-11-18 21:07:18,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:07:18,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:18,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:18,865 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:18,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:07:18,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:07:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 21:07:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 21:07:19,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:19,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:19,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046276299] [2022-11-18 21:07:19,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:07:19,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38212173] [2022-11-18 21:07:19,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38212173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:19,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:07:19,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-18 21:07:19,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755494] [2022-11-18 21:07:19,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:19,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:07:19,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:07:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:07:19,652 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:07:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:19,906 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-18 21:07:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 21:07:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 41 [2022-11-18 21:07:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:19,908 INFO L225 Difference]: With dead ends: 38 [2022-11-18 21:07:19,908 INFO L226 Difference]: Without dead ends: 33 [2022-11-18 21:07:19,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:07:19,909 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:19,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 90 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:07:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-18 21:07:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-18 21:07:19,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 21:07:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-18 21:07:19,920 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 41 [2022-11-18 21:07:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:19,921 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-18 21:07:19,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 21:07:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-18 21:07:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 21:07:19,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:19,922 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:19,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 21:07:20,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:20,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:07:20,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1716560630, now seen corresponding path program 5 times [2022-11-18 21:07:20,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:20,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162894265] [2022-11-18 21:07:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:20,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:20,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:07:20,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163934531] [2022-11-18 21:07:20,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:07:20,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:20,147 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:20,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 21:07:20,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 21:07:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:20,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 21:07:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 21:07:20,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:20,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:20,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162894265] [2022-11-18 21:07:20,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:07:20,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163934531] [2022-11-18 21:07:20,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163934531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:20,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:07:20,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-18 21:07:20,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472011479] [2022-11-18 21:07:20,892 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:20,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:07:20,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:20,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:07:20,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:07:20,894 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 21:07:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:21,210 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-18 21:07:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:07:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-11-18 21:07:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:21,212 INFO L225 Difference]: With dead ends: 41 [2022-11-18 21:07:21,212 INFO L226 Difference]: Without dead ends: 36 [2022-11-18 21:07:21,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:07:21,213 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:21,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 110 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:07:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-18 21:07:21,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-18 21:07:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 21:07:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-18 21:07:21,231 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 48 [2022-11-18 21:07:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:21,235 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-18 21:07:21,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 21:07:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-18 21:07:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 21:07:21,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:21,246 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:21,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:21,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 21:07:21,460 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:07:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1151919676, now seen corresponding path program 6 times [2022-11-18 21:07:21,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:21,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598924954] [2022-11-18 21:07:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:21,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:21,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:07:21,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637937484] [2022-11-18 21:07:21,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:07:21,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:21,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:21,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 21:07:21,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 21:07:21,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:21,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 21:07:21,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 21:07:21,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:22,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598924954] [2022-11-18 21:07:22,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:07:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637937484] [2022-11-18 21:07:22,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637937484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:22,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:07:22,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-18 21:07:22,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183289990] [2022-11-18 21:07:22,024 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:22,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:07:22,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:07:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:07:22,025 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 21:07:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:22,419 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-18 21:07:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 21:07:22,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-18 21:07:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:22,421 INFO L225 Difference]: With dead ends: 44 [2022-11-18 21:07:22,422 INFO L226 Difference]: Without dead ends: 39 [2022-11-18 21:07:22,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:07:22,423 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:22,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 142 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:07:22,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-18 21:07:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-18 21:07:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 21:07:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-11-18 21:07:22,448 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 55 [2022-11-18 21:07:22,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:22,449 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-11-18 21:07:22,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 21:07:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-11-18 21:07:22,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 21:07:22,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:22,452 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:22,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:22,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:22,658 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:07:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1772193846, now seen corresponding path program 7 times [2022-11-18 21:07:22,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:22,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985983513] [2022-11-18 21:07:22,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:22,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:22,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:07:22,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592294122] [2022-11-18 21:07:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:07:22,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:22,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:22,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:22,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:07:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:22,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 21:07:22,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-18 21:07:23,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:27,209 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:07:47,287 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_23| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_23|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| 3)) 4) 0)))) is different from true [2022-11-18 21:08:05,350 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_23| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_23|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_54| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 21:08:11,388 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:08:13,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:13,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985983513] [2022-11-18 21:08:13,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:13,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592294122] [2022-11-18 21:08:13,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592294122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:13,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:13,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-18 21:08:13,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003186938] [2022-11-18 21:08:13,418 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:13,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:08:13,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:08:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=269, Unknown=4, NotChecked=140, Total=462 [2022-11-18 21:08:13,419 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 21:08:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:13,829 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-18 21:08:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 21:08:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 62 [2022-11-18 21:08:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:13,831 INFO L225 Difference]: With dead ends: 47 [2022-11-18 21:08:13,831 INFO L226 Difference]: Without dead ends: 42 [2022-11-18 21:08:13,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=68, Invalid=364, Unknown=4, NotChecked=164, Total=600 [2022-11-18 21:08:13,832 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:13,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 156 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:08:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-18 21:08:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-18 21:08:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 21:08:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-11-18 21:08:13,848 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 62 [2022-11-18 21:08:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:13,848 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-11-18 21:08:13,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 21:08:13,849 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-11-18 21:08:13,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 21:08:13,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:13,850 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:13,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 21:08:14,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 21:08:14,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1288149244, now seen corresponding path program 8 times [2022-11-18 21:08:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528272012] [2022-11-18 21:08:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:14,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:14,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:14,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496699874] [2022-11-18 21:08:14,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:08:14,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:14,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:14,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 21:08:14,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:08:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:14,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 21:08:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 38 proven. 112 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-18 21:08:14,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:18,768 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:08:18,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528272012] [2022-11-18 21:08:18,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496699874] [2022-11-18 21:08:18,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496699874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:18,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:18,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-18 21:08:18,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190563457] [2022-11-18 21:08:18,771 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:18,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:08:18,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:18,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:08:18,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2022-11-18 21:08:18,773 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 21:08:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:19,213 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-18 21:08:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:08:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 69 [2022-11-18 21:08:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:19,214 INFO L225 Difference]: With dead ends: 50 [2022-11-18 21:08:19,215 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 21:08:19,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=74, Invalid=435, Unknown=1, NotChecked=42, Total=552 [2022-11-18 21:08:19,216 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:19,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 194 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:08:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 21:08:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-18 21:08:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 21:08:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-18 21:08:19,230 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 69 [2022-11-18 21:08:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:19,230 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-18 21:08:19,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 21:08:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-18 21:08:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-18 21:08:19,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:19,232 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:19,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:19,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 21:08:19,438 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 500710774, now seen corresponding path program 9 times [2022-11-18 21:08:19,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:19,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93006224] [2022-11-18 21:08:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:19,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:19,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:19,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053989984] [2022-11-18 21:08:19,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:08:19,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:19,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:19,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:19,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 21:08:19,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-18 21:08:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:19,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 21:08:19,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 25 proven. 157 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-18 21:08:20,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:20,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93006224] [2022-11-18 21:08:20,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:20,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053989984] [2022-11-18 21:08:20,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053989984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:20,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:20,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-18 21:08:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488024840] [2022-11-18 21:08:20,517 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:20,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 21:08:20,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 21:08:20,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:08:20,519 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 21:08:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:21,031 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-11-18 21:08:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 21:08:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 76 [2022-11-18 21:08:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:21,033 INFO L225 Difference]: With dead ends: 53 [2022-11-18 21:08:21,033 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 21:08:21,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:08:21,034 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:21,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 210 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:08:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 21:08:21,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-18 21:08:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 21:08:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-11-18 21:08:21,048 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 76 [2022-11-18 21:08:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:21,049 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-11-18 21:08:21,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 21:08:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-11-18 21:08:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 21:08:21,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:21,051 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:21,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:21,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 21:08:21,257 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:21,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1126794308, now seen corresponding path program 10 times [2022-11-18 21:08:21,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:21,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085145935] [2022-11-18 21:08:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:21,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:21,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:21,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883184236] [2022-11-18 21:08:21,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:08:21,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:21,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:21,279 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:21,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 21:08:21,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:08:21,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:21,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 21:08:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-18 21:08:21,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:22,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:22,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085145935] [2022-11-18 21:08:22,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:22,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883184236] [2022-11-18 21:08:22,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883184236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:22,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:22,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-18 21:08:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494997139] [2022-11-18 21:08:22,085 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 21:08:22,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 21:08:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:08:22,087 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 21:08:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:22,682 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-18 21:08:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 21:08:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 83 [2022-11-18 21:08:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:22,683 INFO L225 Difference]: With dead ends: 56 [2022-11-18 21:08:22,683 INFO L226 Difference]: Without dead ends: 51 [2022-11-18 21:08:22,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-11-18 21:08:22,684 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:22,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 254 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:08:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-18 21:08:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-18 21:08:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 21:08:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-11-18 21:08:22,699 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 83 [2022-11-18 21:08:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:22,699 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-11-18 21:08:22,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 21:08:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-11-18 21:08:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-18 21:08:22,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:22,701 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:22,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:22,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 21:08:22,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:22,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -729234762, now seen corresponding path program 11 times [2022-11-18 21:08:22,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:22,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13020679] [2022-11-18 21:08:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:22,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:22,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:22,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105452109] [2022-11-18 21:08:22,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:08:22,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:22,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:22,929 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:22,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 21:08:23,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-18 21:08:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:23,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 21:08:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 29 proven. 226 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 21:08:23,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:23,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13020679] [2022-11-18 21:08:23,936 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105452109] [2022-11-18 21:08:23,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105452109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:23,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:23,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-18 21:08:23,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776747128] [2022-11-18 21:08:23,937 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:23,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:08:23,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:23,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:08:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:08:23,938 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 21:08:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:24,523 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-11-18 21:08:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 21:08:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 90 [2022-11-18 21:08:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:24,524 INFO L225 Difference]: With dead ends: 59 [2022-11-18 21:08:24,524 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 21:08:24,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-11-18 21:08:24,526 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:24,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 272 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 21:08:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 21:08:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-18 21:08:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 21:08:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-11-18 21:08:24,539 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 90 [2022-11-18 21:08:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:24,539 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-11-18 21:08:24,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 21:08:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-11-18 21:08:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-18 21:08:24,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:24,541 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:24,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:24,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 21:08:24,747 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:24,747 INFO L85 PathProgramCache]: Analyzing trace with hash 348229244, now seen corresponding path program 12 times [2022-11-18 21:08:24,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:24,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354540593] [2022-11-18 21:08:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:24,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:24,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798007264] [2022-11-18 21:08:24,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:08:24,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:24,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:24,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:24,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 21:08:24,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-18 21:08:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:24,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 21:08:24,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 43 proven. 253 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-18 21:08:25,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:25,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:08:25,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354540593] [2022-11-18 21:08:25,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:08:25,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798007264] [2022-11-18 21:08:25,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798007264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:08:25,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:08:25,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-18 21:08:25,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877226495] [2022-11-18 21:08:25,624 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:25,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 21:08:25,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:08:25,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 21:08:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:08:25,626 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 21:08:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:26,274 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-11-18 21:08:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 21:08:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 97 [2022-11-18 21:08:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:26,275 INFO L225 Difference]: With dead ends: 62 [2022-11-18 21:08:26,276 INFO L226 Difference]: Without dead ends: 57 [2022-11-18 21:08:26,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:08:26,277 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:26,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 322 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 21:08:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-18 21:08:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-18 21:08:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 21:08:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-11-18 21:08:26,293 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 97 [2022-11-18 21:08:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:26,293 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-11-18 21:08:26,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 21:08:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-11-18 21:08:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-18 21:08:26,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:26,295 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:26,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:26,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:26,503 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:08:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:26,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1941497866, now seen corresponding path program 13 times [2022-11-18 21:08:26,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:08:26,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245289069] [2022-11-18 21:08:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:26,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:08:26,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:08:26,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190659763] [2022-11-18 21:08:26,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:08:26,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:08:26,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:08:26,514 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:08:26,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 21:08:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-18 21:08:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 66 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-11-18 21:08:27,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:31,233 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:08:47,307 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_135| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135|))))) is different from true [2022-11-18 21:09:05,366 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_135| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_41|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_135|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 21:09:11,402 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:09:13,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245289069] [2022-11-18 21:09:13,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190659763] [2022-11-18 21:09:13,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190659763] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:13,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:13,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-18 21:09:13,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142647816] [2022-11-18 21:09:13,428 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:13,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 21:09:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 21:09:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=503, Unknown=4, NotChecked=188, Total=756 [2022-11-18 21:09:13,430 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 21:09:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:14,159 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2022-11-18 21:09:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 21:09:14,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 104 [2022-11-18 21:09:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:14,161 INFO L225 Difference]: With dead ends: 65 [2022-11-18 21:09:14,161 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 21:09:14,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=80, Invalid=634, Unknown=4, NotChecked=212, Total=930 [2022-11-18 21:09:14,162 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:14,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 342 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 21:09:14,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 21:09:14,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-18 21:09:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 21:09:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-11-18 21:09:14,178 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 104 [2022-11-18 21:09:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:14,179 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-11-18 21:09:14,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 21:09:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-11-18 21:09:14,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-18 21:09:14,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:14,181 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:14,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:14,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 21:09:14,387 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2022387396, now seen corresponding path program 14 times [2022-11-18 21:09:14,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:14,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095706402] [2022-11-18 21:09:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:14,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:14,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:14,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862077389] [2022-11-18 21:09:14,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:09:14,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:14,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:14,410 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:14,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 21:09:14,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:09:14,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:14,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-18 21:09:14,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 68 proven. 319 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-18 21:09:15,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:19,636 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:09:19,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:19,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095706402] [2022-11-18 21:09:19,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862077389] [2022-11-18 21:09:19,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862077389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:19,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:19,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-18 21:09:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631934322] [2022-11-18 21:09:19,639 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 21:09:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 21:09:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=580, Unknown=1, NotChecked=48, Total=702 [2022-11-18 21:09:19,641 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 21:09:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:20,504 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-11-18 21:09:20,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 21:09:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 111 [2022-11-18 21:09:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:20,506 INFO L225 Difference]: With dead ends: 68 [2022-11-18 21:09:20,506 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 21:09:20,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=92, Invalid=723, Unknown=1, NotChecked=54, Total=870 [2022-11-18 21:09:20,507 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:20,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 398 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 21:09:20,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 21:09:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-18 21:09:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 21:09:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-11-18 21:09:20,523 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 111 [2022-11-18 21:09:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:20,524 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-11-18 21:09:20,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 21:09:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-11-18 21:09:20,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-18 21:09:20,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:20,526 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:20,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:20,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 21:09:20,731 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:20,731 INFO L85 PathProgramCache]: Analyzing trace with hash 816266550, now seen corresponding path program 15 times [2022-11-18 21:09:20,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:20,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226416860] [2022-11-18 21:09:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:20,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:20,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:20,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720422272] [2022-11-18 21:09:20,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:09:20,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:20,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:20,741 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:20,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 21:09:21,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-18 21:09:21,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:21,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-18 21:09:21,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 61 proven. 376 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-11-18 21:09:21,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:22,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:22,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226416860] [2022-11-18 21:09:22,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:22,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720422272] [2022-11-18 21:09:22,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720422272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:22,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:22,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-18 21:09:22,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089396] [2022-11-18 21:09:22,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:22,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 21:09:22,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:22,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 21:09:22,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:09:22,245 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 21:09:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:23,155 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2022-11-18 21:09:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 21:09:23,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 118 [2022-11-18 21:09:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:23,160 INFO L225 Difference]: With dead ends: 71 [2022-11-18 21:09:23,160 INFO L226 Difference]: Without dead ends: 66 [2022-11-18 21:09:23,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:09:23,162 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:23,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 439 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 21:09:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-18 21:09:23,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-18 21:09:23,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-18 21:09:23,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-11-18 21:09:23,177 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 118 [2022-11-18 21:09:23,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:23,178 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-11-18 21:09:23,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 21:09:23,178 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-11-18 21:09:23,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-18 21:09:23,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:23,180 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:23,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:23,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 21:09:23,389 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1159969796, now seen corresponding path program 16 times [2022-11-18 21:09:23,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:23,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008704202] [2022-11-18 21:09:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:23,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:23,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057067104] [2022-11-18 21:09:23,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:09:23,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:23,411 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:23,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 21:09:24,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:09:24,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-18 21:09:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 42 proven. 448 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-18 21:09:24,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:24,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008704202] [2022-11-18 21:09:24,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057067104] [2022-11-18 21:09:24,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057067104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:24,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:24,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-18 21:09:24,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378582639] [2022-11-18 21:09:24,770 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:24,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 21:09:24,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 21:09:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-11-18 21:09:24,772 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-18 21:09:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:25,738 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2022-11-18 21:09:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 21:09:25,739 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 125 [2022-11-18 21:09:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:25,740 INFO L225 Difference]: With dead ends: 74 [2022-11-18 21:09:25,740 INFO L226 Difference]: Without dead ends: 69 [2022-11-18 21:09:25,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2022-11-18 21:09:25,742 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:25,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 462 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 21:09:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-18 21:09:25,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-18 21:09:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 19 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-18 21:09:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2022-11-18 21:09:25,758 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 125 [2022-11-18 21:09:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:25,758 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2022-11-18 21:09:25,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-18 21:09:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2022-11-18 21:09:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-18 21:09:25,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:25,761 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:25,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:25,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:25,969 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash -633523594, now seen corresponding path program 17 times [2022-11-18 21:09:25,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:25,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715623095] [2022-11-18 21:09:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:25,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:25,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:26,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914446776] [2022-11-18 21:09:26,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:09:26,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:26,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:26,003 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:26,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 21:09:26,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-11-18 21:09:26,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-18 21:09:26,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 71 proven. 475 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-18 21:09:26,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:27,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:27,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715623095] [2022-11-18 21:09:27,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:27,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914446776] [2022-11-18 21:09:27,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914446776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:27,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:27,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-18 21:09:27,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12298038] [2022-11-18 21:09:27,171 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:27,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 21:09:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 21:09:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:09:27,172 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-18 21:09:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:28,215 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2022-11-18 21:09:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 21:09:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 132 [2022-11-18 21:09:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:28,216 INFO L225 Difference]: With dead ends: 77 [2022-11-18 21:09:28,216 INFO L226 Difference]: Without dead ends: 72 [2022-11-18 21:09:28,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-11-18 21:09:28,218 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:28,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 527 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 21:09:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-18 21:09:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-18 21:09:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-18 21:09:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2022-11-18 21:09:28,236 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 132 [2022-11-18 21:09:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:28,237 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2022-11-18 21:09:28,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 19 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-18 21:09:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2022-11-18 21:09:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-18 21:09:28,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:28,238 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:28,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:28,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:28,439 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2015107396, now seen corresponding path program 18 times [2022-11-18 21:09:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351978437] [2022-11-18 21:09:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:28,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112476256] [2022-11-18 21:09:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:09:28,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:28,450 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:28,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 21:09:29,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-11-18 21:09:29,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:29,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-18 21:09:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 58 proven. 547 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-11-18 21:09:30,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:30,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:09:30,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351978437] [2022-11-18 21:09:30,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:09:30,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112476256] [2022-11-18 21:09:30,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112476256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:09:30,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:09:30,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-11-18 21:09:30,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492687232] [2022-11-18 21:09:30,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:30,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 21:09:30,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:09:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 21:09:30,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:09:30,581 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-18 21:09:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:31,733 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2022-11-18 21:09:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 21:09:31,734 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 139 [2022-11-18 21:09:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:31,735 INFO L225 Difference]: With dead ends: 80 [2022-11-18 21:09:31,735 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 21:09:31,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 21:09:31,736 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:31,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 574 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:09:31,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 21:09:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-18 21:09:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 21 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-18 21:09:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2022-11-18 21:09:31,754 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 139 [2022-11-18 21:09:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:31,755 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2022-11-18 21:09:31,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-18 21:09:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2022-11-18 21:09:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-18 21:09:31,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:31,757 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:31,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-18 21:09:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:31,964 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:09:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:31,965 INFO L85 PathProgramCache]: Analyzing trace with hash 245168054, now seen corresponding path program 19 times [2022-11-18 21:09:31,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:09:31,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154462988] [2022-11-18 21:09:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:09:31,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:09:31,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:09:31,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200128808] [2022-11-18 21:09:31,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:09:31,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:09:31,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:09:31,974 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:09:31,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 21:09:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:32,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-18 21:09:32,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 96 proven. 571 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-18 21:09:32,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:25,156 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_252| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| 3)) 4) 0)))) is different from true [2022-11-18 21:10:43,204 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_252| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_59|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_252| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 21:10:49,238 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:10:51,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:51,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154462988] [2022-11-18 21:10:51,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:10:51,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200128808] [2022-11-18 21:10:51,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200128808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:51,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:51,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-18 21:10:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690523942] [2022-11-18 21:10:51,263 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:51,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 21:10:51,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:51,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 21:10:51,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=847, Unknown=17, NotChecked=180, Total=1122 [2022-11-18 21:10:51,264 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-18 21:10:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:52,496 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2022-11-18 21:10:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 21:10:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 146 [2022-11-18 21:10:52,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:52,498 INFO L225 Difference]: With dead ends: 83 [2022-11-18 21:10:52,498 INFO L226 Difference]: Without dead ends: 78 [2022-11-18 21:10:52,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=98, Invalid=1019, Unknown=17, NotChecked=198, Total=1332 [2022-11-18 21:10:52,499 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:52,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 623 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 21:10:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-18 21:10:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-18 21:10:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 22 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-18 21:10:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2022-11-18 21:10:52,518 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 146 [2022-11-18 21:10:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:52,519 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2022-11-18 21:10:52,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 21 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-18 21:10:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2022-11-18 21:10:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 21:10:52,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:52,521 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:52,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-18 21:10:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:52,727 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1166558852, now seen corresponding path program 20 times [2022-11-18 21:10:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:52,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019888365] [2022-11-18 21:10:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:52,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:52,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:10:52,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393966870] [2022-11-18 21:10:52,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:10:52,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:52,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:52,738 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:52,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 21:10:53,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:10:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:53,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-18 21:10:53,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 98 proven. 634 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2022-11-18 21:10:53,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:58,057 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:10:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:10:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019888365] [2022-11-18 21:10:58,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:10:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393966870] [2022-11-18 21:10:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393966870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:10:58,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:10:58,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-11-18 21:10:58,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586082054] [2022-11-18 21:10:58,060 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:58,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 21:10:58,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:10:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 21:10:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=904, Unknown=1, NotChecked=60, Total=1056 [2022-11-18 21:10:58,061 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-18 21:10:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:59,338 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-11-18 21:10:59,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 21:10:59,338 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 153 [2022-11-18 21:10:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:59,339 INFO L225 Difference]: With dead ends: 86 [2022-11-18 21:10:59,339 INFO L226 Difference]: Without dead ends: 81 [2022-11-18 21:10:59,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=110, Invalid=1083, Unknown=1, NotChecked=66, Total=1260 [2022-11-18 21:10:59,340 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 1818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:59,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 674 Invalid, 1818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 21:10:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-18 21:10:59,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-18 21:10:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 23 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-18 21:10:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2022-11-18 21:10:59,359 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 153 [2022-11-18 21:10:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:59,360 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2022-11-18 21:10:59,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-18 21:10:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2022-11-18 21:10:59,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-18 21:10:59,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:59,361 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:59,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:59,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 21:10:59,562 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:10:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash 5934326, now seen corresponding path program 21 times [2022-11-18 21:10:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:10:59,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032074992] [2022-11-18 21:10:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:59,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:10:59,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:10:59,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967163670] [2022-11-18 21:10:59,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:10:59,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:10:59,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:10:59,580 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:10:59,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 21:11:00,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-18 21:11:00,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:00,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-18 21:11:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 79 proven. 721 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-11-18 21:11:01,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:02,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:02,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032074992] [2022-11-18 21:11:02,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:11:02,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967163670] [2022-11-18 21:11:02,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967163670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:02,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:02,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-11-18 21:11:02,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496741874] [2022-11-18 21:11:02,012 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:02,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 21:11:02,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 21:11:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 21:11:02,014 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-18 21:11:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:03,485 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2022-11-18 21:11:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 21:11:03,486 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 160 [2022-11-18 21:11:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:03,487 INFO L225 Difference]: With dead ends: 89 [2022-11-18 21:11:03,487 INFO L226 Difference]: Without dead ends: 84 [2022-11-18 21:11:03,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 21:11:03,488 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 7 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:03,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 702 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 21:11:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-18 21:11:03,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-18 21:11:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 24 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-18 21:11:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-11-18 21:11:03,511 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 160 [2022-11-18 21:11:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:03,512 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-11-18 21:11:03,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-18 21:11:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-11-18 21:11:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-18 21:11:03,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:03,515 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:03,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-18 21:11:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:03,722 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash -779895748, now seen corresponding path program 22 times [2022-11-18 21:11:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:03,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975568231] [2022-11-18 21:11:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:03,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:03,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231512144] [2022-11-18 21:11:03,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:11:03,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:03,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:03,743 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:03,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 21:11:05,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:11:05,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-18 21:11:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 45 proven. 826 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-11-18 21:11:06,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:06,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:11:06,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975568231] [2022-11-18 21:11:06,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:11:06,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231512144] [2022-11-18 21:11:06,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231512144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:11:06,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:11:06,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-11-18 21:11:06,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411352280] [2022-11-18 21:11:06,364 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:06,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 21:11:06,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:11:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 21:11:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 21:11:06,366 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-18 21:11:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:07,929 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2022-11-18 21:11:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 21:11:07,930 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 167 [2022-11-18 21:11:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:07,931 INFO L225 Difference]: With dead ends: 92 [2022-11-18 21:11:07,931 INFO L226 Difference]: Without dead ends: 87 [2022-11-18 21:11:07,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 21:11:07,932 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:07,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 782 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 21:11:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-18 21:11:07,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-18 21:11:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 25 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-18 21:11:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-11-18 21:11:07,953 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 167 [2022-11-18 21:11:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:07,954 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-11-18 21:11:07,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-18 21:11:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-11-18 21:11:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 21:11:07,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:07,956 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:07,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:08,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 21:11:08,163 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:11:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:08,163 INFO L85 PathProgramCache]: Analyzing trace with hash -821431754, now seen corresponding path program 23 times [2022-11-18 21:11:08,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:11:08,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657326650] [2022-11-18 21:11:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:08,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:11:08,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:11:08,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769266950] [2022-11-18 21:11:08,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:11:08,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:11:08,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:11:08,174 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:11:08,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 21:12:42,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-18 21:12:42,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:42,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-18 21:12:42,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 98 proven. 847 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-11-18 21:12:43,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:43,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:12:43,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657326650] [2022-11-18 21:12:43,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:12:43,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769266950] [2022-11-18 21:12:43,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769266950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:12:43,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:12:43,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-11-18 21:12:43,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880738669] [2022-11-18 21:12:43,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:43,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 21:12:43,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:12:43,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 21:12:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 21:12:43,913 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-18 21:12:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:45,553 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2022-11-18 21:12:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 21:12:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 174 [2022-11-18 21:12:45,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:45,555 INFO L225 Difference]: With dead ends: 95 [2022-11-18 21:12:45,556 INFO L226 Difference]: Without dead ends: 90 [2022-11-18 21:12:45,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 21:12:45,557 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:45,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 812 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 21:12:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-18 21:12:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-18 21:12:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-18 21:12:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-11-18 21:12:45,585 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 174 [2022-11-18 21:12:45,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:45,585 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-11-18 21:12:45,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-18 21:12:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-11-18 21:12:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-18 21:12:45,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:45,587 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:45,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:45,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 21:12:45,788 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:12:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1091309828, now seen corresponding path program 24 times [2022-11-18 21:12:45,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:12:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636020867] [2022-11-18 21:12:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:12:45,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:12:45,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:12:45,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141746166] [2022-11-18 21:12:45,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:12:45,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:12:45,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:12:45,801 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:12:45,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 21:12:48,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-18 21:12:48,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:48,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-18 21:12:48,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 112 proven. 910 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-11-18 21:12:49,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:54,150 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 2) |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_~y~0#1| 6) 9) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 3 |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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:13:14,213 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_89| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380|) 9 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| 6)) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_89| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_89|)))))) is different from true [2022-11-18 21:13:32,260 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_89| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| 2)) 4) 0) (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380|) 9 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| 6)) (+ (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_89| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_380| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_89|))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 21:13:38,307 WARN L837 $PredicateComparison]: unable to prove that (or (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 3) |c_ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 4) |c_ULTIMATE.start_main_~k~0#1|) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) 16 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 4 |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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:17:53,628 WARN L837 $PredicateComparison]: unable to prove that (or (< (+ |c_ULTIMATE.start_main_~c~0#1| 11) |c_ULTIMATE.start_main_~k~0#1|) (not (< (+ |c_ULTIMATE.start_main_~c~0#1| 10) |c_ULTIMATE.start_main_~k~0#1|)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* 11 |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_~y~0#1| 22) 121)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:18:32,038 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (<= |ULTIMATE.start_main_~k~0#1| (+ |c_ULTIMATE.start_main_~c~0#1| 12)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 13) |ULTIMATE.start_main_~k~0#1|) (= (+ 169 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 26)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|) (* |ULTIMATE.start_main_~k~0#1| 13))))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:18:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:18:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636020867] [2022-11-18 21:18:34,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:18:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141746166] [2022-11-18 21:18:34,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141746166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:18:34,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:18:34,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-11-18 21:18:34,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238530687] [2022-11-18 21:18:34,063 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:18:34,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 21:18:34,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:18:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 21:18:34,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1641, Unknown=15, NotChecked=546, Total=2550 [2022-11-18 21:18:34,066 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-18 21:18:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:18:37,872 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2022-11-18 21:18:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 21:18:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 181 [2022-11-18 21:18:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:18:37,874 INFO L225 Difference]: With dead ends: 98 [2022-11-18 21:18:37,874 INFO L226 Difference]: Without dead ends: 93 [2022-11-18 21:18:37,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 250.1s TimeCoverageRelationStatistics Valid=367, Invalid=1897, Unknown=16, NotChecked=582, Total=2862 [2022-11-18 21:18:37,875 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:18:37,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 898 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 21:18:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-18 21:18:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-18 21:18:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 27 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-18 21:18:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2022-11-18 21:18:37,898 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 181 [2022-11-18 21:18:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:18:37,899 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2022-11-18 21:18:37,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-18 21:18:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2022-11-18 21:18:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-18 21:18:37,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:18:37,900 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1] [2022-11-18 21:18:37,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 21:18:38,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 21:18:38,101 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:18:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:18:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash -952162442, now seen corresponding path program 25 times [2022-11-18 21:18:38,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:18:38,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390903501] [2022-11-18 21:18:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:18:38,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:18:38,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:18:38,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103033790] [2022-11-18 21:18:38,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:18:38,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:18:38,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:18:38,121 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:18:38,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 21:18:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:18:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-18 21:18:38,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:18:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 126 proven. 976 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-11-18 21:18:39,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:18:43,614 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:19:03,665 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_101| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_101|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417|))))) is different from true [2022-11-18 21:19:21,714 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_101| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_101|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_417|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-18 21:19:27,747 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:19:29,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:19:29,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390903501] [2022-11-18 21:19:29,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:19:29,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103033790] [2022-11-18 21:19:29,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103033790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:19:29,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:19:29,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-11-18 21:19:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438215323] [2022-11-18 21:19:29,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:19:29,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 21:19:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:19:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 21:19:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1187, Unknown=4, NotChecked=284, Total=1560 [2022-11-18 21:19:29,773 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-18 21:19:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:19:31,563 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2022-11-18 21:19:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 21:19:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 188 [2022-11-18 21:19:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:19:31,565 INFO L225 Difference]: With dead ends: 101 [2022-11-18 21:19:31,565 INFO L226 Difference]: Without dead ends: 96 [2022-11-18 21:19:31,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=104, Invalid=1390, Unknown=4, NotChecked=308, Total=1806 [2022-11-18 21:19:31,566 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 7 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:19:31,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 930 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 21:19:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-18 21:19:31,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-18 21:19:31,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 28 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-18 21:19:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2022-11-18 21:19:31,593 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 188 [2022-11-18 21:19:31,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:19:31,594 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2022-11-18 21:19:31,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 27 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-18 21:19:31,594 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2022-11-18 21:19:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-18 21:19:31,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:19:31,595 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1] [2022-11-18 21:19:31,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 21:19:31,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 21:19:31,796 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:19:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:19:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1481354820, now seen corresponding path program 26 times [2022-11-18 21:19:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:19:31,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820886734] [2022-11-18 21:19:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:19:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:19:31,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:19:31,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971385221] [2022-11-18 21:19:31,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:19:31,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:19:31,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:19:31,809 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:19:31,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 21:19:32,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:19:32,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:19:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-18 21:19:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:19:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 128 proven. 1057 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2022-11-18 21:19:33,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:19:37,483 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| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |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| 3)) 4) 0))) is different from false [2022-11-18 21:19:37,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:19:37,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820886734] [2022-11-18 21:19:37,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:19:37,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971385221] [2022-11-18 21:19:37,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971385221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:19:37,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:19:37,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-11-18 21:19:37,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736236676] [2022-11-18 21:19:37,486 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:19:37,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 21:19:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:19:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 21:19:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1300, Unknown=1, NotChecked=72, Total=1482 [2022-11-18 21:19:37,487 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-18 21:19:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:19:39,478 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2022-11-18 21:19:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 21:19:39,479 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 195 [2022-11-18 21:19:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:19:39,480 INFO L225 Difference]: With dead ends: 104 [2022-11-18 21:19:39,480 INFO L226 Difference]: Without dead ends: 99 [2022-11-18 21:19:39,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=128, Invalid=1515, Unknown=1, NotChecked=78, Total=1722 [2022-11-18 21:19:39,481 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 6 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 2814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:19:39,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1022 Invalid, 2814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2813 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 21:19:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-18 21:19:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-18 21:19:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 29 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-18 21:19:39,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2022-11-18 21:19:39,505 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 195 [2022-11-18 21:19:39,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:19:39,506 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2022-11-18 21:19:39,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 33 states have internal predecessors, (65), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-18 21:19:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2022-11-18 21:19:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-18 21:19:39,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:19:39,507 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1] [2022-11-18 21:19:39,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 21:19:39,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 21:19:39,716 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:19:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:19:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1567740746, now seen corresponding path program 27 times [2022-11-18 21:19:39,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:19:39,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837055842] [2022-11-18 21:19:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:19:39,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:19:39,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:19:39,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308171488] [2022-11-18 21:19:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:19:39,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:19:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:19:39,728 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:19:39,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 21:19:41,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-11-18 21:19:41,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:19:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-18 21:19:41,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:19:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 109 proven. 1162 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-11-18 21:19:42,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:19:43,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:19:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837055842] [2022-11-18 21:19:43,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 21:19:43,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308171488] [2022-11-18 21:19:43,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308171488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:19:43,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:19:43,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-11-18 21:19:43,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114576622] [2022-11-18 21:19:43,240 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 21:19:43,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 21:19:43,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:19:43,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 21:19:43,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 21:19:43,241 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-18 21:19:45,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:19:45,285 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2022-11-18 21:19:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 21:19:45,286 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 202 [2022-11-18 21:19:45,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:19:45,287 INFO L225 Difference]: With dead ends: 107 [2022-11-18 21:19:45,287 INFO L226 Difference]: Without dead ends: 102 [2022-11-18 21:19:45,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=1593, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 21:19:45,288 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 7 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 2912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:19:45,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 1056 Invalid, 2912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 21:19:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-18 21:19:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-18 21:19:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 30 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-18 21:19:45,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2022-11-18 21:19:45,304 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 202 [2022-11-18 21:19:45,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:19:45,304 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2022-11-18 21:19:45,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-18 21:19:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2022-11-18 21:19:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-18 21:19:45,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:19:45,306 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1] [2022-11-18 21:19:45,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 21:19:45,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:19:45,506 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 21:19:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:19:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1548688260, now seen corresponding path program 28 times [2022-11-18 21:19:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:19:45,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98784372] [2022-11-18 21:19:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:19:45,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:19:45,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 21:19:45,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75944462] [2022-11-18 21:19:45,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:19:45,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:19:45,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:19:45,523 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:19:45,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_315e714b-64ca-44b0-80e6-40c73c9368e2/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process