./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/ps5-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/ps5-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8 --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 1d0411df2a3b388d2db53c57aaa1f7219c19c9d74992ef1ed00eab4b9b56cbed --- 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-2329fc7 [2022-12-13 21:04:19,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:04:19,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:04:19,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:04:19,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:04:19,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:04:19,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:04:19,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:04:19,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:04:19,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:04:19,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:04:19,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:04:19,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:04:19,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:04:19,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:04:19,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:04:19,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:04:19,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:04:19,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:04:19,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:04:19,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:04:19,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:04:19,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:04:19,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:04:19,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:04:19,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:04:19,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:04:19,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:04:19,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:04:19,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:04:19,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:04:19,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:04:19,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:04:19,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:04:19,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:04:19,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:04:19,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:04:19,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:04:19,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:04:19,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:04:19,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:04:19,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:04:19,092 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:04:19,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:04:19,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:04:19,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:04:19,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:04:19,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:04:19,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:04:19,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:04:19,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:04:19,095 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:04:19,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:04:19,095 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:04:19,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:04:19,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:04:19,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:04:19,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:04:19,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:04:19,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:04:19,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:04:19,096 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d0411df2a3b388d2db53c57aaa1f7219c19c9d74992ef1ed00eab4b9b56cbed [2022-12-13 21:04:19,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:04:19,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:04:19,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:04:19,302 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:04:19,302 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:04:19,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench/ps5-ll.c [2022-12-13 21:04:21,798 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:04:21,950 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:04:21,950 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/sv-benchmarks/c/nla-digbench/ps5-ll.c [2022-12-13 21:04:21,954 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/data/50efc0ffb/e6e3ed35c7f64f3ebd03ac39ef16b944/FLAG12b17f9f3 [2022-12-13 21:04:22,383 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/data/50efc0ffb/e6e3ed35c7f64f3ebd03ac39ef16b944 [2022-12-13 21:04:22,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:04:22,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:04:22,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:04:22,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:04:22,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:04:22,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7fff08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22, skipping insertion in model container [2022-12-13 21:04:22,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:04:22,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:04:22,507 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/sv-benchmarks/c/nla-digbench/ps5-ll.c[458,471] [2022-12-13 21:04:22,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:04:22,524 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:04:22,532 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/sv-benchmarks/c/nla-digbench/ps5-ll.c[458,471] [2022-12-13 21:04:22,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:04:22,546 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:04:22,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22 WrapperNode [2022-12-13 21:04:22,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:04:22,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:04:22,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:04:22,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:04:22,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,568 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-12-13 21:04:22,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:04:22,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:04:22,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:04:22,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:04:22,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,581 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,583 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:04:22,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:04:22,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:04:22,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:04:22,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (1/1) ... [2022-12-13 21:04:22,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:04:22,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:04:22,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:04:22,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:04:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:04:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:04:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:04:22,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:04:22,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 21:04:22,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 21:04:22,686 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:04:22,688 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:04:22,771 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:04:22,775 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:04:22,776 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 21:04:22,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:04:22 BoogieIcfgContainer [2022-12-13 21:04:22,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:04:22,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:04:22,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:04:22,781 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:04:22,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:04:22" (1/3) ... [2022-12-13 21:04:22,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2d9d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:04:22, skipping insertion in model container [2022-12-13 21:04:22,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:04:22" (2/3) ... [2022-12-13 21:04:22,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d2d9d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:04:22, skipping insertion in model container [2022-12-13 21:04:22,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:04:22" (3/3) ... [2022-12-13 21:04:22,783 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll.c [2022-12-13 21:04:22,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:04:22,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:04:22,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:04:22,837 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;@6b4f3673, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:04:22,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 21:04:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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) [2022-12-13 21:04:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 21:04:22,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:04:22,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:22,846 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:04:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2022-12-13 21:04:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:22,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493378523] [2022-12-13 21:04:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:22,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:22,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:04:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493378523] [2022-12-13 21:04:22,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 21:04:22,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999478527] [2022-12-13 21:04:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:22,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:04:22,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:04:22,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:04:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 21:04:22,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:23,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:04:23,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999478527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:04:23,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:04:23,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:04:23,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285856549] [2022-12-13 21:04:23,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:04:23,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 21:04:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:04:23,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 21:04:23,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:04:23,055 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-12-13 21:04:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:04:23,075 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-12-13 21:04:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 21:04:23,077 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2022-12-13 21:04:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:04:23,083 INFO L225 Difference]: With dead ends: 35 [2022-12-13 21:04:23,083 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 21:04:23,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 21:04:23,088 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2022-12-13 21:04:23,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:04:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 21:04:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-13 21:04:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-12-13 21:04:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-12-13 21:04:23,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-12-13 21:04:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:04:23,112 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-12-13 21:04:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-12-13 21:04:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-12-13 21:04:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 21:04:23,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:04:23,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:23,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:04:23,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 21:04:23,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:04:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2022-12-13 21:04:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:23,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380637629] [2022-12-13 21:04:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:23,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:23,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:04:23,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [496124973] [2022-12-13 21:04:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:23,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:23,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:04:23,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:04:23,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:04:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:23,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 21:04:23,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:23,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 21:04:23,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:04:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380637629] [2022-12-13 21:04:23,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:04:23,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496124973] [2022-12-13 21:04:23,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496124973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:04:23,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:04:23,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 21:04:23,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012759153] [2022-12-13 21:04:23,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:04:23,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 21:04:23,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:04:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 21:04:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 21:04:23,537 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-12-13 21:04:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:04:23,609 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-12-13 21:04:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:04:23,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 9 [2022-12-13 21:04:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:04:23,611 INFO L225 Difference]: With dead ends: 26 [2022-12-13 21:04:23,611 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 21:04:23,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:04:23,613 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:04:23,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:04:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 21:04:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-13 21:04:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 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) [2022-12-13 21:04:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-12-13 21:04:23,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2022-12-13 21:04:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:04:23,619 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-12-13 21:04:23,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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) [2022-12-13 21:04:23,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-12-13 21:04:23,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 21:04:23,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:04:23,620 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:23,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:04:23,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:23,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:04:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:23,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2022-12-13 21:04:23,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:23,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117775690] [2022-12-13 21:04:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:23,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:04:23,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876189974] [2022-12-13 21:04:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:23,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:23,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:04:23,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:04:23,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:04:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:24,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 21:04:24,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:24,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:04:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 21:04:24,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:04:24,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117775690] [2022-12-13 21:04:24,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:04:24,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876189974] [2022-12-13 21:04:24,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876189974] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 21:04:24,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:04:24,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-12-13 21:04:24,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284995262] [2022-12-13 21:04:24,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:04:24,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 21:04:24,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:04:24,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 21:04:24,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 21:04:24,205 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 21:04:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:04:24,262 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-12-13 21:04:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:04:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-12-13 21:04:24,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:04:24,264 INFO L225 Difference]: With dead ends: 28 [2022-12-13 21:04:24,264 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 21:04:24,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 21:04:24,265 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:04:24,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:04:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 21:04:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-13 21:04:24,275 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) [2022-12-13 21:04:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-12-13 21:04:24,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2022-12-13 21:04:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:04:24,276 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-12-13 21:04:24,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 21:04:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-12-13 21:04:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 21:04:24,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:04:24,277 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:24,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:04:24,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:24,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:04:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:24,481 INFO L85 PathProgramCache]: Analyzing trace with hash 233982219, now seen corresponding path program 1 times [2022-12-13 21:04:24,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:24,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525707816] [2022-12-13 21:04:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:24,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:24,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:04:24,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085983392] [2022-12-13 21:04:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:24,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:24,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:04:24,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:04:24,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:04:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 21:04:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 21:04:24,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:04:28,825 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-12-13 21:04:48,954 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_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))))) is different from true [2022-12-13 21:05:07,044 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_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-12-13 21:05:25,199 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-12-13 21:05:27,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:05:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525707816] [2022-12-13 21:05:27,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:05:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085983392] [2022-12-13 21:05:27,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085983392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:05:27,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:05:27,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-12-13 21:05:27,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893800163] [2022-12-13 21:05:27,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 21:05:27,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 21:05:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:05:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 21:05:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=105, Unknown=6, NotChecked=92, Total=240 [2022-12-13 21:05:27,237 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 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) [2022-12-13 21:05:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:05:27,405 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-12-13 21:05:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 21:05:27,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 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 [2022-12-13 21:05:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:05:27,406 INFO L225 Difference]: With dead ends: 33 [2022-12-13 21:05:27,406 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 21:05:27,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=56, Invalid=164, Unknown=6, NotChecked=116, Total=342 [2022-12-13 21:05:27,407 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:05:27,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 61 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:05:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 21:05:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-13 21:05:27,414 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) [2022-12-13 21:05:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-12-13 21:05:27,414 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2022-12-13 21:05:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:05:27,415 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-12-13 21:05:27,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 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) [2022-12-13 21:05:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-12-13 21:05:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 21:05:27,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:05:27,416 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:05:27,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:05:27,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:05:27,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:05:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:05:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash -595331518, now seen corresponding path program 2 times [2022-12-13 21:05:27,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:05:27,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615501537] [2022-12-13 21:05:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:05:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:05:27,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:05:27,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037279395] [2022-12-13 21:05:27,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:05:27,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:05:27,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:05:27,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:05:27,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:05:27,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:05:27,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:05:27,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 21:05:27,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:05:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 21:05:27,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:05:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 21:05:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:05:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615501537] [2022-12-13 21:05:28,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:05:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037279395] [2022-12-13 21:05:28,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037279395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:05:28,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 21:05:28,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-12-13 21:05:28,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161146736] [2022-12-13 21:05:28,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 21:05:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 21:05:28,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:05:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 21:05:28,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-12-13 21:05:28,080 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 21:05:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:05:28,670 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-12-13 21:05:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 21:05:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 34 [2022-12-13 21:05:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:05:28,671 INFO L225 Difference]: With dead ends: 44 [2022-12-13 21:05:28,671 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 21:05:28,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-12-13 21:05:28,672 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:05:28,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 154 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:05:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 21:05:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-13 21:05:28,681 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) [2022-12-13 21:05:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-12-13 21:05:28,681 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 34 [2022-12-13 21:05:28,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:05:28,682 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-12-13 21:05:28,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 21:05:28,682 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-12-13 21:05:28,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 21:05:28,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:05:28,683 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:05:28,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 21:05:28,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:05:28,883 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:05:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:05:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash 858822987, now seen corresponding path program 3 times [2022-12-13 21:05:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:05:28,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114860169] [2022-12-13 21:05:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:05:28,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:05:28,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:05:28,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61792574] [2022-12-13 21:05:28,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:05:28,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:05:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:05:28,892 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:05:28,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 21:06:08,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 21:06:08,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:06:08,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 21:06:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:06:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 19 proven. 58 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 21:06:08,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:06:08,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:06:08,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114860169] [2022-12-13 21:06:08,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:06:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61792574] [2022-12-13 21:06:08,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61792574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:06:08,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:06:08,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-12-13 21:06:08,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014187345] [2022-12-13 21:06:08,459 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 21:06:08,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 21:06:08,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:06:08,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 21:06:08,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-13 21:06:08,461 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 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) [2022-12-13 21:06:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:06:08,694 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-12-13 21:06:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 21:06:08,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 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 [2022-12-13 21:06:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:06:08,696 INFO L225 Difference]: With dead ends: 45 [2022-12-13 21:06:08,696 INFO L226 Difference]: Without dead ends: 39 [2022-12-13 21:06:08,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-12-13 21:06:08,698 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:06:08,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 137 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:06:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-13 21:06:08,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-13 21:06:08,707 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) [2022-12-13 21:06:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-12-13 21:06:08,708 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 55 [2022-12-13 21:06:08,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:06:08,708 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-12-13 21:06:08,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 7 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) [2022-12-13 21:06:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-12-13 21:06:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 21:06:08,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:06:08,709 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:06:08,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 21:06:08,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 21:06:08,910 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:06:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:06:08,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1272372738, now seen corresponding path program 4 times [2022-12-13 21:06:08,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:06:08,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948577040] [2022-12-13 21:06:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:06:08,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:06:08,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:06:08,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429831166] [2022-12-13 21:06:08,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:06:08,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:06:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:06:08,919 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:06:08,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 21:06:08,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:06:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:06:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 21:06:08,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:06:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-12-13 21:06:09,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:06:09,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:06:09,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948577040] [2022-12-13 21:06:09,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 21:06:09,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429831166] [2022-12-13 21:06:09,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429831166] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:06:09,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 21:06:09,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-12-13 21:06:09,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852597781] [2022-12-13 21:06:09,261 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 21:06:09,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 21:06:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:06:09,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 21:06:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-13 21:06:09,263 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 21:06:09,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:06:09,459 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-12-13 21:06:09,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:06:09,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 62 [2022-12-13 21:06:09,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:06:09,461 INFO L225 Difference]: With dead ends: 48 [2022-12-13 21:06:09,461 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 21:06:09,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 21:06:09,462 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 21:06:09,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 204 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 21:06:09,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 21:06:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-13 21:06:09,474 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) [2022-12-13 21:06:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-12-13 21:06:09,474 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 62 [2022-12-13 21:06:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:06:09,475 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-12-13 21:06:09,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 21:06:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-12-13 21:06:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 21:06:09,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:06:09,477 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:06:09,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 21:06:09,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:06:09,678 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:06:09,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:06:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1582509419, now seen corresponding path program 5 times [2022-12-13 21:06:09,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:06:09,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452544497] [2022-12-13 21:06:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:06:09,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:06:09,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 21:06:09,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658375169] [2022-12-13 21:06:09,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:06:09,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:06:09,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:06:09,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:06:09,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7bdbaa0-d273-45ac-90c1-2714b7562520/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process