./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/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_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/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_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/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 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d --- 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 12:04:28,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:04:28,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:04:28,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:04:28,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:04:28,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:04:28,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:04:28,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:04:28,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:04:28,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:04:28,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:04:28,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:04:28,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:04:28,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:04:28,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:04:28,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:04:28,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:04:28,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:04:28,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:04:28,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:04:28,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:04:28,986 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:04:28,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:04:28,988 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:04:28,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:04:28,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:04:28,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:04:28,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:04:28,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:04:28,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:04:28,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:04:28,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:04:28,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:04:28,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:04:28,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:04:28,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:04:28,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:04:28,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:04:28,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:04:29,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:04:29,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:04:29,002 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 12:04:29,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:04:29,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:04:29,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:04:29,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:04:29,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:04:29,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:04:29,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:04:29,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:04:29,026 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:04:29,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:04:29,026 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:04:29,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:04:29,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:04:29,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:04:29,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:04:29,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:04:29,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:04:29,027 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:04:29,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:04:29,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:04:29,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:04:29,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:04:29,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:04:29,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:04:29,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:04:29,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:04:29,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:04:29,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:04:29,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:04:29,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:04:29,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:04:29,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:04:29,030 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:04:29,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:04:29,030 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:04:29,031 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_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d [2022-12-13 12:04:29,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:04:29,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:04:29,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:04:29,243 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:04:29,243 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:04:29,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2022-12-13 12:04:31,710 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:04:31,858 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:04:31,859 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2022-12-13 12:04:31,863 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/data/a3da9e1cf/f9014d72a5ba41e1bf75f5cb3ce8cbe8/FLAG0b3245910 [2022-12-13 12:04:32,278 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/data/a3da9e1cf/f9014d72a5ba41e1bf75f5cb3ce8cbe8 [2022-12-13 12:04:32,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:04:32,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:04:32,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:04:32,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:04:32,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:04:32,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bcdb52c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32, skipping insertion in model container [2022-12-13 12:04:32,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:04:32,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:04:32,402 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_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2022-12-13 12:04:32,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:04:32,429 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:04:32,438 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_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2022-12-13 12:04:32,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:04:32,458 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:04:32,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32 WrapperNode [2022-12-13 12:04:32,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:04:32,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:04:32,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:04:32,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:04:32,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,494 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-12-13 12:04:32,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:04:32,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:04:32,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:04:32,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:04:32,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,514 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:04:32,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:04:32,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:04:32,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:04:32,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (1/1) ... [2022-12-13 12:04:32,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:04:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:32,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:04:32,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:04:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:04:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:04:32,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:04:32,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:04:32,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 12:04:32,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 12:04:32,641 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:04:32,643 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:04:32,839 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:04:32,845 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:04:32,845 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 12:04:32,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:04:32 BoogieIcfgContainer [2022-12-13 12:04:32,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:04:32,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:04:32,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:04:32,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:04:32,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:04:32" (1/3) ... [2022-12-13 12:04:32,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8485d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:04:32, skipping insertion in model container [2022-12-13 12:04:32,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:04:32" (2/3) ... [2022-12-13 12:04:32,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a8485d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:04:32, skipping insertion in model container [2022-12-13 12:04:32,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:04:32" (3/3) ... [2022-12-13 12:04:32,857 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2022-12-13 12:04:32,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:04:32,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 12:04:32,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:04:32,953 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;@415fd1db, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:04:32,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 12:04:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 12:04:32,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 12:04:32,964 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:04:32,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:32,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:04:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash -797370321, now seen corresponding path program 1 times [2022-12-13 12:04:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:32,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104511921] [2022-12-13 12:04:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:32,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:33,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104511921] [2022-12-13 12:04:33,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 12:04:33,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256037971] [2022-12-13 12:04:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:33,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:33,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:33,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:33,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:04:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:33,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 12:04:33,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:33,178 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 12:04:33,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:04:33,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256037971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:04:33,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:04:33,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:04:33,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909948982] [2022-12-13 12:04:33,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:04:33,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 12:04:33,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 12:04:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 12:04:33,215 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 12:04:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:04:33,236 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2022-12-13 12:04:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 12:04:33,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2022-12-13 12:04:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:04:33,244 INFO L225 Difference]: With dead ends: 57 [2022-12-13 12:04:33,245 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 12:04:33,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 12:04:33,250 INFO L413 NwaCegarLoop]: 42 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, 42 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 12:04:33,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:04:33,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 12:04:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-13 12:04:33,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 9 states have call successors, (9), 1 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 12:04:33,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 38 transitions. [2022-12-13 12:04:33,282 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 38 transitions. Word has length 10 [2022-12-13 12:04:33,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:04:33,282 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 38 transitions. [2022-12-13 12:04:33,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 12:04:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 38 transitions. [2022-12-13 12:04:33,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 12:04:33,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:04:33,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:33,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:04:33,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 12:04:33,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:04:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1698606518, now seen corresponding path program 1 times [2022-12-13 12:04:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:33,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934075585] [2022-12-13 12:04:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:33,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:33,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934075585] [2022-12-13 12:04:33,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 12:04:33,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933983620] [2022-12-13 12:04:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:33,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:33,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:33,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:33,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:04:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:04:33,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:33,653 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 12:04:33,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:04:33,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933983620] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:04:33,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:04:33,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:04:33,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879391455] [2022-12-13 12:04:33,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:04:33,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:04:33,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:04:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:04:33,656 INFO L87 Difference]: Start difference. First operand 26 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12:04:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:04:33,675 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-12-13 12:04:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:04:33,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2022-12-13 12:04:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:04:33,676 INFO L225 Difference]: With dead ends: 47 [2022-12-13 12:04:33,676 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 12:04:33,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:04:33,678 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:04:33,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:04:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 12:04:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-13 12:04:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 1 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 12:04:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2022-12-13 12:04:33,683 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 12 [2022-12-13 12:04:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:04:33,683 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2022-12-13 12:04:33,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12:04:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2022-12-13 12:04:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 12:04:33,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:04:33,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:33,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:04:33,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:33,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:04:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:33,888 INFO L85 PathProgramCache]: Analyzing trace with hash 776097594, now seen corresponding path program 1 times [2022-12-13 12:04:33,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:33,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105097853] [2022-12-13 12:04:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:33,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:33,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:04:33,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351467466] [2022-12-13 12:04:33,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:33,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:33,942 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:33,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:04:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:04:34,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:34,092 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 12:04:34,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:04:34,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:34,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105097853] [2022-12-13 12:04:34,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:04:34,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351467466] [2022-12-13 12:04:34,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351467466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:04:34,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:04:34,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:04:34,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616469573] [2022-12-13 12:04:34,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:04:34,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:04:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:04:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:04:34,095 INFO L87 Difference]: Start difference. First operand 28 states and 40 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, (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 12:04:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:04:34,116 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-12-13 12:04:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:04:34,117 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, (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 13 [2022-12-13 12:04:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:04:34,118 INFO L225 Difference]: With dead ends: 41 [2022-12-13 12:04:34,118 INFO L226 Difference]: Without dead ends: 32 [2022-12-13 12:04:34,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:04:34,119 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:04:34,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 130 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:04:34,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-13 12:04:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-12-13 12:04:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 9 states have call successors, (9), 1 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 12:04:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 44 transitions. [2022-12-13 12:04:34,126 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 44 transitions. Word has length 13 [2022-12-13 12:04:34,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:04:34,127 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 44 transitions. [2022-12-13 12:04:34,127 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, (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 12:04:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 44 transitions. [2022-12-13 12:04:34,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 12:04:34,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:04:34,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:34,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:04:34,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:34,329 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:04:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash 777587144, now seen corresponding path program 1 times [2022-12-13 12:04:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519407338] [2022-12-13 12:04:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:34,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:34,677 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 12:04:34,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:34,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519407338] [2022-12-13 12:04:34,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519407338] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:04:34,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:04:34,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 12:04:34,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066098707] [2022-12-13 12:04:34,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:04:34,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:04:34,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:34,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:04:34,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:04:34,679 INFO L87 Difference]: Start difference. First operand 31 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12:04:37,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:04:39,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:04:41,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:04:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:04:45,068 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2022-12-13 12:04:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:04:45,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 13 [2022-12-13 12:04:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:04:45,069 INFO L225 Difference]: With dead ends: 64 [2022-12-13 12:04:45,069 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 12:04:45,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:04:45,070 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:04:45,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 154 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 3 Unknown, 0 Unchecked, 10.3s Time] [2022-12-13 12:04:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 12:04:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-12-13 12:04:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 12:04:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2022-12-13 12:04:45,085 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 13 [2022-12-13 12:04:45,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:04:45,085 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2022-12-13 12:04:45,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12:04:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2022-12-13 12:04:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 12:04:45,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:04:45,086 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:45,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 12:04:45,086 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:04:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash 84493759, now seen corresponding path program 1 times [2022-12-13 12:04:45,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:45,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982766033] [2022-12-13 12:04:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:45,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:04:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686242822] [2022-12-13 12:04:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:45,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:45,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:45,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:45,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:04:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:45,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:04:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:45,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:45,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982766033] [2022-12-13 12:04:45,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:04:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686242822] [2022-12-13 12:04:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686242822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:45,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:04:45,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 12:04:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245896761] [2022-12-13 12:04:45,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:45,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:04:45,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:45,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:04:45,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:04:45,182 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 12:04:46,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:04:48,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:04:50,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:04:53,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:04:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:04:54,735 INFO L93 Difference]: Finished difference Result 98 states and 142 transitions. [2022-12-13 12:04:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:04:54,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 15 [2022-12-13 12:04:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:04:54,736 INFO L225 Difference]: With dead ends: 98 [2022-12-13 12:04:54,736 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 12:04:54,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:04:54,738 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 58 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:04:54,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 236 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2022-12-13 12:04:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 12:04:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2022-12-13 12:04:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 12:04:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2022-12-13 12:04:54,749 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 15 [2022-12-13 12:04:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:04:54,749 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2022-12-13 12:04:54,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 12:04:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2022-12-13 12:04:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 12:04:54,750 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:04:54,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:04:54,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:04:54,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:54,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:04:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:54,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2016757679, now seen corresponding path program 1 times [2022-12-13 12:04:54,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:54,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302639370] [2022-12-13 12:04:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:54,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:54,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:04:54,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466681462] [2022-12-13 12:04:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:54,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:54,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:54,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:54,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:04:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 12:04:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:55,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:04:55,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:55,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302639370] [2022-12-13 12:04:55,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:04:55,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466681462] [2022-12-13 12:04:55,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466681462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:55,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:04:55,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 12:04:55,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593318916] [2022-12-13 12:04:55,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:55,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:04:55,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:04:55,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:04:55,093 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 12:04:57,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:04:58,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:05:01,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:05:05,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:05:07,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:05:09,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:05:12,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:05:14,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:05:17,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:05:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:05:17,234 INFO L93 Difference]: Finished difference Result 124 states and 174 transitions. [2022-12-13 12:05:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 12:05:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 16 [2022-12-13 12:05:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:05:17,237 INFO L225 Difference]: With dead ends: 124 [2022-12-13 12:05:17,237 INFO L226 Difference]: Without dead ends: 115 [2022-12-13 12:05:17,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:05:17,238 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 109 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 34 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:05:17,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 300 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 101 Invalid, 8 Unknown, 0 Unchecked, 22.1s Time] [2022-12-13 12:05:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-13 12:05:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2022-12-13 12:05:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 65 states have internal predecessors, (80), 39 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-13 12:05:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 155 transitions. [2022-12-13 12:05:17,258 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 155 transitions. Word has length 16 [2022-12-13 12:05:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:05:17,259 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 155 transitions. [2022-12-13 12:05:17,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 12:05:17,259 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 155 transitions. [2022-12-13 12:05:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 12:05:17,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:05:17,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:05:17,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:05:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:17,462 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:05:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2015268129, now seen corresponding path program 1 times [2022-12-13 12:05:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:05:17,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494718000] [2022-12-13 12:05:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:17,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:05:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:05:17,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:05:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494718000] [2022-12-13 12:05:17,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494718000] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:05:17,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:05:17,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 12:05:17,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712937559] [2022-12-13 12:05:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:05:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:05:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:05:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:05:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:05:17,668 INFO L87 Difference]: Start difference. First operand 106 states and 155 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 12:05:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:05:19,814 INFO L93 Difference]: Finished difference Result 186 states and 282 transitions. [2022-12-13 12:05:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:05:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 16 [2022-12-13 12:05:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:05:19,816 INFO L225 Difference]: With dead ends: 186 [2022-12-13 12:05:19,816 INFO L226 Difference]: Without dead ends: 184 [2022-12-13 12:05:19,817 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 12:05:19,817 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 18 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:05:19,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 158 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-13 12:05:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-13 12:05:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 133. [2022-12-13 12:05:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 80 states have (on average 1.2625) internal successors, (101), 88 states have internal predecessors, (101), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2022-12-13 12:05:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 182 transitions. [2022-12-13 12:05:19,849 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 182 transitions. Word has length 16 [2022-12-13 12:05:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:05:19,849 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 182 transitions. [2022-12-13 12:05:19,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 12:05:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 182 transitions. [2022-12-13 12:05:19,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 12:05:19,850 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:05:19,850 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:05:19,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 12:05:19,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:05:19,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:19,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1484248551, now seen corresponding path program 1 times [2022-12-13 12:05:19,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:05:19,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729763403] [2022-12-13 12:05:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:19,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:05:19,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:05:19,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553883715] [2022-12-13 12:05:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:19,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:05:19,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:05:19,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:05:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:19,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:05:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:20,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:05:51,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:05:51,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729763403] [2022-12-13 12:05:51,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:05:51,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553883715] [2022-12-13 12:05:51,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553883715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:51,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:05:51,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-13 12:05:51,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899888988] [2022-12-13 12:05:51,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:51,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:05:51,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:05:51,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:05:51,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2022-12-13 12:05:51,679 INFO L87 Difference]: Start difference. First operand 133 states and 182 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 12:05:54,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:00,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:03,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:05,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:07,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:09,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:11,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:14,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:17,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:20,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:22,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:24,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:27,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:29,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:31,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:34,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:36,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:38,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:40,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:43,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:44,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:46,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:49,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:51,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:54,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:57,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:06:59,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:01,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:03,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:05,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:07,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:09,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:12,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:14,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:17,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:18,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:19,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:07:20,590 INFO L93 Difference]: Finished difference Result 154 states and 204 transitions. [2022-12-13 12:07:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:07:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-12-13 12:07:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:07:20,592 INFO L225 Difference]: With dead ends: 154 [2022-12-13 12:07:20,592 INFO L226 Difference]: Without dead ends: 150 [2022-12-13 12:07:20,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=53, Invalid=155, Unknown=2, NotChecked=0, Total=210 [2022-12-13 12:07:20,593 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 35 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:07:20,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 120 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 260 Invalid, 32 Unknown, 0 Unchecked, 87.5s Time] [2022-12-13 12:07:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-13 12:07:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-12-13 12:07:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 100 states have internal predecessors, (113), 40 states have call successors, (40), 14 states have call predecessors, (40), 14 states have return successors, (37), 32 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-13 12:07:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2022-12-13 12:07:20,613 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 18 [2022-12-13 12:07:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:07:20,613 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2022-12-13 12:07:20,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 12:07:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2022-12-13 12:07:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 12:07:20,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:07:20,614 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:07:20,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:07:20,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:07:20,815 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:07:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:07:20,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1188910040, now seen corresponding path program 1 times [2022-12-13 12:07:20,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:07:20,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332001085] [2022-12-13 12:07:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:07:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:07:20,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:07:20,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579792932] [2022-12-13 12:07:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:07:20,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:07:20,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:07:20,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:07:20,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:07:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:07:20,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:07:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 12:07:21,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:07:23,284 WARN L859 $PredicateComparison]: unable to prove that (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) is different from true [2022-12-13 12:07:29,424 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~q~0#1| Int) (|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) 4294967296) (mod (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) 4294967296))) (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 4294967280) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 12) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 16 |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1| 4294967284) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))) is different from false [2022-12-13 12:07:30,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:07:30,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332001085] [2022-12-13 12:07:30,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:07:30,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579792932] [2022-12-13 12:07:30,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579792932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:07:30,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:07:30,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-12-13 12:07:30,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471485281] [2022-12-13 12:07:30,568 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 12:07:30,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:07:30,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:07:30,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:07:30,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=56, Unknown=2, NotChecked=30, Total=110 [2022-12-13 12:07:30,569 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:07:33,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:34,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:36,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:38,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:43,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:45,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:47,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:49,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:51,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:53,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:07:55,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:07:59,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:08:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:08:00,745 INFO L93 Difference]: Finished difference Result 153 states and 194 transitions. [2022-12-13 12:08:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:08:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-12-13 12:08:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:08:00,747 INFO L225 Difference]: With dead ends: 153 [2022-12-13 12:08:00,747 INFO L226 Difference]: Without dead ends: 125 [2022-12-13 12:08:00,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=35, Invalid=81, Unknown=2, NotChecked=38, Total=156 [2022-12-13 12:08:00,748 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:08:00,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 116 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 11 Unknown, 0 Unchecked, 30.1s Time] [2022-12-13 12:08:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-13 12:08:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-12-13 12:08:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.2375) internal successors, (99), 87 states have internal predecessors, (99), 33 states have call successors, (33), 11 states have call predecessors, (33), 11 states have return successors, (31), 26 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-13 12:08:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 163 transitions. [2022-12-13 12:08:00,772 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 163 transitions. Word has length 23 [2022-12-13 12:08:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:08:00,773 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 163 transitions. [2022-12-13 12:08:00,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:08:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 163 transitions. [2022-12-13 12:08:00,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 12:08:00,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:08:00,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:08:00,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:08:00,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 12:08:00,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:08:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:08:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash 206453113, now seen corresponding path program 1 times [2022-12-13 12:08:00,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:08:00,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376542804] [2022-12-13 12:08:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:08:00,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:08:01,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:08:01,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556823390] [2022-12-13 12:08:01,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:08:01,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:08:01,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:08:01,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:08:01,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:08:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:08:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:08:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:08:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:08:01,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:09:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:09:13,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:09:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376542804] [2022-12-13 12:09:13,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:09:13,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556823390] [2022-12-13 12:09:13,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556823390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:09:13,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:09:13,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-12-13 12:09:13,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831774321] [2022-12-13 12:09:13,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:09:13,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 12:09:13,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:09:13,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 12:09:13,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=209, Unknown=3, NotChecked=0, Total=272 [2022-12-13 12:09:13,484 INFO L87 Difference]: Start difference. First operand 125 states and 163 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 12:09:18,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:09:52,506 WARN L233 SmtUtils]: Spent 29.42s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:09:54,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:09:56,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:09:58,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:02,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:04,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:06,887 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (.cse3 (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296)) (.cse2 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (and (or (<= (* (mod (+ |c_ULTIMATE.start_main_~p~0#1| (* 2 |c_ULTIMATE.start_main_~q~0#1|)) 2147483648) 2) .cse0) (= (* (mod .cse1 1073741824) 4) (mod (+ .cse2 (* |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) (<= (* (mod |c_ULTIMATE.start_main_~q~0#1| 1073741824) 4) .cse3)) (or (<= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296) .cse0) (<= (mod |c_ULTIMATE.start_main_~q~0#1| 4294967296) .cse3) (= (mod (+ .cse2 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod .cse1 4294967296))))) is different from true [2022-12-13 12:10:13,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:14,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:16,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:20,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:23,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:30,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:32,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:33,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:35,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:37,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:40,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:42,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:44,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:46,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:48,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:50,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:52,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:10:56,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:01,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:03,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:05,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:08,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:10,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:12,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:14,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:16,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:19,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:22,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:24,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:29,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:31,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:35,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:36,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:41,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:43,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:46,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:47,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:48,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:50,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:52,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:56,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:11:59,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:02,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:03,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:05,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:08,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:10,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:12,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:14,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:16,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:18,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:26,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:28,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:30,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:33,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:35,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:37,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:42,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:45,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:47,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:52,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:55,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:12:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:12:55,454 INFO L93 Difference]: Finished difference Result 250 states and 349 transitions. [2022-12-13 12:12:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 12:12:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-12-13 12:12:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:12:55,457 INFO L225 Difference]: With dead ends: 250 [2022-12-13 12:12:55,457 INFO L226 Difference]: Without dead ends: 201 [2022-12-13 12:12:55,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 78.4s TimeCoverageRelationStatistics Valid=88, Invalid=291, Unknown=5, NotChecked=36, Total=420 [2022-12-13 12:12:55,458 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 53 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 79 mSolverCounterUnsat, 49 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 182.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 49 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 183.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:12:55,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 220 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 522 Invalid, 49 Unknown, 12 Unchecked, 183.0s Time] [2022-12-13 12:12:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-13 12:12:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 191. [2022-12-13 12:12:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 115 states have (on average 1.208695652173913) internal successors, (139), 123 states have internal predecessors, (139), 58 states have call successors, (58), 17 states have call predecessors, (58), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-12-13 12:12:55,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 252 transitions. [2022-12-13 12:12:55,487 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 252 transitions. Word has length 24 [2022-12-13 12:12:55,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:12:55,487 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 252 transitions. [2022-12-13 12:12:55,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 12:12:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 252 transitions. [2022-12-13 12:12:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 12:12:55,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:12:55,488 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:12:55,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 12:12:55,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 12:12:55,690 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:12:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:12:55,691 INFO L85 PathProgramCache]: Analyzing trace with hash -158866305, now seen corresponding path program 1 times [2022-12-13 12:12:55,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:12:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605861] [2022-12-13 12:12:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:12:55,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:12:55,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:12:55,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398389184] [2022-12-13 12:12:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:12:55,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:12:55,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:12:55,718 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:12:55,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:12:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:12:55,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:12:55,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:12:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 12:12:55,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:13:05,115 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~q~0#1| Int) (|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) 4294967296) (mod (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) 4294967296))) (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 4294967280) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 12) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 16 |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1| 4294967284) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))) is different from false [2022-12-13 12:13:06,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:06,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605861] [2022-12-13 12:13:06,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:13:06,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398389184] [2022-12-13 12:13:06,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398389184] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:13:06,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:13:06,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-12-13 12:13:06,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206097694] [2022-12-13 12:13:06,132 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 12:13:06,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:13:06,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:06,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:13:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2022-12-13 12:13:06,132 INFO L87 Difference]: Start difference. First operand 191 states and 252 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:13:08,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:10,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:12,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:14,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:16,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:19,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:20,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:13:20,873 INFO L93 Difference]: Finished difference Result 239 states and 309 transitions. [2022-12-13 12:13:20,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:13:20,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-12-13 12:13:20,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:13:20,875 INFO L225 Difference]: With dead ends: 239 [2022-12-13 12:13:20,875 INFO L226 Difference]: Without dead ends: 235 [2022-12-13 12:13:20,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=37, Invalid=98, Unknown=1, NotChecked=20, Total=156 [2022-12-13 12:13:20,875 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 15 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:13:20,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 88 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 155 Invalid, 6 Unknown, 0 Unchecked, 14.2s Time] [2022-12-13 12:13:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-12-13 12:13:20,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2022-12-13 12:13:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 139 states have (on average 1.1798561151079137) internal successors, (164), 148 states have internal predecessors, (164), 69 states have call successors, (69), 24 states have call predecessors, (69), 24 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-13 12:13:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 298 transitions. [2022-12-13 12:13:20,902 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 298 transitions. Word has length 26 [2022-12-13 12:13:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:13:20,902 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 298 transitions. [2022-12-13 12:13:20,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:13:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 298 transitions. [2022-12-13 12:13:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 12:13:20,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:13:20,902 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:20,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:13:21,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 12:13:21,104 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:13:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:21,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2097639676, now seen corresponding path program 1 times [2022-12-13 12:13:21,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:21,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400741707] [2022-12-13 12:13:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:21,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:21,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400741707] [2022-12-13 12:13:21,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400741707] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:13:21,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136528183] [2022-12-13 12:13:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:21,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:13:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:13:21,247 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:13:21,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:13:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:13:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:13:21,305 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:21,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:13:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:21,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136528183] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:13:21,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:13:21,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-12-13 12:13:21,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932773501] [2022-12-13 12:13:21,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:13:21,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 12:13:21,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 12:13:21,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:13:21,362 INFO L87 Difference]: Start difference. First operand 233 states and 298 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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 12:13:24,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:25,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:30,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:32,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:34,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:38,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:41,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:43,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:49,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:13:51,335 INFO L93 Difference]: Finished difference Result 514 states and 659 transitions. [2022-12-13 12:13:51,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 12:13:51,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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 24 [2022-12-13 12:13:51,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:13:51,337 INFO L225 Difference]: With dead ends: 514 [2022-12-13 12:13:51,337 INFO L226 Difference]: Without dead ends: 470 [2022-12-13 12:13:51,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:13:51,338 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 306 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 185 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:13:51,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 357 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 256 Invalid, 7 Unknown, 0 Unchecked, 29.9s Time] [2022-12-13 12:13:51,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-13 12:13:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 455. [2022-12-13 12:13:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 258 states have (on average 1.2015503875968991) internal successors, (310), 274 states have internal predecessors, (310), 144 states have call successors, (144), 52 states have call predecessors, (144), 52 states have return successors, (129), 128 states have call predecessors, (129), 129 states have call successors, (129) [2022-12-13 12:13:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 583 transitions. [2022-12-13 12:13:51,382 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 583 transitions. Word has length 24 [2022-12-13 12:13:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:13:51,382 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 583 transitions. [2022-12-13 12:13:51,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 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 12:13:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 583 transitions. [2022-12-13 12:13:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 12:13:51,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:13:51,383 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:51,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:13:51,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 12:13:51,583 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:13:51,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:51,584 INFO L85 PathProgramCache]: Analyzing trace with hash 168175856, now seen corresponding path program 1 times [2022-12-13 12:13:51,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:51,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184963379] [2022-12-13 12:13:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:51,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:13:51,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794289657] [2022-12-13 12:13:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:51,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:13:51,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:13:51,590 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:13:51,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:13:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:51,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:13:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:13:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:13:51,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:13:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:51,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:51,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184963379] [2022-12-13 12:13:51,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:13:51,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794289657] [2022-12-13 12:13:51,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794289657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:13:51,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:13:51,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-12-13 12:13:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819496772] [2022-12-13 12:13:51,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:13:51,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 12:13:51,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:51,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 12:13:51,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:13:51,775 INFO L87 Difference]: Start difference. First operand 455 states and 583 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:13:52,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:13:55,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:13:57,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:14:00,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:14:01,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:14:05,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:14:09,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:14:12,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:14:14,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:14:16,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:14:19,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:14:23,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:14:26,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:14:29,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:14:33,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:14:37,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:14:39,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:14:39,122 INFO L93 Difference]: Finished difference Result 992 states and 1273 transitions. [2022-12-13 12:14:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 12:14:39,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-12-13 12:14:39,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:14:39,125 INFO L225 Difference]: With dead ends: 992 [2022-12-13 12:14:39,125 INFO L226 Difference]: Without dead ends: 928 [2022-12-13 12:14:39,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=528, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:14:39,126 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 356 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 192 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:14:39,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 417 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 332 Invalid, 14 Unknown, 0 Unchecked, 47.2s Time] [2022-12-13 12:14:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-12-13 12:14:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 909. [2022-12-13 12:14:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 514 states have (on average 1.2042801556420233) internal successors, (619), 548 states have internal predecessors, (619), 285 states have call successors, (285), 110 states have call predecessors, (285), 109 states have return successors, (257), 250 states have call predecessors, (257), 257 states have call successors, (257) [2022-12-13 12:14:39,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1161 transitions. [2022-12-13 12:14:39,195 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1161 transitions. Word has length 33 [2022-12-13 12:14:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:14:39,195 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 1161 transitions. [2022-12-13 12:14:39,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:14:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1161 transitions. [2022-12-13 12:14:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 12:14:39,196 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:14:39,196 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:14:39,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:14:39,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 12:14:39,398 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:14:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:14:39,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1006074398, now seen corresponding path program 1 times [2022-12-13 12:14:39,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:14:39,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848348116] [2022-12-13 12:14:39,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:14:39,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:14:39,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:14:39,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975423230] [2022-12-13 12:14:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:14:39,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:14:39,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:14:39,422 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:14:39,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:14:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:14:39,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 12:14:39,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:14:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 12:14:40,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:14:56,814 WARN L859 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~q~0#1| Int) (|ULTIMATE.start_main_~p~0#1| Int)) (or (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1| 4) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| 4) (* |c_ULTIMATE.start_main_~n~0#1| 4294967288 |ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) (not (= (mod (+ (* 4294967292 |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~r~0#1| 12) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| 4294967284) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280) (* |c_ULTIMATE.start_main_~n~0#1| 16 |ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296) 0)))) is different from true [2022-12-13 12:14:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:14:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848348116] [2022-12-13 12:14:56,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:14:56,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975423230] [2022-12-13 12:14:56,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975423230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:14:56,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-13 12:14:56,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-12-13 12:14:56,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568190479] [2022-12-13 12:14:56,815 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-13 12:14:56,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:14:56,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:14:56,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:14:56,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=67, Unknown=3, NotChecked=16, Total=110 [2022-12-13 12:14:56,815 INFO L87 Difference]: Start difference. First operand 909 states and 1161 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:14:58,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:15:00,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:15:02,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:15:05,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:15:07,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:15:09,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 12:15:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:15:10,294 INFO L93 Difference]: Finished difference Result 945 states and 1197 transitions. [2022-12-13 12:15:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:15:10,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-12-13 12:15:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:15:10,297 INFO L225 Difference]: With dead ends: 945 [2022-12-13 12:15:10,297 INFO L226 Difference]: Without dead ends: 941 [2022-12-13 12:15:10,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=37, Invalid=96, Unknown=3, NotChecked=20, Total=156 [2022-12-13 12:15:10,298 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:15:10,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 84 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 6 Unknown, 0 Unchecked, 12.9s Time] [2022-12-13 12:15:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-12-13 12:15:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 936. [2022-12-13 12:15:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 535 states have (on average 1.1925233644859814) internal successors, (638), 569 states have internal predecessors, (638), 284 states have call successors, (284), 117 states have call predecessors, (284), 116 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2022-12-13 12:15:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1179 transitions. [2022-12-13 12:15:10,394 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1179 transitions. Word has length 37 [2022-12-13 12:15:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:15:10,394 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1179 transitions. [2022-12-13 12:15:10,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:15:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1179 transitions. [2022-12-13 12:15:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 12:15:10,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:15:10,395 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:15:10,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:15:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:15:10,596 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:15:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:15:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash 581779513, now seen corresponding path program 2 times [2022-12-13 12:15:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:15:10,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044861044] [2022-12-13 12:15:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:15:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:15:10,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:15:10,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754955518] [2022-12-13 12:15:10,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:15:10,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:15:10,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:15:10,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:15:10,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_173bf52b-4a01-4fb7-9422-68cf6ea76c9a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:15:10,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:15:10,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:15:10,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 12:15:10,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:15:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:15:10,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:22,676 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:18:07,153 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:19:01,603 WARN L233 SmtUtils]: Spent 5.55s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:19:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 34 refuted. 30 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:19:11,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:19:11,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044861044] [2022-12-13 12:19:11,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:19:11,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754955518] [2022-12-13 12:19:11,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754955518] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:19:11,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:19:11,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-12-13 12:19:11,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416910488] [2022-12-13 12:19:11,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:19:11,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 12:19:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:19:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 12:19:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=446, Unknown=26, NotChecked=0, Total=600 [2022-12-13 12:19:11,005 INFO L87 Difference]: Start difference. First operand 936 states and 1179 transitions. Second operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 12:19:14,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:19:17,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:19:19,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:19:22,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:19:30,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:19:32,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:19:34,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:19:37,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-13 12:19:50,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []