./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R --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 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 --- 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-38b53e6 [2022-11-25 15:44:48,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:44:48,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:44:48,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:44:48,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:44:48,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:44:48,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:44:48,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:44:48,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:44:48,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:44:48,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:44:48,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:44:48,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:44:48,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:44:48,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:44:48,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:44:48,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:44:48,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:44:48,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:44:48,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:44:48,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:44:48,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:44:48,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:44:48,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:44:48,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:44:48,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:44:48,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:44:48,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:44:48,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:44:48,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:44:48,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:44:48,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:44:48,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:44:48,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:44:48,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:44:48,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:44:48,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:44:48,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:44:48,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:44:48,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:44:48,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:44:48,390 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:44:48,431 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:44:48,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:44:48,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:44:48,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:44:48,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:44:48,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:44:48,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:44:48,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:44:48,435 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:44:48,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:44:48,436 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:44:48,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:44:48,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:44:48,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:44:48,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:44:48,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:44:48,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:44:48,438 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:44:48,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:44:48,438 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:44:48,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:44:48,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:44:48,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:44:48,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:44:48,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:44:48,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:44:48,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:44:48,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:44:48,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:44:48,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:44:48,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:44:48,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:44:48,442 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:44:48,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:44:48,442 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_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 [2022-11-25 15:44:48,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:44:48,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:44:48,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:44:48,781 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:44:48,782 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:44:48,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-fpi/nsqm-if.c [2022-11-25 15:44:51,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:44:52,054 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:44:52,055 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/sv-benchmarks/c/array-fpi/nsqm-if.c [2022-11-25 15:44:52,062 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/data/67eea817a/c05c423113ee48e08d4a07cb725a331d/FLAG2ae85e2dc [2022-11-25 15:44:52,078 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/data/67eea817a/c05c423113ee48e08d4a07cb725a331d [2022-11-25 15:44:52,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:44:52,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:44:52,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:44:52,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:44:52,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:44:52,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc57272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52, skipping insertion in model container [2022-11-25 15:44:52,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:44:52,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:44:52,291 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_5cface71-8831-41a5-b69f-335d1c82e3c2/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-11-25 15:44:52,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:44:52,323 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:44:52,336 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_5cface71-8831-41a5-b69f-335d1c82e3c2/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-11-25 15:44:52,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:44:52,359 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:44:52,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52 WrapperNode [2022-11-25 15:44:52,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:44:52,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:44:52,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:44:52,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:44:52,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,397 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-11-25 15:44:52,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:44:52,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:44:52,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:44:52,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:44:52,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,422 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:44:52,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:44:52,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:44:52,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:44:52,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (1/1) ... [2022-11-25 15:44:52,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:44:52,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:52,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:44:52,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:44:52,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:44:52,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:44:52,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:44:52,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:44:52,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:44:52,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:44:52,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:44:52,573 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:44:52,575 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:44:52,892 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:44:52,898 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:44:52,899 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:44:52,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:44:52 BoogieIcfgContainer [2022-11-25 15:44:52,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:44:52,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:44:52,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:44:52,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:44:52,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:44:52" (1/3) ... [2022-11-25 15:44:52,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2567e5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:44:52, skipping insertion in model container [2022-11-25 15:44:52,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:44:52" (2/3) ... [2022-11-25 15:44:52,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2567e5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:44:52, skipping insertion in model container [2022-11-25 15:44:52,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:44:52" (3/3) ... [2022-11-25 15:44:52,932 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2022-11-25 15:44:52,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:44:52,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:44:53,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:44:53,061 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;@3e01d44b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:44:53,062 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:44:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 15:44:53,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:53,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:53,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-11-25 15:44:53,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:53,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738040416] [2022-11-25 15:44:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:53,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:53,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:53,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738040416] [2022-11-25 15:44:53,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 15:44:53,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357092910] [2022-11-25 15:44:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:53,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:53,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:53,330 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:53,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:44:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 15:44:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:53,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:44:53,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357092910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:53,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:44:53,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:44:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202608446] [2022-11-25 15:44:53,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:53,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:44:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:53,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:44:53,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:44:53,560 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:53,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:53,583 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-11-25 15:44:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:44:53,586 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 15:44:53,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:53,600 INFO L225 Difference]: With dead ends: 42 [2022-11-25 15:44:53,601 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 15:44:53,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:44:53,611 INFO L413 NwaCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:53,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:44:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 15:44:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-25 15:44:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-25 15:44:53,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-11-25 15:44:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:53,713 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-25 15:44:53,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-25 15:44:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 15:44:53,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:53,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:53,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:53,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 15:44:53,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-11-25 15:44:53,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:53,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109529692] [2022-11-25 15:44:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:53,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:53,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109529692] [2022-11-25 15:44:53,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 15:44:53,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557400286] [2022-11-25 15:44:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:53,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:53,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:53,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:54,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:44:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:54,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:44:54,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:54,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:44:54,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557400286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:54,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:44:54,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:44:54,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21623881] [2022-11-25 15:44:54,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:54,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:44:54,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:44:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:44:54,178 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:54,281 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-25 15:44:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:44:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 15:44:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:54,290 INFO L225 Difference]: With dead ends: 42 [2022-11-25 15:44:54,290 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 15:44:54,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:44:54,293 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:54,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:44:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 15:44:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2022-11-25 15:44:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-25 15:44:54,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-11-25 15:44:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:54,309 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-25 15:44:54,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:54,310 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-25 15:44:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 15:44:54,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:54,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:54,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:54,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:54,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:54,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-11-25 15:44:54,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:54,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703786861] [2022-11-25 15:44:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:54,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:44:54,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [417243362] [2022-11-25 15:44:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:54,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:54,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:54,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:54,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:44:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:44:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:54,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:44:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:44:54,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:44:54,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:54,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703786861] [2022-11-25 15:44:54,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:44:54,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417243362] [2022-11-25 15:44:54,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417243362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:54,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:44:54,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 15:44:54,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215039007] [2022-11-25 15:44:54,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:54,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 15:44:54,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:54,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 15:44:54,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:44:54,824 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:54,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:54,960 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-25 15:44:54,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:44:54,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-25 15:44:54,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:54,962 INFO L225 Difference]: With dead ends: 38 [2022-11-25 15:44:54,962 INFO L226 Difference]: Without dead ends: 36 [2022-11-25 15:44:54,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:44:54,964 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:54,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:44:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-25 15:44:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-11-25 15:44:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-25 15:44:54,972 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2022-11-25 15:44:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:54,972 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-25 15:44:54,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-25 15:44:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 15:44:54,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:54,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:54,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 15:44:55,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:55,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2022-11-25 15:44:55,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:55,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64286834] [2022-11-25 15:44:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64286834] [2022-11-25 15:44:55,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 15:44:55,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96781036] [2022-11-25 15:44:55,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:55,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:55,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:55,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:55,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:44:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:55,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:44:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:44:55,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:44:55,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96781036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:44:55,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:44:55,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:44:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125412069] [2022-11-25 15:44:55,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:44:55,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:44:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:44:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:44:55,338 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:55,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:55,379 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-11-25 15:44:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:44:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-25 15:44:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:55,381 INFO L225 Difference]: With dead ends: 55 [2022-11-25 15:44:55,381 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 15:44:55,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:44:55,383 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:55,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:44:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 15:44:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-11-25 15:44:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-25 15:44:55,390 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-11-25 15:44:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:55,390 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-25 15:44:55,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-25 15:44:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 15:44:55,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:55,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:55,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:55,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:55,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:55,598 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-11-25 15:44:55,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:55,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460273478] [2022-11-25 15:44:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:55,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:44:55,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [955937985] [2022-11-25 15:44:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:55,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:55,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:55,627 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:55,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:44:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:44:55,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:55,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:55,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460273478] [2022-11-25 15:44:55,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:44:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955937985] [2022-11-25 15:44:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955937985] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:55,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:44:55,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-25 15:44:55,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445121265] [2022-11-25 15:44:55,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:55,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:44:55,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:44:55,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:44:55,859 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:56,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:56,072 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-11-25 15:44:56,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:44:56,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-25 15:44:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:56,077 INFO L225 Difference]: With dead ends: 70 [2022-11-25 15:44:56,077 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 15:44:56,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:44:56,082 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:56,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:44:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 15:44:56,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2022-11-25 15:44:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-25 15:44:56,098 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2022-11-25 15:44:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:56,099 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-25 15:44:56,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-25 15:44:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 15:44:56,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:56,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:56,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:56,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:56,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-11-25 15:44:56,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:56,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446729072] [2022-11-25 15:44:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:56,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:56,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:44:56,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717323745] [2022-11-25 15:44:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:56,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:56,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:56,348 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:56,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:44:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 15:44:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:56,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:44:56,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 15:44:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:56,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:56,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-25 15:44:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:44:56,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:56,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446729072] [2022-11-25 15:44:56,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:44:56,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717323745] [2022-11-25 15:44:56,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717323745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:56,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:44:56,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-25 15:44:56,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104489721] [2022-11-25 15:44:56,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:44:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:44:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:44:56,974 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:57,666 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2022-11-25 15:44:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 15:44:57,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 15:44:57,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:57,668 INFO L225 Difference]: With dead ends: 112 [2022-11-25 15:44:57,668 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 15:44:57,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:44:57,669 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:57,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 101 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 15:44:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 15:44:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2022-11-25 15:44:57,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:57,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-11-25 15:44:57,681 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2022-11-25 15:44:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:57,682 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-11-25 15:44:57,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:44:57,682 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-11-25 15:44:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 15:44:57,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:57,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:57,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:57,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 15:44:57,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:57,890 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-11-25 15:44:57,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:57,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453266428] [2022-11-25 15:44:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:57,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:57,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:44:57,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504945122] [2022-11-25 15:44:57,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:57,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:57,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:57,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:44:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 15:44:58,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:58,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 15:44:58,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:44:58,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:44:58,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 15:44:58,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 15:44:58,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:44:58,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-25 15:44:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:44:58,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453266428] [2022-11-25 15:45:00,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:45:00,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504945122] [2022-11-25 15:45:00,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504945122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:00,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:45:00,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2022-11-25 15:45:00,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072369354] [2022-11-25 15:45:00,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:00,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 15:45:00,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 15:45:00,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:45:00,040 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:08,452 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2022-11-25 15:45:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 15:45:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-25 15:45:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:08,455 INFO L225 Difference]: With dead ends: 175 [2022-11-25 15:45:08,456 INFO L226 Difference]: Without dead ends: 173 [2022-11-25 15:45:08,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=666, Invalid=2304, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 15:45:08,458 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 414 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:08,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 175 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 15:45:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-25 15:45:08,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2022-11-25 15:45:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:08,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2022-11-25 15:45:08,477 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 28 [2022-11-25 15:45:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:08,477 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2022-11-25 15:45:08,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2022-11-25 15:45:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 15:45:08,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:08,479 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:08,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:08,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:08,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2022-11-25 15:45:08,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:08,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480580386] [2022-11-25 15:45:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:08,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:45:08,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680903663] [2022-11-25 15:45:08,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:45:08,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:08,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:08,744 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:08,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:45:08,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:45:08,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:08,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:45:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:45:08,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:45:09,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:09,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480580386] [2022-11-25 15:45:09,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:45:09,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680903663] [2022-11-25 15:45:09,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680903663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:09,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:45:09,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-25 15:45:09,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761681180] [2022-11-25 15:45:09,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:45:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:45:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:45:09,054 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:09,252 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2022-11-25 15:45:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:45:09,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 15:45:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:09,254 INFO L225 Difference]: With dead ends: 190 [2022-11-25 15:45:09,254 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 15:45:09,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:45:09,256 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:09,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 59 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:45:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 15:45:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2022-11-25 15:45:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.21875) internal successors, (117), 96 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2022-11-25 15:45:09,280 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 32 [2022-11-25 15:45:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:09,280 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2022-11-25 15:45:09,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2022-11-25 15:45:09,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 15:45:09,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:09,282 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:09,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:09,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 15:45:09,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2022-11-25 15:45:09,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:09,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250954498] [2022-11-25 15:45:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:09,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:45:09,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944583282] [2022-11-25 15:45:09,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:45:09,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:09,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:09,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:09,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:45:09,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:45:09,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:45:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:45:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:45:09,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:09,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250954498] [2022-11-25 15:45:09,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:45:09,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944583282] [2022-11-25 15:45:09,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944583282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:09,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:45:09,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-25 15:45:09,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190094921] [2022-11-25 15:45:09,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:09,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:45:09,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:45:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:45:09,906 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:10,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:10,276 INFO L93 Difference]: Finished difference Result 236 states and 273 transitions. [2022-11-25 15:45:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:45:10,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-25 15:45:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:10,278 INFO L225 Difference]: With dead ends: 236 [2022-11-25 15:45:10,279 INFO L226 Difference]: Without dead ends: 177 [2022-11-25 15:45:10,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:45:10,283 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 141 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:10,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 92 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:45:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-25 15:45:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2022-11-25 15:45:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 133 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:10,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2022-11-25 15:45:10,325 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 36 [2022-11-25 15:45:10,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:10,325 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2022-11-25 15:45:10,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:10,326 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2022-11-25 15:45:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 15:45:10,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:10,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:10,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:10,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:10,534 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2022-11-25 15:45:10,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:10,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139800186] [2022-11-25 15:45:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:10,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:10,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:45:10,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855663667] [2022-11-25 15:45:10,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:45:10,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:10,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:10,578 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:10,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:45:10,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:45:10,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:10,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:45:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:45:11,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:45:11,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139800186] [2022-11-25 15:45:11,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:45:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855663667] [2022-11-25 15:45:11,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855663667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:11,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:45:11,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-11-25 15:45:11,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758965043] [2022-11-25 15:45:11,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:11,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:45:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:45:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:45:11,233 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:12,057 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2022-11-25 15:45:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 15:45:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-25 15:45:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:12,059 INFO L225 Difference]: With dead ends: 171 [2022-11-25 15:45:12,059 INFO L226 Difference]: Without dead ends: 162 [2022-11-25 15:45:12,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 15:45:12,060 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:12,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 92 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:45:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-25 15:45:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2022-11-25 15:45:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 133 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2022-11-25 15:45:12,087 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 37 [2022-11-25 15:45:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:12,087 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2022-11-25 15:45:12,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2022-11-25 15:45:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 15:45:12,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:12,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:12,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:12,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:12,296 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:12,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2022-11-25 15:45:12,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:12,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161393672] [2022-11-25 15:45:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:12,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:12,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:45:12,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468524817] [2022-11-25 15:45:12,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:45:12,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:12,349 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:12,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:45:12,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:45:12,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:45:12,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-25 15:45:12,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:12,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 15:45:12,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:45:12,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-11-25 15:45:12,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:45:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:12,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:12,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-11-25 15:45:12,818 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 15:45:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:12,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 15:45:13,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-25 15:45:13,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 141 [2022-11-25 15:45:13,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:45:13,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 201 [2022-11-25 15:45:13,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 115 [2022-11-25 15:45:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:45:13,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:45:13,482 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-25 15:45:13,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 60 [2022-11-25 15:45:13,964 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-25 15:45:13,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 45 [2022-11-25 15:45:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:13,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 27 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:45:30,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:30,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161393672] [2022-11-25 15:45:30,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:45:30,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468524817] [2022-11-25 15:45:30,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468524817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:45:30,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:45:30,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-11-25 15:45:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150713130] [2022-11-25 15:45:30,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:30,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 15:45:30,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:30,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 15:45:30,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=949, Unknown=1, NotChecked=0, Total=1122 [2022-11-25 15:45:30,663 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:45:39,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:04,018 WARN L233 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 162 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:46:07,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:46:26,632 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 124 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:46:48,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-25 15:46:51,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:47:11,793 WARN L233 SmtUtils]: Spent 7.46s on a formula simplification. DAG size of input: 164 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:47:14,412 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse23 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (.cse35 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (let ((.cse32 (+ .cse35 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (+ .cse35 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse33 (* (mod .cse23 4294967296) 8)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse34 (* 8 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)))) (let ((.cse11 (select .cse6 (+ .cse34 |c_ULTIMATE.start_main_~b~0#1.offset|))) (.cse31 (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse34))) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse30 (+ .cse33 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse18 (select .cse6 .cse7)) (.cse19 (select .cse0 .cse32))) (let ((.cse16 (store .cse0 .cse30 (+ 2 .cse18 .cse19))) (.cse17 (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (.cse12 (+ .cse33 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse24 (select .cse0 .cse4)) (.cse13 (+ c_~N~0 9)) (.cse14 (store .cse0 .cse32 (+ 2 .cse11 .cse31))) (.cse15 (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (and (= (+ c_~N~0 1) (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) (forall ((~N~0 Int) (v_ArrVal_291 Int)) (= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store .cse6 .cse7 v_ArrVal_291)))) (let ((.cse3 (store (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) (let ((.cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse3 .cse4 (+ .cse1 3 ~N~0))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5))))) 4)) (or (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((~N~0 Int) (v_ArrVal_291 Int)) (= (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (store .cse6 .cse7 (+ 2 .cse11)) .cse12 v_ArrVal_291)))) (let ((.cse9 (store (select .cse8 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) (let ((.cse10 (select (select (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| .cse9) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ (select (select (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse9 .cse4 (+ 3 ~N~0 .cse10))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5) .cse10)))) 4))) (= .cse13 (select .cse14 .cse15)) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= .cse13 (select .cse16 .cse15)) (= (select .cse6 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (= .cse13 (select (store .cse16 (+ .cse17 |c_ULTIMATE.start_main_~a~0#1.offset|) (+ .cse18 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse16) |c_ULTIMATE.start_main_~b~0#1.base|) .cse12) 4 .cse19)) .cse15)) (not (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (or (forall ((~N~0 Int) (v_ArrVal_291 Int)) (= (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (store .cse6 .cse12 (+ 2 .cse18)) (+ .cse17 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_291)))) (let ((.cse22 (store (select .cse21 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) (let ((.cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~a~0#1.base| .cse22) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse22 .cse4 (+ .cse20 3 ~N~0))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5))))) 4)) (= .cse23 0)) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= .cse24 (+ c_~N~0 4)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((~N~0 Int) (v_ArrVal_291 Int)) (= 4 (let ((.cse26 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store .cse6 .cse12 v_ArrVal_291)))) (let ((.cse27 (store (select .cse26 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) (let ((.cse25 (select (select (store .cse26 |c_ULTIMATE.start_main_~a~0#1.base| .cse27) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse25 (select (select (store .cse26 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse27 .cse4 (+ .cse25 3 ~N~0))) |c_ULTIMATE.start_main_~b~0#1.base|) .cse5))))))) (exists ((|ULTIMATE.start_main_~b~0#1.base| Int)) (let ((.cse29 (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse28 (select .cse29 8))) (and (= .cse28 3) (= .cse24 (+ c_~N~0 3 (select .cse29 0))) (= (select .cse0 .cse15) (+ .cse28 .cse24 2)))))) (= .cse13 (select (store .cse14 .cse30 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~b~0#1.base|) .cse7) .cse11 4 .cse31)) .cse15)) (= 3 (select .cse6 .cse5))))))) is different from true [2022-11-25 15:47:26,246 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 151 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:47:39,935 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 149 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:47:49,306 WARN L233 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 152 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:47:52,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:19,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 15:48:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:48:31,974 INFO L93 Difference]: Finished difference Result 475 states and 545 transitions. [2022-11-25 15:48:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 15:48:31,974 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-25 15:48:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:48:31,976 INFO L225 Difference]: With dead ends: 475 [2022-11-25 15:48:31,976 INFO L226 Difference]: Without dead ends: 293 [2022-11-25 15:48:31,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 158.0s TimeCoverageRelationStatistics Valid=1315, Invalid=6163, Unknown=8, NotChecked=170, Total=7656 [2022-11-25 15:48:31,979 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 642 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 206 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 38.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:48:31,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 348 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 933 Invalid, 6 Unknown, 10 Unchecked, 38.2s Time] [2022-11-25 15:48:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-25 15:48:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 104. [2022-11-25 15:48:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 103 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2022-11-25 15:48:32,014 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 38 [2022-11-25 15:48:32,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:48:32,015 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2022-11-25 15:48:32,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2022-11-25 15:48:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 15:48:32,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:48:32,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:32,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:32,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:32,223 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:48:32,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:32,223 INFO L85 PathProgramCache]: Analyzing trace with hash 587620898, now seen corresponding path program 3 times [2022-11-25 15:48:32,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:32,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849443045] [2022-11-25 15:48:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:32,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:32,253 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:48:32,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933561958] [2022-11-25 15:48:32,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:48:32,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:32,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:32,255 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:32,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:48:33,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 15:48:33,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:48:33,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:48:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 51 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:33,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 51 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:34,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:34,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849443045] [2022-11-25 15:48:34,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:48:34,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933561958] [2022-11-25 15:48:34,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933561958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:34,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:48:34,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2022-11-25 15:48:34,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785103756] [2022-11-25 15:48:34,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:34,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 15:48:34,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 15:48:34,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-11-25 15:48:34,111 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:48:35,503 INFO L93 Difference]: Finished difference Result 264 states and 288 transitions. [2022-11-25 15:48:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 15:48:35,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-25 15:48:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:48:35,505 INFO L225 Difference]: With dead ends: 264 [2022-11-25 15:48:35,505 INFO L226 Difference]: Without dead ends: 210 [2022-11-25 15:48:35,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=359, Invalid=1047, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 15:48:35,506 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 462 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:48:35,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 170 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 15:48:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-25 15:48:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 127. [2022-11-25 15:48:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.126984126984127) internal successors, (142), 126 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 142 transitions. [2022-11-25 15:48:35,551 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 142 transitions. Word has length 42 [2022-11-25 15:48:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:48:35,551 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 142 transitions. [2022-11-25 15:48:35,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 142 transitions. [2022-11-25 15:48:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 15:48:35,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:48:35,553 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:35,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:35,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:35,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:48:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:35,761 INFO L85 PathProgramCache]: Analyzing trace with hash 388390859, now seen corresponding path program 5 times [2022-11-25 15:48:35,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:35,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920262766] [2022-11-25 15:48:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:35,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:35,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:48:35,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885744527] [2022-11-25 15:48:35,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:48:35,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:35,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:35,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:35,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:48:38,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-25 15:48:38,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:48:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:48:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:38,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:48:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:48:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:48:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920262766] [2022-11-25 15:48:39,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 15:48:39,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885744527] [2022-11-25 15:48:39,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885744527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:48:39,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:48:39,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2022-11-25 15:48:39,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662366797] [2022-11-25 15:48:39,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:48:39,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:48:39,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:48:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:48:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:48:39,039 INFO L87 Difference]: Start difference. First operand 127 states and 142 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:48:40,432 INFO L93 Difference]: Finished difference Result 271 states and 296 transitions. [2022-11-25 15:48:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 15:48:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-25 15:48:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:48:40,434 INFO L225 Difference]: With dead ends: 271 [2022-11-25 15:48:40,434 INFO L226 Difference]: Without dead ends: 151 [2022-11-25 15:48:40,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 15:48:40,436 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 209 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:48:40,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 190 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 15:48:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-25 15:48:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2022-11-25 15:48:40,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.063063063063063) internal successors, (118), 111 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2022-11-25 15:48:40,471 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 43 [2022-11-25 15:48:40,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:48:40,471 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2022-11-25 15:48:40,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:48:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2022-11-25 15:48:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 15:48:40,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:48:40,473 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:48:40,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:48:40,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 15:48:40,677 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:48:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:48:40,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1846236060, now seen corresponding path program 6 times [2022-11-25 15:48:40,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:48:40,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084261772] [2022-11-25 15:48:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:48:40,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:48:40,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 15:48:40,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377567121] [2022-11-25 15:48:40,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:48:40,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:48:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:48:40,709 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:48:40,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cface71-8831-41a5-b69f-335d1c82e3c2/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:48:41,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-25 15:48:41,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:48:41,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 15:48:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:48:41,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 15:48:41,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:48:41,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-11-25 15:48:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:48:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:41,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:41,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:41,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:41,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2022-11-25 15:48:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:41,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 42 [2022-11-25 15:48:42,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 120 [2022-11-25 15:48:42,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 201 [2022-11-25 15:48:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 92 [2022-11-25 15:48:42,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 64 [2022-11-25 15:48:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 134 [2022-11-25 15:48:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:42,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-11-25 15:48:43,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 148 [2022-11-25 15:48:43,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:48:43,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 201 [2022-11-25 15:48:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 105 [2022-11-25 15:48:43,887 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-25 15:48:43,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 202 treesize of output 182 [2022-11-25 15:48:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:43,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 245 [2022-11-25 15:48:43,933 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 15:48:44,467 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-25 15:48:44,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 195 treesize of output 169 [2022-11-25 15:48:44,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:48:44,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:48:44,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 242 [2022-11-25 15:48:44,518 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 15:48:46,552 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-25 15:48:46,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 131 treesize of output 59 [2022-11-25 15:48:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:48:46,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:05,305 WARN L233 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 105 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:49:50,399 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 149 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:50:36,353 WARN L233 SmtUtils]: Spent 14.58s on a formula simplification. DAG size of input: 161 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:51:01,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272420787110 treesize of output 267810591654