./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:43:21,154 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:43:21,240 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:43:21,245 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:43:21,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:43:21,277 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:43:21,278 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:43:21,278 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:43:21,279 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:43:21,280 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:43:21,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:43:21,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:43:21,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:43:21,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:43:21,283 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:43:21,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:43:21,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:43:21,285 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:43:21,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:43:21,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:43:21,287 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:43:21,292 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:43:21,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:43:21,293 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:43:21,298 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:43:21,298 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:43:21,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:43:21,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:43:21,300 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:43:21,301 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:43:21,302 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:43:21,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:43:21,303 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:43:21,303 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:43:21,303 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:43:21,304 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:43:21,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:43:21,304 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:43:21,304 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:43:21,305 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:43:21,305 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:43:21,305 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:43:21,306 INFO L153 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_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2023-11-23 22:43:21,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:43:21,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:43:21,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:43:21,617 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:43:21,619 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:43:21,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/array-fpi/ifeqn4.c [2023-11-23 22:43:24,819 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:43:25,061 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:43:25,064 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/sv-benchmarks/c/array-fpi/ifeqn4.c [2023-11-23 22:43:25,081 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/data/da69793d8/505e5894a3eb4d1da3b17a61e921200b/FLAGf54c8348f [2023-11-23 22:43:25,096 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/data/da69793d8/505e5894a3eb4d1da3b17a61e921200b [2023-11-23 22:43:25,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:43:25,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:43:25,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:43:25,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:43:25,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:43:25,109 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242d7464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25, skipping insertion in model container [2023-11-23 22:43:25,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,133 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:43:25,282 WARN L240 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_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2023-11-23 22:43:25,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:43:25,316 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:43:25,330 WARN L240 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_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/sv-benchmarks/c/array-fpi/ifeqn4.c[589,602] [2023-11-23 22:43:25,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:43:25,356 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:43:25,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25 WrapperNode [2023-11-23 22:43:25,357 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:43:25,358 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:43:25,359 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:43:25,359 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:43:25,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,397 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-23 22:43:25,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:43:25,398 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:43:25,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:43:25,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:43:25,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,416 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,429 INFO L189 HeapSplitter]: Split 10 memory accesses to 3 slices as follows [2, 4, 4] [2023-11-23 22:43:25,429 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,429 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,438 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,442 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,444 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,445 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,448 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:43:25,449 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:43:25,450 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:43:25,450 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:43:25,451 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (1/1) ... [2023-11-23 22:43:25,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:43:25,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:25,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:43:25,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:43:25,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:43:25,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:43:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:43:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:43:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:43:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:43:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:43:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:43:25,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:43:25,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:43:25,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 22:43:25,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 22:43:25,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 22:43:25,604 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:43:25,607 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:43:25,795 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:43:25,821 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:43:25,822 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 22:43:25,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:43:25 BoogieIcfgContainer [2023-11-23 22:43:25,823 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:43:25,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:43:25,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:43:25,830 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:43:25,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:43:25" (1/3) ... [2023-11-23 22:43:25,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab12b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:43:25, skipping insertion in model container [2023-11-23 22:43:25,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:25" (2/3) ... [2023-11-23 22:43:25,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab12b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:43:25, skipping insertion in model container [2023-11-23 22:43:25,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:43:25" (3/3) ... [2023-11-23 22:43:25,835 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2023-11-23 22:43:25,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:43:25,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:43:25,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:43:25,921 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=LoopHeads, 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;@2e5c0a2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:43:25,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:43:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 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) [2023-11-23 22:43:25,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 22:43:25,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:25,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:25,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:25,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash 323884275, now seen corresponding path program 1 times [2023-11-23 22:43:25,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:25,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215925812] [2023-11-23 22:43:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:25,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:26,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:26,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215925812] [2023-11-23 22:43:26,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:43:26,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596759779] [2023-11-23 22:43:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:26,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:26,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:26,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:26,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:43:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:26,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 22:43:26,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:26,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:43:26,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596759779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:26,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:26,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:43:26,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471524238] [2023-11-23 22:43:26,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:43:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:43:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:43:26,367 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-11-23 22:43:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:26,414 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2023-11-23 22:43:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:43:26,417 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2023-11-23 22:43:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:26,428 INFO L225 Difference]: With dead ends: 37 [2023-11-23 22:43:26,429 INFO L226 Difference]: Without dead ends: 17 [2023-11-23 22:43:26,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:43:26,437 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:26,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:43:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-23 22:43:26,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-23 22:43:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-11-23 22:43:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-23 22:43:26,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2023-11-23 22:43:26,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:26,481 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-23 22:43:26,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-11-23 22:43:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-23 22:43:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 22:43:26,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:26,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:26,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:26,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 22:43:26,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:26,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash 993783914, now seen corresponding path program 1 times [2023-11-23 22:43:26,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:26,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838979486] [2023-11-23 22:43:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:26,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:26,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:26,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838979486] [2023-11-23 22:43:26,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 22:43:26,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257129865] [2023-11-23 22:43:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:26,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:26,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:26,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:26,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:43:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:26,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:43:26,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:26,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:43:26,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257129865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:26,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:26,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:43:26,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650154742] [2023-11-23 22:43:26,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:26,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:43:26,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:43:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:43:26,985 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-11-23 22:43:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:27,052 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-11-23 22:43:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:43:27,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2023-11-23 22:43:27,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:27,054 INFO L225 Difference]: With dead ends: 38 [2023-11-23 22:43:27,054 INFO L226 Difference]: Without dead ends: 28 [2023-11-23 22:43:27,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:43:27,056 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:27,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 11 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:43:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-23 22:43:27,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2023-11-23 22:43:27,063 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) [2023-11-23 22:43:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-23 22:43:27,064 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2023-11-23 22:43:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:27,065 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-23 22:43:27,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-11-23 22:43:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-23 22:43:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 22:43:27,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:27,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:27,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 22:43:27,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:27,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:27,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:27,284 INFO L85 PathProgramCache]: Analyzing trace with hash 334138833, now seen corresponding path program 1 times [2023-11-23 22:43:27,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:27,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150948061] [2023-11-23 22:43:27,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:27,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:27,312 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:27,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048721394] [2023-11-23 22:43:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:27,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:27,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:27,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:27,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:43:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:27,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:43:27,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:27,464 INFO L378 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 11 treesize of output 7 [2023-11-23 22:43:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:27,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:43:27,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150948061] [2023-11-23 22:43:27,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:43:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048721394] [2023-11-23 22:43:27,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048721394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:27,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:27,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:43:27,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620134869] [2023-11-23 22:43:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:43:27,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:43:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:43:27,558 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:43:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:27,643 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-11-23 22:43:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:43:27,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 17 [2023-11-23 22:43:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:27,645 INFO L225 Difference]: With dead ends: 33 [2023-11-23 22:43:27,645 INFO L226 Difference]: Without dead ends: 31 [2023-11-23 22:43:27,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:43:27,650 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:27,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:43:27,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-23 22:43:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-11-23 22:43:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2023-11-23 22:43:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-23 22:43:27,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2023-11-23 22:43:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:27,673 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-23 22:43:27,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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) [2023-11-23 22:43:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-23 22:43:27,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 22:43:27,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:27,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:27,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:27,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:27,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:27,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:27,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2109146195, now seen corresponding path program 1 times [2023-11-23 22:43:27,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:27,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460291736] [2023-11-23 22:43:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:27,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:27,920 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:27,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298613908] [2023-11-23 22:43:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:27,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:27,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:27,923 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:27,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:43:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:28,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:43:28,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:28,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 22:43:28,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460291736] [2023-11-23 22:43:28,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:43:28,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298613908] [2023-11-23 22:43:28,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298613908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:28,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:28,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:43:28,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701356569] [2023-11-23 22:43:28,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:28,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:43:28,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:43:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:43:28,027 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-23 22:43:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:28,079 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-11-23 22:43:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:43:28,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2023-11-23 22:43:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:28,082 INFO L225 Difference]: With dead ends: 51 [2023-11-23 22:43:28,082 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 22:43:28,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:43:28,085 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:28,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:43:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 22:43:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-11-23 22:43:28,091 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) [2023-11-23 22:43:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-23 22:43:28,092 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2023-11-23 22:43:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:28,092 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-23 22:43:28,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-11-23 22:43:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-23 22:43:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 22:43:28,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:28,093 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:28,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:28,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:28,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:28,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:28,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1399034495, now seen corresponding path program 1 times [2023-11-23 22:43:28,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:28,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206351304] [2023-11-23 22:43:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:28,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:28,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:28,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431168405] [2023-11-23 22:43:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:28,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:28,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:28,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:28,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:43:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:28,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:43:28,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:28,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:43:28,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:28,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206351304] [2023-11-23 22:43:28,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:43:28,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431168405] [2023-11-23 22:43:28,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431168405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:28,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:43:28,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-11-23 22:43:28,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596864260] [2023-11-23 22:43:28,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:28,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:43:28,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:43:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:43:28,598 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2023-11-23 22:43:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:28,794 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-11-23 22:43:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:43:28,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) Word has length 20 [2023-11-23 22:43:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:28,796 INFO L225 Difference]: With dead ends: 64 [2023-11-23 22:43:28,796 INFO L226 Difference]: Without dead ends: 39 [2023-11-23 22:43:28,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:43:28,798 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:28,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:43:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-23 22:43:28,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2023-11-23 22:43:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-11-23 22:43:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-23 22:43:28,809 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2023-11-23 22:43:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:28,809 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-23 22:43:28,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2023-11-23 22:43:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-23 22:43:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 22:43:28,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:28,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:28,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:29,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:29,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:29,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1256903054, now seen corresponding path program 1 times [2023-11-23 22:43:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:29,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92947543] [2023-11-23 22:43:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:29,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:29,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:29,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051753204] [2023-11-23 22:43:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:29,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:29,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:29,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:29,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:43:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:29,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 22:43:29,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:29,235 INFO L378 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 11 treesize of output 7 [2023-11-23 22:43:29,306 INFO L378 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 19 treesize of output 15 [2023-11-23 22:43:29,314 INFO L378 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 27 treesize of output 11 [2023-11-23 22:43:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:29,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:29,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:29,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 163 [2023-11-23 22:43:29,830 INFO L378 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 22 treesize of output 20 [2023-11-23 22:43:29,842 INFO L378 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 21 treesize of output 19 [2023-11-23 22:43:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:43:29,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92947543] [2023-11-23 22:43:29,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:43:29,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051753204] [2023-11-23 22:43:29,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051753204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:29,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:43:29,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-23 22:43:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211391946] [2023-11-23 22:43:29,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:29,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:43:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:43:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:43:29,878 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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) [2023-11-23 22:43:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:30,607 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2023-11-23 22:43:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 22:43:30,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 23 [2023-11-23 22:43:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:30,608 INFO L225 Difference]: With dead ends: 101 [2023-11-23 22:43:30,608 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 22:43:30,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-23 22:43:30,610 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:30,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 86 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:43:30,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 22:43:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 38. [2023-11-23 22:43:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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) [2023-11-23 22:43:30,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-11-23 22:43:30,623 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2023-11-23 22:43:30,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:30,623 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-11-23 22:43:30,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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) [2023-11-23 22:43:30,623 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-11-23 22:43:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 22:43:30,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:30,624 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] [2023-11-23 22:43:30,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:30,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:30,825 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:30,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:30,826 INFO L85 PathProgramCache]: Analyzing trace with hash 879178916, now seen corresponding path program 1 times [2023-11-23 22:43:30,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:30,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185256488] [2023-11-23 22:43:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:30,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:30,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:30,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249695682] [2023-11-23 22:43:30,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:30,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:30,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:30,858 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:30,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:43:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:30,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 22:43:30,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:31,009 INFO L378 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 11 treesize of output 7 [2023-11-23 22:43:31,052 INFO L378 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 21 treesize of output 20 [2023-11-23 22:43:31,120 INFO L378 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 11 treesize of output 7 [2023-11-23 22:43:31,213 INFO L378 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 21 treesize of output 20 [2023-11-23 22:43:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:31,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:31,827 INFO L378 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 48 treesize of output 44 [2023-11-23 22:43:31,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:31,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 73 [2023-11-23 22:43:32,286 INFO L378 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 37 treesize of output 33 [2023-11-23 22:43:32,290 INFO L378 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 29 treesize of output 20 [2023-11-23 22:43:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:32,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:32,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185256488] [2023-11-23 22:43:32,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:43:32,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249695682] [2023-11-23 22:43:32,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249695682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:32,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:43:32,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-23 22:43:32,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300781241] [2023-11-23 22:43:32,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:32,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 22:43:32,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 22:43:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-11-23 22:43:32,346 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2023-11-23 22:43:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:37,403 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2023-11-23 22:43:37,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-23 22:43:37,403 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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 26 [2023-11-23 22:43:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:37,405 INFO L225 Difference]: With dead ends: 154 [2023-11-23 22:43:37,406 INFO L226 Difference]: Without dead ends: 152 [2023-11-23 22:43:37,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=658, Invalid=2534, Unknown=0, NotChecked=0, Total=3192 [2023-11-23 22:43:37,409 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 393 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:37,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 138 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 22:43:37,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-23 22:43:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 67. [2023-11-23 22:43:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 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) [2023-11-23 22:43:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2023-11-23 22:43:37,435 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 26 [2023-11-23 22:43:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:37,436 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2023-11-23 22:43:37,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 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) [2023-11-23 22:43:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2023-11-23 22:43:37,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 22:43:37,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:37,438 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:37,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:37,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:37,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:37,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash 913699278, now seen corresponding path program 2 times [2023-11-23 22:43:37,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:37,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993949001] [2023-11-23 22:43:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:37,719 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:37,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816981908] [2023-11-23 22:43:37,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:43:37,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:37,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:37,727 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:37,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:43:37,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:43:37,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:43:37,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 22:43:37,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:43:38,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:43:38,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993949001] [2023-11-23 22:43:38,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:43:38,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816981908] [2023-11-23 22:43:38,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816981908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:38,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:43:38,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-23 22:43:38,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707787775] [2023-11-23 22:43:38,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:38,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:43:38,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:38,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:43:38,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:43:38,128 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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) [2023-11-23 22:43:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:38,385 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2023-11-23 22:43:38,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:43:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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 29 [2023-11-23 22:43:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:38,392 INFO L225 Difference]: With dead ends: 136 [2023-11-23 22:43:38,393 INFO L226 Difference]: Without dead ends: 92 [2023-11-23 22:43:38,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:43:38,396 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:38,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 73 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:43:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-23 22:43:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2023-11-23 22:43:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 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) [2023-11-23 22:43:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2023-11-23 22:43:38,438 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 29 [2023-11-23 22:43:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:38,438 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2023-11-23 22:43:38,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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) [2023-11-23 22:43:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2023-11-23 22:43:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 22:43:38,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:38,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:38,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:38,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:38,662 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:38,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1445040975, now seen corresponding path program 3 times [2023-11-23 22:43:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237280445] [2023-11-23 22:43:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:38,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:38,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841767007] [2023-11-23 22:43:38,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:43:38,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:38,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:38,701 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:38,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:43:39,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 22:43:39,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:43:39,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-23 22:43:39,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:39,319 INFO L378 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 11 treesize of output 7 [2023-11-23 22:43:39,438 INFO L378 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 19 treesize of output 18 [2023-11-23 22:43:39,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:39,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-23 22:43:39,939 INFO L378 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 11 treesize of output 7 [2023-11-23 22:43:40,151 INFO L378 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 19 treesize of output 18 [2023-11-23 22:43:40,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:40,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-23 22:43:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:40,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:42,325 INFO L378 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 97 treesize of output 91 [2023-11-23 22:43:42,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:42,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 265 treesize of output 247 [2023-11-23 22:43:43,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:43,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:43,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237280445] [2023-11-23 22:43:43,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:43:43,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841767007] [2023-11-23 22:43:43,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841767007] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:43,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:43:43,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 46 [2023-11-23 22:43:43,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463776408] [2023-11-23 22:43:43,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:43,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-23 22:43:43,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-23 22:43:43,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1683, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 22:43:43,461 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 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) [2023-11-23 22:43:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:54,058 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2023-11-23 22:43:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-23 22:43:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 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 35 [2023-11-23 22:43:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:54,060 INFO L225 Difference]: With dead ends: 201 [2023-11-23 22:43:54,061 INFO L226 Difference]: Without dead ends: 112 [2023-11-23 22:43:54,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2411 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1714, Invalid=6476, Unknown=0, NotChecked=0, Total=8190 [2023-11-23 22:43:54,068 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 272 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:54,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 162 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 22:43:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-23 22:43:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2023-11-23 22:43:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 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) [2023-11-23 22:43:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2023-11-23 22:43:54,110 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 35 [2023-11-23 22:43:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:54,110 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2023-11-23 22:43:54,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.5) internal successors, (69), 46 states have internal predecessors, (69), 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) [2023-11-23 22:43:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2023-11-23 22:43:54,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 22:43:54,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:54,112 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] [2023-11-23 22:43:54,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:54,321 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:54,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1993895340, now seen corresponding path program 4 times [2023-11-23 22:43:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:54,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829419388] [2023-11-23 22:43:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:54,372 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:54,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247990835] [2023-11-23 22:43:54,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:43:54,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:54,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:54,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:54,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:43:54,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:43:54,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:43:54,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:43:54,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:43:54,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:43:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:43:54,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:54,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829419388] [2023-11-23 22:43:54,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:43:54,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247990835] [2023-11-23 22:43:54,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247990835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:43:54,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:43:54,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2023-11-23 22:43:54,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586795712] [2023-11-23 22:43:54,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:43:54,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 22:43:54,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:54,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 22:43:54,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-11-23 22:43:54,719 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 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) [2023-11-23 22:43:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:43:55,221 INFO L93 Difference]: Finished difference Result 195 states and 225 transitions. [2023-11-23 22:43:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 22:43:55,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 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 35 [2023-11-23 22:43:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:43:55,223 INFO L225 Difference]: With dead ends: 195 [2023-11-23 22:43:55,223 INFO L226 Difference]: Without dead ends: 110 [2023-11-23 22:43:55,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=254, Invalid=676, Unknown=0, NotChecked=0, Total=930 [2023-11-23 22:43:55,225 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:43:55,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 108 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:43:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-23 22:43:55,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 67. [2023-11-23 22:43:55,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 66 states have internal predecessors, (72), 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) [2023-11-23 22:43:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2023-11-23 22:43:55,259 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 35 [2023-11-23 22:43:55,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:43:55,259 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2023-11-23 22:43:55,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 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) [2023-11-23 22:43:55,260 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2023-11-23 22:43:55,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 22:43:55,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:43:55,261 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:43:55,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:43:55,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:55,481 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:43:55,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1534705028, now seen corresponding path program 5 times [2023-11-23 22:43:55,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:55,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23700400] [2023-11-23 22:43:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:55,513 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:43:55,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569875589] [2023-11-23 22:43:55,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 22:43:55,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:43:55,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:55,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:43:55,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:43:56,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-23 22:43:56,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:43:56,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-23 22:43:56,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:43:56,570 INFO L378 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 11 treesize of output 7 [2023-11-23 22:43:56,627 INFO L378 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 19 treesize of output 18 [2023-11-23 22:43:56,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:56,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-23 22:43:56,851 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:56,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-23 22:43:56,984 INFO L378 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 11 treesize of output 7 [2023-11-23 22:43:57,126 INFO L378 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 19 treesize of output 18 [2023-11-23 22:43:57,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:57,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-23 22:43:57,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:43:57,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-23 22:43:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:57,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:44:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:44:01,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:44:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23700400] [2023-11-23 22:44:01,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:44:01,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569875589] [2023-11-23 22:44:01,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569875589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:44:01,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:44:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-11-23 22:44:01,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982764423] [2023-11-23 22:44:01,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:44:01,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 22:44:01,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:44:01,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 22:44:01,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 22:44:01,481 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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) [2023-11-23 22:44:17,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:44:17,690 INFO L93 Difference]: Finished difference Result 210 states and 226 transitions. [2023-11-23 22:44:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-23 22:44:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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 [2023-11-23 22:44:17,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:44:17,692 INFO L225 Difference]: With dead ends: 210 [2023-11-23 22:44:17,692 INFO L226 Difference]: Without dead ends: 208 [2023-11-23 22:44:17,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1129, Invalid=3983, Unknown=0, NotChecked=0, Total=5112 [2023-11-23 22:44:17,696 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 575 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-23 22:44:17,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 316 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-11-23 22:44:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-11-23 22:44:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 105. [2023-11-23 22:44:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.125) internal successors, (117), 104 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) [2023-11-23 22:44:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2023-11-23 22:44:17,776 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 38 [2023-11-23 22:44:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:44:17,776 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2023-11-23 22:44:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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) [2023-11-23 22:44:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2023-11-23 22:44:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 22:44:17,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:44:17,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:44:17,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:44:17,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:44:17,981 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:44:17,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:44:17,981 INFO L85 PathProgramCache]: Analyzing trace with hash -896920919, now seen corresponding path program 6 times [2023-11-23 22:44:17,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:44:17,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876485816] [2023-11-23 22:44:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:44:17,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:44:18,011 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:44:18,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041084554] [2023-11-23 22:44:18,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 22:44:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:44:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:44:18,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:44:18,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:44:18,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-23 22:44:18,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:44:18,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:44:18,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:44:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 22:44:18,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:44:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 22:44:18,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:44:18,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876485816] [2023-11-23 22:44:18,690 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:44:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041084554] [2023-11-23 22:44:18,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041084554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:44:18,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:44:18,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-11-23 22:44:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684917946] [2023-11-23 22:44:18,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:44:18,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 22:44:18,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:44:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 22:44:18,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:44:18,694 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2023-11-23 22:44:19,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:44:19,011 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2023-11-23 22:44:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:44:19,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 41 [2023-11-23 22:44:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:44:19,015 INFO L225 Difference]: With dead ends: 143 [2023-11-23 22:44:19,015 INFO L226 Difference]: Without dead ends: 127 [2023-11-23 22:44:19,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2023-11-23 22:44:19,017 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:44:19,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:44:19,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-23 22:44:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2023-11-23 22:44:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 states have internal predecessors, (115), 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) [2023-11-23 22:44:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2023-11-23 22:44:19,081 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 41 [2023-11-23 22:44:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:44:19,081 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2023-11-23 22:44:19,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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) [2023-11-23 22:44:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2023-11-23 22:44:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 22:44:19,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:44:19,083 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:44:19,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:44:19,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 22:44:19,283 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:44:19,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:44:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1517109911, now seen corresponding path program 2 times [2023-11-23 22:44:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:44:19,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252566681] [2023-11-23 22:44:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:44:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:44:19,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 22:44:19,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525847671] [2023-11-23 22:44:19,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:44:19,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:44:19,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:44:19,324 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:44:19,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c99bef11-4e0e-4e51-8ba4-b2b7aa014968/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 22:44:19,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:44:19,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:44:19,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:44:19,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:44:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 61 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 22:44:19,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:44:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 61 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 22:44:19,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:44:19,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252566681] [2023-11-23 22:44:19,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 22:44:19,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525847671] [2023-11-23 22:44:19,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525847671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:44:19,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:44:19,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-11-23 22:44:19,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703461240] [2023-11-23 22:44:19,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 22:44:19,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 22:44:19,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:44:19,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 22:44:19,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-23 22:44:19,824 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 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)