./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya --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 d1c5dbef70eb17e658ce13a53ba3c925aaef4da45bcaa9e57399f7ada50ab560 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:55:13,136 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:55:13,200 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:55:13,204 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:55:13,205 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:55:13,229 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:55:13,230 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:55:13,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:55:13,231 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:55:13,232 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:55:13,232 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:55:13,233 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:55:13,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:55:13,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:55:13,235 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:55:13,235 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:55:13,236 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:55:13,236 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:55:13,237 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:55:13,237 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:55:13,237 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:55:13,238 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:55:13,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:55:13,239 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:55:13,239 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:55:13,240 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:55:13,240 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:55:13,241 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:55:13,241 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:55:13,242 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:55:13,242 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:55:13,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:55:13,243 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:55:13,243 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:55:13,244 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:55:13,244 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:55:13,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:55:13,245 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:55:13,245 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:55:13,246 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:55:13,246 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:55:13,246 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:55:13,247 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_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1c5dbef70eb17e658ce13a53ba3c925aaef4da45bcaa9e57399f7ada50ab560 [2023-11-29 01:55:13,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:55:13,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:55:13,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:55:13,489 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:55:13,490 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:55:13,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2023-11-29 01:55:16,272 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:55:16,441 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:55:16,442 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c [2023-11-29 01:55:16,449 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/data/6427e7af6/2294e54aa03442cc8a72cbe4386a2cb3/FLAG725fa15a8 [2023-11-29 01:55:16,465 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/data/6427e7af6/2294e54aa03442cc8a72cbe4386a2cb3 [2023-11-29 01:55:16,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:55:16,469 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:55:16,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:55:16,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:55:16,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:55:16,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f503088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16, skipping insertion in model container [2023-11-29 01:55:16,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,493 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:55:16,614 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_8f3809f0-534e-4d57-a7b0-ceba907c385e/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c[331,344] [2023-11-29 01:55:16,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:55:16,640 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:55:16,649 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_8f3809f0-534e-4d57-a7b0-ceba907c385e/sv-benchmarks/c/array-programs/partial_mod_count_limited_2.c[331,344] [2023-11-29 01:55:16,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:55:16,672 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:55:16,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16 WrapperNode [2023-11-29 01:55:16,673 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:55:16,674 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:55:16,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:55:16,674 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:55:16,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,686 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,706 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2023-11-29 01:55:16,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:55:16,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:55:16,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:55:16,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:55:16,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,720 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,734 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-11-29 01:55:16,734 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,740 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,746 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:55:16,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:55:16,750 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:55:16,750 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:55:16,751 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (1/1) ... [2023-11-29 01:55:16,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:55:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:16,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:55:16,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:55:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:55:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:55:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 01:55:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 01:55:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 01:55:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 01:55:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:55:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:55:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 01:55:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 01:55:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 01:55:16,884 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:55:16,886 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:55:17,023 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:55:17,054 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:55:17,054 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 01:55:17,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:55:17 BoogieIcfgContainer [2023-11-29 01:55:17,055 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:55:17,058 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:55:17,058 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:55:17,061 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:55:17,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:55:16" (1/3) ... [2023-11-29 01:55:17,062 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6006daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:55:17, skipping insertion in model container [2023-11-29 01:55:17,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:55:16" (2/3) ... [2023-11-29 01:55:17,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6006daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:55:17, skipping insertion in model container [2023-11-29 01:55:17,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:55:17" (3/3) ... [2023-11-29 01:55:17,064 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_2.c [2023-11-29 01:55:17,079 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:55:17,079 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:55:17,120 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:55:17,126 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;@6c3c6223, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:55:17,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:55:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 01:55:17,136 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:17,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:17,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:17,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:17,142 INFO L85 PathProgramCache]: Analyzing trace with hash -245393117, now seen corresponding path program 1 times [2023-11-29 01:55:17,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:17,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72841912] [2023-11-29 01:55:17,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:17,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:17,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:17,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106489966] [2023-11-29 01:55:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:17,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:17,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:17,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:55:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:17,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 01:55:17,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:17,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72841912] [2023-11-29 01:55:17,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106489966] [2023-11-29 01:55:17,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106489966] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:17,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:17,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:55:17,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430480701] [2023-11-29 01:55:17,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:17,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:55:17,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:55:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:55:17,359 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-29 01:55:17,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:17,382 INFO L93 Difference]: Finished difference Result 34 states and 49 transitions. [2023-11-29 01:55:17,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:55:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2023-11-29 01:55:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:17,392 INFO L225 Difference]: With dead ends: 34 [2023-11-29 01:55:17,392 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 01:55:17,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:55:17,399 INFO L413 NwaCegarLoop]: 19 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, 19 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 [2023-11-29 01:55:17,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 01:55:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-29 01:55:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2023-11-29 01:55:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-29 01:55:17,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2023-11-29 01:55:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:17,431 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-29 01:55:17,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-11-29 01:55:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-29 01:55:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 01:55:17,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:17,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:17,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:55:17,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 01:55:17,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:17,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:17,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1639468179, now seen corresponding path program 1 times [2023-11-29 01:55:17,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:17,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214685046] [2023-11-29 01:55:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:17,644 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:17,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852513412] [2023-11-29 01:55:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:17,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:17,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:17,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:17,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:55:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:17,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:55:17,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:17,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:17,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214685046] [2023-11-29 01:55:17,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:17,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852513412] [2023-11-29 01:55:17,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852513412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:17,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:17,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:55:17,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276510917] [2023-11-29 01:55:17,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:17,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:55:17,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:17,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:55:17,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:55:17,755 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-29 01:55:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:17,801 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2023-11-29 01:55:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:55:17,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-29 01:55:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:17,802 INFO L225 Difference]: With dead ends: 41 [2023-11-29 01:55:17,803 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 01:55:17,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:55:17,805 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:17,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 01:55:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2023-11-29 01:55:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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) [2023-11-29 01:55:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-29 01:55:17,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2023-11-29 01:55:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:17,811 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-29 01:55:17,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-29 01:55:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-29 01:55:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 01:55:17,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:17,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:17,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:55:18,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:18,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:18,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:18,017 INFO L85 PathProgramCache]: Analyzing trace with hash 563464204, now seen corresponding path program 1 times [2023-11-29 01:55:18,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:18,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584678555] [2023-11-29 01:55:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:18,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:18,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544019362] [2023-11-29 01:55:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:18,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:18,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:18,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:18,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:55:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:18,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:55:18,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:18,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:18,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584678555] [2023-11-29 01:55:18,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544019362] [2023-11-29 01:55:18,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544019362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:18,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:55:18,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2023-11-29 01:55:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272825685] [2023-11-29 01:55:18,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:18,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:55:18,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:55:18,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:55:18,202 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-29 01:55:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:18,312 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2023-11-29 01:55:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:55:18,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 15 [2023-11-29 01:55:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:18,314 INFO L225 Difference]: With dead ends: 67 [2023-11-29 01:55:18,314 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 01:55:18,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:55:18,316 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:18,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 33 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:55:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 01:55:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 32. [2023-11-29 01:55:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-11-29 01:55:18,324 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 15 [2023-11-29 01:55:18,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:18,325 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-11-29 01:55:18,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-11-29 01:55:18,325 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-11-29 01:55:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 01:55:18,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:18,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:18,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:55:18,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:18,527 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:18,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1188975981, now seen corresponding path program 1 times [2023-11-29 01:55:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:18,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597185980] [2023-11-29 01:55:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:18,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:18,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952684048] [2023-11-29 01:55:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:18,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:18,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:18,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:55:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:18,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:55:18,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:18,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:18,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:18,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597185980] [2023-11-29 01:55:18,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:18,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952684048] [2023-11-29 01:55:18,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952684048] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:18,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:55:18,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 01:55:18,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089721765] [2023-11-29 01:55:18,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:18,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 01:55:18,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 01:55:18,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:55:18,872 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 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) [2023-11-29 01:55:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:19,136 INFO L93 Difference]: Finished difference Result 143 states and 183 transitions. [2023-11-29 01:55:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:55:19,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 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 30 [2023-11-29 01:55:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:19,138 INFO L225 Difference]: With dead ends: 143 [2023-11-29 01:55:19,139 INFO L226 Difference]: Without dead ends: 126 [2023-11-29 01:55:19,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:55:19,141 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 387 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:19,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 75 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:55:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-29 01:55:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 62. [2023-11-29 01:55:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 61 states have internal predecessors, (79), 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) [2023-11-29 01:55:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-11-29 01:55:19,168 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 30 [2023-11-29 01:55:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:19,168 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-11-29 01:55:19,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 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) [2023-11-29 01:55:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-11-29 01:55:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 01:55:19,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:19,171 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:19,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:55:19,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:19,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:19,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:19,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2133521487, now seen corresponding path program 2 times [2023-11-29 01:55:19,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:19,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995370725] [2023-11-29 01:55:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:19,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:19,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:19,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586365502] [2023-11-29 01:55:19,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:55:19,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:19,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:19,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:19,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:55:19,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:55:19,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:55:19,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:55:19,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-29 01:55:19,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:19,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:19,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995370725] [2023-11-29 01:55:19,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:19,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586365502] [2023-11-29 01:55:19,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586365502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:19,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:19,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:55:19,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322784849] [2023-11-29 01:55:19,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:19,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:55:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:55:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:55:19,998 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-29 01:55:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:20,078 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2023-11-29 01:55:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:55:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 60 [2023-11-29 01:55:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:20,080 INFO L225 Difference]: With dead ends: 69 [2023-11-29 01:55:20,080 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 01:55:20,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:55:20,081 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:20,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:20,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 01:55:20,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-29 01:55:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 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) [2023-11-29 01:55:20,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2023-11-29 01:55:20,093 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 60 [2023-11-29 01:55:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:20,093 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2023-11-29 01:55:20,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-29 01:55:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2023-11-29 01:55:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-29 01:55:20,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:20,096 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:20,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:55:20,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:20,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:20,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:20,301 INFO L85 PathProgramCache]: Analyzing trace with hash -2133581069, now seen corresponding path program 1 times [2023-11-29 01:55:20,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:20,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968133470] [2023-11-29 01:55:20,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:20,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:20,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:20,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799904880] [2023-11-29 01:55:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:20,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:20,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:20,321 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:20,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:55:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:20,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:55:20,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:20,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 01:55:20,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:20,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968133470] [2023-11-29 01:55:20,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:20,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799904880] [2023-11-29 01:55:20,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799904880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:20,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:55:20,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-29 01:55:20,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592037303] [2023-11-29 01:55:20,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:20,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 01:55:20,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:20,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 01:55:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:55:20,993 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 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) [2023-11-29 01:55:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:21,670 INFO L93 Difference]: Finished difference Result 416 states and 523 transitions. [2023-11-29 01:55:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 01:55:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 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 60 [2023-11-29 01:55:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:21,674 INFO L225 Difference]: With dead ends: 416 [2023-11-29 01:55:21,675 INFO L226 Difference]: Without dead ends: 379 [2023-11-29 01:55:21,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 01:55:21,677 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 785 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:21,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 159 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:55:21,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-29 01:55:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 127. [2023-11-29 01:55:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.2936507936507937) internal successors, (163), 126 states have internal predecessors, (163), 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) [2023-11-29 01:55:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2023-11-29 01:55:21,698 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 60 [2023-11-29 01:55:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:21,698 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2023-11-29 01:55:21,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 25 states have internal predecessors, (114), 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) [2023-11-29 01:55:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2023-11-29 01:55:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 01:55:21,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:21,701 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:21,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:55:21,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:55:21,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:21,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:21,902 INFO L85 PathProgramCache]: Analyzing trace with hash 85478515, now seen corresponding path program 2 times [2023-11-29 01:55:21,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:21,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49671124] [2023-11-29 01:55:21,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:21,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:21,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:21,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983286269] [2023-11-29 01:55:21,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:55:21,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:21,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:21,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:21,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:55:22,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 01:55:22,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:55:22,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 01:55:22,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2023-11-29 01:55:22,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:55:22,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49671124] [2023-11-29 01:55:22,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:22,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983286269] [2023-11-29 01:55:22,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983286269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:55:22,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:55:22,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:55:22,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718606593] [2023-11-29 01:55:22,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:55:22,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 01:55:22,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:22,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 01:55:22,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:55:22,749 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-29 01:55:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:22,834 INFO L93 Difference]: Finished difference Result 134 states and 171 transitions. [2023-11-29 01:55:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:55:22,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 120 [2023-11-29 01:55:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:22,836 INFO L225 Difference]: With dead ends: 134 [2023-11-29 01:55:22,836 INFO L226 Difference]: Without dead ends: 132 [2023-11-29 01:55:22,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:55:22,837 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:22,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:55:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-29 01:55:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-29 01:55:22,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2900763358778626) internal successors, (169), 131 states have internal predecessors, (169), 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) [2023-11-29 01:55:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 169 transitions. [2023-11-29 01:55:22,852 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 169 transitions. Word has length 120 [2023-11-29 01:55:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:22,852 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 169 transitions. [2023-11-29 01:55:22,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2023-11-29 01:55:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 169 transitions. [2023-11-29 01:55:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 01:55:22,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:22,855 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:22,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:55:23,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 01:55:23,060 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:23,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash 136217841, now seen corresponding path program 1 times [2023-11-29 01:55:23,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:23,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830705092] [2023-11-29 01:55:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:23,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:23,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709188563] [2023-11-29 01:55:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:23,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:23,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:23,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:23,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:55:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:23,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:55:23,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:55:23,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:55:24,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:24,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830705092] [2023-11-29 01:55:24,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:24,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709188563] [2023-11-29 01:55:24,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709188563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:24,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:55:24,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2023-11-29 01:55:24,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503495235] [2023-11-29 01:55:24,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:24,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 01:55:24,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:24,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 01:55:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:55:24,590 INFO L87 Difference]: Start difference. First operand 132 states and 169 transitions. Second operand has 50 states, 50 states have (on average 4.72) internal successors, (236), 49 states have internal predecessors, (236), 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) [2023-11-29 01:55:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:26,171 INFO L93 Difference]: Finished difference Result 1081 states and 1347 transitions. [2023-11-29 01:55:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 01:55:26,172 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.72) internal successors, (236), 49 states have internal predecessors, (236), 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 125 [2023-11-29 01:55:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:26,176 INFO L225 Difference]: With dead ends: 1081 [2023-11-29 01:55:26,176 INFO L226 Difference]: Without dead ends: 1009 [2023-11-29 01:55:26,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 01:55:26,180 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2071 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2071 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:26,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2071 Valid, 330 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:55:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2023-11-29 01:55:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 252. [2023-11-29 01:55:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.294820717131474) internal successors, (325), 251 states have internal predecessors, (325), 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) [2023-11-29 01:55:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 325 transitions. [2023-11-29 01:55:26,203 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 325 transitions. Word has length 125 [2023-11-29 01:55:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:26,203 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 325 transitions. [2023-11-29 01:55:26,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.72) internal successors, (236), 49 states have internal predecessors, (236), 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) [2023-11-29 01:55:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 325 transitions. [2023-11-29 01:55:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-29 01:55:26,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:26,209 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:26,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:55:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:26,412 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:26,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1870176753, now seen corresponding path program 2 times [2023-11-29 01:55:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:26,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132631205] [2023-11-29 01:55:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:26,462 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:26,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151475808] [2023-11-29 01:55:26,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:55:26,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:26,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:26,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:26,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:55:26,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:55:26,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:55:26,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 01:55:26,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:55:28,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5225 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 01:55:30,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:30,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132631205] [2023-11-29 01:55:30,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:30,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151475808] [2023-11-29 01:55:30,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151475808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:30,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:55:30,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2023-11-29 01:55:30,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530849392] [2023-11-29 01:55:30,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:30,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 01:55:30,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:30,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 01:55:30,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 01:55:30,372 INFO L87 Difference]: Start difference. First operand 252 states and 325 transitions. Second operand has 98 states, 98 states have (on average 4.857142857142857) internal successors, (476), 97 states have internal predecessors, (476), 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) [2023-11-29 01:55:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:37,199 INFO L93 Difference]: Finished difference Result 2197 states and 2739 transitions. [2023-11-29 01:55:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 01:55:37,199 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.857142857142857) internal successors, (476), 97 states have internal predecessors, (476), 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 245 [2023-11-29 01:55:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:37,207 INFO L225 Difference]: With dead ends: 2197 [2023-11-29 01:55:37,207 INFO L226 Difference]: Without dead ends: 2065 [2023-11-29 01:55:37,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2023-11-29 01:55:37,213 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4196 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4196 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:37,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4196 Valid, 666 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:55:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2023-11-29 01:55:37,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 492. [2023-11-29 01:55:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.2973523421588595) internal successors, (637), 491 states have internal predecessors, (637), 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) [2023-11-29 01:55:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 637 transitions. [2023-11-29 01:55:37,243 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 637 transitions. Word has length 245 [2023-11-29 01:55:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:37,244 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 637 transitions. [2023-11-29 01:55:37,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.857142857142857) internal successors, (476), 97 states have internal predecessors, (476), 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) [2023-11-29 01:55:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 637 transitions. [2023-11-29 01:55:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-11-29 01:55:37,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:37,254 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:37,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:55:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:37,454 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:37,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1325982735, now seen corresponding path program 3 times [2023-11-29 01:55:37,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:37,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086858932] [2023-11-29 01:55:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:37,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:37,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:37,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740130550] [2023-11-29 01:55:37,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 01:55:37,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:37,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:37,523 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:37,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:55:37,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 01:55:37,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:55:37,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:55:37,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2023-11-29 01:55:39,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21953 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2023-11-29 01:55:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:41,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086858932] [2023-11-29 01:55:41,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:41,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740130550] [2023-11-29 01:55:41,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740130550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:41,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:55:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-29 01:55:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098441921] [2023-11-29 01:55:41,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:41,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:55:41,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:55:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:55:41,607 INFO L87 Difference]: Start difference. First operand 492 states and 637 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 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) [2023-11-29 01:55:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:43,164 INFO L93 Difference]: Finished difference Result 514 states and 666 transitions. [2023-11-29 01:55:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:55:43,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 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 485 [2023-11-29 01:55:43,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:43,169 INFO L225 Difference]: With dead ends: 514 [2023-11-29 01:55:43,170 INFO L226 Difference]: Without dead ends: 512 [2023-11-29 01:55:43,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:55:43,171 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:43,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 68 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:55:43,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-11-29 01:55:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2023-11-29 01:55:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.2935420743639923) internal successors, (661), 511 states have internal predecessors, (661), 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) [2023-11-29 01:55:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 661 transitions. [2023-11-29 01:55:43,233 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 661 transitions. Word has length 485 [2023-11-29 01:55:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:43,234 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 661 transitions. [2023-11-29 01:55:43,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 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) [2023-11-29 01:55:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 661 transitions. [2023-11-29 01:55:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 01:55:43,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:43,245 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:43,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:55:43,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:43,448 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:43,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:43,448 INFO L85 PathProgramCache]: Analyzing trace with hash -744079759, now seen corresponding path program 4 times [2023-11-29 01:55:43,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:43,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980588188] [2023-11-29 01:55:43,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:43,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:43,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:43,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144444111] [2023-11-29 01:55:43,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 01:55:43,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:43,517 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:43,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:55:43,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 01:55:43,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:55:43,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 1337 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:55:43,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:43,928 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 13 treesize of output 9 [2023-11-29 01:55:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21184 trivial. 0 not checked. [2023-11-29 01:55:43,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 831 proven. 4 refuted. 0 times theorem prover too weak. 21184 trivial. 0 not checked. [2023-11-29 01:55:44,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:44,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980588188] [2023-11-29 01:55:44,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:44,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144444111] [2023-11-29 01:55:44,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144444111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:44,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:55:44,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 01:55:44,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525483159] [2023-11-29 01:55:44,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:44,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:55:44,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:44,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:55:44,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:55:44,028 INFO L87 Difference]: Start difference. First operand 512 states and 661 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:44,299 INFO L93 Difference]: Finished difference Result 1079 states and 1386 transitions. [2023-11-29 01:55:44,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:55:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 505 [2023-11-29 01:55:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:44,303 INFO L225 Difference]: With dead ends: 1079 [2023-11-29 01:55:44,303 INFO L226 Difference]: Without dead ends: 574 [2023-11-29 01:55:44,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1016 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:55:44,305 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:44,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 96 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:55:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2023-11-29 01:55:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 512. [2023-11-29 01:55:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.2857142857142858) internal successors, (657), 511 states have internal predecessors, (657), 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) [2023-11-29 01:55:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 657 transitions. [2023-11-29 01:55:44,365 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 657 transitions. Word has length 505 [2023-11-29 01:55:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:55:44,366 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 657 transitions. [2023-11-29 01:55:44,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 01:55:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 657 transitions. [2023-11-29 01:55:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 01:55:44,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:55:44,370 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 90, 47, 47, 6, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:55:44,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:55:44,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:44,570 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:55:44,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:55:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1045013519, now seen corresponding path program 1 times [2023-11-29 01:55:44,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:55:44,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447553725] [2023-11-29 01:55:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:44,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:55:44,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:55:44,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575746478] [2023-11-29 01:55:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:55:44,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:55:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:55:44,637 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:55:44,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:55:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:55:45,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 01:55:45,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:55:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 01:55:49,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:55:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 01:55:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:55:56,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447553725] [2023-11-29 01:55:56,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:55:56,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575746478] [2023-11-29 01:55:56,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575746478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:55:56,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:55:56,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2023-11-29 01:55:56,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122281826] [2023-11-29 01:55:56,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:55:56,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-11-29 01:55:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:55:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-11-29 01:55:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2023-11-29 01:55:56,452 INFO L87 Difference]: Start difference. First operand 512 states and 657 transitions. Second operand has 194 states, 194 states have (on average 4.927835051546392) internal successors, (956), 193 states have internal predecessors, (956), 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) [2023-11-29 01:56:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:56:48,707 INFO L93 Difference]: Finished difference Result 8167 states and 10003 transitions. [2023-11-29 01:56:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-11-29 01:56:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.927835051546392) internal successors, (956), 193 states have internal predecessors, (956), 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 505 [2023-11-29 01:56:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:56:48,746 INFO L225 Difference]: With dead ends: 8167 [2023-11-29 01:56:48,746 INFO L226 Difference]: Without dead ends: 7895 [2023-11-29 01:56:48,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1103 GetRequests, 816 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2023-11-29 01:56:48,756 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11175 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 1049 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11175 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:56:48,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11175 Valid, 1330 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1049 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-11-29 01:56:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7895 states. [2023-11-29 01:56:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7895 to 992. [2023-11-29 01:56:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 1.2926337033299697) internal successors, (1281), 991 states have internal predecessors, (1281), 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) [2023-11-29 01:56:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1281 transitions. [2023-11-29 01:56:48,935 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1281 transitions. Word has length 505 [2023-11-29 01:56:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:48,935 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1281 transitions. [2023-11-29 01:56:48,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.927835051546392) internal successors, (956), 193 states have internal predecessors, (956), 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) [2023-11-29 01:56:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1281 transitions. [2023-11-29 01:56:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 986 [2023-11-29 01:56:48,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:48,947 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 186, 95, 95, 6, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 01:56:48,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:56:49,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:49,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:49,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:49,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1565544433, now seen corresponding path program 2 times [2023-11-29 01:56:49,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:49,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755240027] [2023-11-29 01:56:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:49,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:49,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:49,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42861436] [2023-11-29 01:56:49,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 01:56:49,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:49,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:49,299 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:49,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:56:50,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 01:56:50,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:56:50,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 3260 conjuncts, 193 conjunts are in the unsatisfiable core [2023-11-29 01:56:50,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:57:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 90035 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 01:57:04,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:57:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 90035 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-29 01:57:31,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:57:31,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755240027] [2023-11-29 01:57:31,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:57:31,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42861436] [2023-11-29 01:57:31,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42861436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:57:31,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:57:31,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 385 [2023-11-29 01:57:31,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544488579] [2023-11-29 01:57:31,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:57:31,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-11-29 01:57:31,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:57:31,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-11-29 01:57:31,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73923, Invalid=74687, Unknown=0, NotChecked=0, Total=148610 [2023-11-29 01:57:31,739 INFO L87 Difference]: Start difference. First operand 992 states and 1281 transitions. Second operand has 386 states, 386 states have (on average 4.963730569948186) internal successors, (1916), 385 states have internal predecessors, (1916), 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) [2023-11-29 02:06:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:42,625 INFO L93 Difference]: Finished difference Result 16471 states and 20179 transitions. [2023-11-29 02:06:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2023-11-29 02:06:42,627 INFO L78 Accepts]: Start accepts. Automaton has has 386 states, 386 states have (on average 4.963730569948186) internal successors, (1916), 385 states have internal predecessors, (1916), 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 985 [2023-11-29 02:06:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:42,680 INFO L225 Difference]: With dead ends: 16471 [2023-11-29 02:06:42,681 INFO L226 Difference]: Without dead ends: 15959 [2023-11-29 02:06:42,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2159 GetRequests, 1584 SyntacticMatches, 0 SemanticMatches, 575 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73153 ImplicationChecksByTransitivity, 73.8s TimeCoverageRelationStatistics Valid=147649, Invalid=184703, Unknown=0, NotChecked=0, Total=332352 [2023-11-29 02:06:42,709 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19259 mSDsluCounter, 2665 mSDsCounter, 0 mSdLazyCounter, 2888 mSolverCounterSat, 2004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19259 SdHoareTripleChecker+Valid, 2675 SdHoareTripleChecker+Invalid, 4892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2004 IncrementalHoareTripleChecker+Valid, 2888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:42,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19259 Valid, 2675 Invalid, 4892 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2004 Valid, 2888 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2023-11-29 02:06:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15959 states. [2023-11-29 02:06:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15959 to 1952. [2023-11-29 02:06:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1952 states, 1951 states have (on average 1.2962583290620195) internal successors, (2529), 1951 states have internal predecessors, (2529), 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) [2023-11-29 02:06:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1952 states to 1952 states and 2529 transitions. [2023-11-29 02:06:43,006 INFO L78 Accepts]: Start accepts. Automaton has 1952 states and 2529 transitions. Word has length 985 [2023-11-29 02:06:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:43,007 INFO L495 AbstractCegarLoop]: Abstraction has 1952 states and 2529 transitions. [2023-11-29 02:06:43,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 386 states, 386 states have (on average 4.963730569948186) internal successors, (1916), 385 states have internal predecessors, (1916), 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) [2023-11-29 02:06:43,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1952 states and 2529 transitions. [2023-11-29 02:06:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1946 [2023-11-29 02:06:43,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:43,042 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 382, 378, 191, 191, 6, 6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:43,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:06:43,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:43,242 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:06:43,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2128070671, now seen corresponding path program 3 times [2023-11-29 02:06:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:43,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416414328] [2023-11-29 02:06:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:43,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:06:43,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790637861] [2023-11-29 02:06:43,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:06:43,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:43,448 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:43,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:06:44,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:06:44,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:44,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:06:44,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:48,671 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 17 treesize of output 13 [2023-11-29 02:06:48,689 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 25 treesize of output 9 [2023-11-29 02:06:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 364307 backedges. 381 proven. 1525 refuted. 0 times theorem prover too weak. 362401 trivial. 0 not checked. [2023-11-29 02:06:48,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 364307 backedges. 0 proven. 1906 refuted. 0 times theorem prover too weak. 362401 trivial. 0 not checked. [2023-11-29 02:07:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416414328] [2023-11-29 02:07:42,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:07:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790637861] [2023-11-29 02:07:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790637861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:42,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:07:42,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-29 02:07:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19169202] [2023-11-29 02:07:42,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:07:42,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:07:42,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:07:42,448 INFO L87 Difference]: Start difference. First operand 1952 states and 2529 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:43,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:43,070 INFO L93 Difference]: Finished difference Result 7323 states and 9620 transitions. [2023-11-29 02:07:43,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:07:43,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1945 [2023-11-29 02:07:43,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:43,089 INFO L225 Difference]: With dead ends: 7323 [2023-11-29 02:07:43,089 INFO L226 Difference]: Without dead ends: 6338 [2023-11-29 02:07:43,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3902 GetRequests, 3876 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:07:43,092 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 125 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:43,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 41 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:07:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6338 states. [2023-11-29 02:07:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6338 to 4980. [2023-11-29 02:07:43,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4979 states have (on average 1.306286402892147) internal successors, (6504), 4979 states have internal predecessors, (6504), 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) [2023-11-29 02:07:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 6504 transitions. [2023-11-29 02:07:43,406 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 6504 transitions. Word has length 1945 [2023-11-29 02:07:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:43,407 INFO L495 AbstractCegarLoop]: Abstraction has 4980 states and 6504 transitions. [2023-11-29 02:07:43,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:43,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 6504 transitions. [2023-11-29 02:07:43,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1946 [2023-11-29 02:07:43,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:43,431 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 382, 282, 191, 191, 100, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:43,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 02:07:43,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:43,632 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:07:43,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:43,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1817399277, now seen corresponding path program 4 times [2023-11-29 02:07:43,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:43,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157701137] [2023-11-29 02:07:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:43,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:43,867 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:07:43,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913772961] [2023-11-29 02:07:43,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:07:43,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:43,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:43,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:43,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:07:45,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:07:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:07:45,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 4925 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 02:07:45,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:45,528 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 17 treesize of output 13 [2023-11-29 02:07:45,547 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 25 treesize of output 9 [2023-11-29 02:07:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 364307 backedges. 9099 proven. 4 refuted. 0 times theorem prover too weak. 355204 trivial. 0 not checked. [2023-11-29 02:07:45,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 364307 backedges. 9091 proven. 12 refuted. 0 times theorem prover too weak. 355204 trivial. 0 not checked. [2023-11-29 02:07:45,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:45,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157701137] [2023-11-29 02:07:45,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:07:45,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913772961] [2023-11-29 02:07:45,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913772961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:45,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:07:45,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-29 02:07:45,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935558063] [2023-11-29 02:07:45,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:45,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:07:45,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:45,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:07:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:07:45,708 INFO L87 Difference]: Start difference. First operand 4980 states and 6504 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 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) [2023-11-29 02:07:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:46,343 INFO L93 Difference]: Finished difference Result 8870 states and 11551 transitions. [2023-11-29 02:07:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:07:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 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 1945 [2023-11-29 02:07:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:46,349 INFO L225 Difference]: With dead ends: 8870 [2023-11-29 02:07:46,350 INFO L226 Difference]: Without dead ends: 3917 [2023-11-29 02:07:46,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3897 GetRequests, 3874 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:07:46,355 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:46,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 113 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:07:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2023-11-29 02:07:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 2904. [2023-11-29 02:07:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 1.2001377884946607) internal successors, (3484), 2903 states have internal predecessors, (3484), 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) [2023-11-29 02:07:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 3484 transitions. [2023-11-29 02:07:46,611 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 3484 transitions. Word has length 1945 [2023-11-29 02:07:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:46,611 INFO L495 AbstractCegarLoop]: Abstraction has 2904 states and 3484 transitions. [2023-11-29 02:07:46,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 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) [2023-11-29 02:07:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 3484 transitions. [2023-11-29 02:07:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1946 [2023-11-29 02:07:46,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:46,645 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 382, 287, 191, 191, 95, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:46,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:07:46,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:46,846 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:07:46,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:46,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2082188463, now seen corresponding path program 5 times [2023-11-29 02:07:46,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:46,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106157108] [2023-11-29 02:07:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:46,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:47,028 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:07:47,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710910275] [2023-11-29 02:07:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:07:47,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:47,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:47,029 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:47,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f3809f0-534e-4d57-a7b0-ceba907c385e/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process