./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-9.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-9.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme --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 a8e8864fbe413b3462ae8de456d5394de90101cbca5bf1017bcb2949274e710c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:55:07,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:55:07,340 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:55:07,346 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:55:07,346 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:55:07,373 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:55:07,374 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:55:07,375 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:55:07,376 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:55:07,377 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:55:07,377 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:55:07,378 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:55:07,379 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:55:07,380 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:55:07,380 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:55:07,381 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:55:07,381 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:55:07,382 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:55:07,382 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:55:07,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:55:07,383 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:55:07,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:55:07,385 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:55:07,385 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:55:07,386 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:55:07,386 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:55:07,386 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:55:07,387 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:55:07,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:55:07,388 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:55:07,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:55:07,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:07,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:55:07,390 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:55:07,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:55:07,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:55:07,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:55:07,391 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:55:07,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:55:07,391 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:55:07,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:55:07,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:55:07,393 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_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8e8864fbe413b3462ae8de456d5394de90101cbca5bf1017bcb2949274e710c [2023-11-26 11:55:07,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:55:07,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:55:07,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:55:07,758 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:55:07,759 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:55:07,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-9.i [2023-11-26 11:55:10,931 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:55:11,228 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:55:11,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-9.i [2023-11-26 11:55:11,241 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/data/3fa05ab1c/91da0626969b45a69768011c03960f0e/FLAG10aab159a [2023-11-26 11:55:11,261 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/data/3fa05ab1c/91da0626969b45a69768011c03960f0e [2023-11-26 11:55:11,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:55:11,270 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:55:11,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:11,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:55:11,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:55:11,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cee410f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11, skipping insertion in model container [2023-11-26 11:55:11,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,328 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:55:11,500 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_cde6f96d-9878-48e2-8b14-678e9d1b3075/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-9.i[916,929] [2023-11-26 11:55:11,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:11,585 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:55:11,598 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_cde6f96d-9878-48e2-8b14-678e9d1b3075/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_steplocals_file-9.i[916,929] [2023-11-26 11:55:11,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:55:11,647 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:55:11,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11 WrapperNode [2023-11-26 11:55:11,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:55:11,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:11,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:55:11,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:55:11,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,668 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,708 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 172 [2023-11-26 11:55:11,709 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:55:11,709 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:55:11,710 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:55:11,710 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:55:11,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,725 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,741 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:55:11,742 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,742 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,750 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,754 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,762 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:55:11,763 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:55:11,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:55:11,764 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:55:11,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (1/1) ... [2023-11-26 11:55:11,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:55:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:11,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:55:11,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:55:11,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:55:11,844 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:55:11,845 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:55:11,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:55:11,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:55:11,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:55:11,947 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:55:11,950 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:55:12,385 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:55:12,453 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:55:12,453 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:55:12,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:12 BoogieIcfgContainer [2023-11-26 11:55:12,454 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:55:12,457 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:55:12,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:55:12,462 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:55:12,462 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:55:11" (1/3) ... [2023-11-26 11:55:12,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbbc18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:12, skipping insertion in model container [2023-11-26 11:55:12,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:55:11" (2/3) ... [2023-11-26 11:55:12,466 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cbbc18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:55:12, skipping insertion in model container [2023-11-26 11:55:12,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:55:12" (3/3) ... [2023-11-26 11:55:12,468 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_steplocals_file-9.i [2023-11-26 11:55:12,492 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:55:12,492 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:55:12,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:55:12,600 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;@2985c248, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:55:12,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:55:12,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 48 states have internal predecessors, (70), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:55:12,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:55:12,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:12,624 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:12,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:12,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:12,630 INFO L85 PathProgramCache]: Analyzing trace with hash 424136433, now seen corresponding path program 1 times [2023-11-26 11:55:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:12,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015749453] [2023-11-26 11:55:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:12,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:12,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:12,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794198669] [2023-11-26 11:55:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:12,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:12,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:12,826 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:12,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:55:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:13,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:55:13,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:55:13,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:13,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:13,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015749453] [2023-11-26 11:55:13,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:13,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794198669] [2023-11-26 11:55:13,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794198669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:13,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:13,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:13,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41737726] [2023-11-26 11:55:13,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:13,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:13,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:13,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:13,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:13,238 INFO L87 Difference]: Start difference. First operand has 71 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 48 states have internal predecessors, (70), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:13,309 INFO L93 Difference]: Finished difference Result 140 states and 245 transitions. [2023-11-26 11:55:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 138 [2023-11-26 11:55:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:13,327 INFO L225 Difference]: With dead ends: 140 [2023-11-26 11:55:13,328 INFO L226 Difference]: Without dead ends: 70 [2023-11-26 11:55:13,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:13,336 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:13,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 200 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:55:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-26 11:55:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-26 11:55:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-26 11:55:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 108 transitions. [2023-11-26 11:55:13,394 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 108 transitions. Word has length 138 [2023-11-26 11:55:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:13,396 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 108 transitions. [2023-11-26 11:55:13,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 108 transitions. [2023-11-26 11:55:13,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:55:13,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:13,401 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:13,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:13,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:55:13,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:13,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:13,609 INFO L85 PathProgramCache]: Analyzing trace with hash 682301871, now seen corresponding path program 1 times [2023-11-26 11:55:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:13,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650535509] [2023-11-26 11:55:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:13,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:13,693 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:13,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226978620] [2023-11-26 11:55:13,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:13,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:13,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:13,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:13,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:55:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:13,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:55:13,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:55:14,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:14,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:14,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650535509] [2023-11-26 11:55:14,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:14,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226978620] [2023-11-26 11:55:14,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226978620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:14,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303476627] [2023-11-26 11:55:14,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:14,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:55:14,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:55:14,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:55:14,406 INFO L87 Difference]: Start difference. First operand 70 states and 108 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:15,155 INFO L93 Difference]: Finished difference Result 260 states and 396 transitions. [2023-11-26 11:55:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:55:15,160 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 138 [2023-11-26 11:55:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:15,164 INFO L225 Difference]: With dead ends: 260 [2023-11-26 11:55:15,164 INFO L226 Difference]: Without dead ends: 191 [2023-11-26 11:55:15,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:55:15,173 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 214 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:15,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 517 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:55:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-26 11:55:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 133. [2023-11-26 11:55:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 107 states have (on average 1.485981308411215) internal successors, (159), 108 states have internal predecessors, (159), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-26 11:55:15,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 205 transitions. [2023-11-26 11:55:15,233 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 205 transitions. Word has length 138 [2023-11-26 11:55:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:15,234 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 205 transitions. [2023-11-26 11:55:15,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 205 transitions. [2023-11-26 11:55:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:55:15,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:15,238 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:15,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:15,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:15,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:15,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash 95495857, now seen corresponding path program 1 times [2023-11-26 11:55:15,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:15,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601422616] [2023-11-26 11:55:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:15,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:15,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681747856] [2023-11-26 11:55:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:15,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:15,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:15,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:15,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:55:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:15,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:55:15,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:55:16,205 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:16,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:16,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601422616] [2023-11-26 11:55:16,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:16,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681747856] [2023-11-26 11:55:16,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681747856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:16,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:16,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:55:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489176821] [2023-11-26 11:55:16,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:55:16,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:55:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:55:16,209 INFO L87 Difference]: Start difference. First operand 133 states and 205 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:17,163 INFO L93 Difference]: Finished difference Result 350 states and 526 transitions. [2023-11-26 11:55:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-26 11:55:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 138 [2023-11-26 11:55:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:17,169 INFO L225 Difference]: With dead ends: 350 [2023-11-26 11:55:17,170 INFO L226 Difference]: Without dead ends: 218 [2023-11-26 11:55:17,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:55:17,178 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 183 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:17,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 594 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:55:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-26 11:55:17,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 133. [2023-11-26 11:55:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 107 states have (on average 1.485981308411215) internal successors, (159), 108 states have internal predecessors, (159), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-26 11:55:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 205 transitions. [2023-11-26 11:55:17,220 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 205 transitions. Word has length 138 [2023-11-26 11:55:17,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:17,221 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 205 transitions. [2023-11-26 11:55:17,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:17,222 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 205 transitions. [2023-11-26 11:55:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:55:17,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:17,225 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:17,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:17,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:17,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:17,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:17,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1693419121, now seen corresponding path program 1 times [2023-11-26 11:55:17,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:17,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849518333] [2023-11-26 11:55:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:17,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:17,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:17,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516574473] [2023-11-26 11:55:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:17,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:17,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:17,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:17,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:55:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:17,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:55:17,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:55:17,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:17,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:17,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849518333] [2023-11-26 11:55:17,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:17,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516574473] [2023-11-26 11:55:17,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516574473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:17,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:17,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:55:17,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842411892] [2023-11-26 11:55:17,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:17,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:17,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:17,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:17,807 INFO L87 Difference]: Start difference. First operand 133 states and 205 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:18,153 INFO L93 Difference]: Finished difference Result 357 states and 546 transitions. [2023-11-26 11:55:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:55:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 138 [2023-11-26 11:55:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:18,157 INFO L225 Difference]: With dead ends: 357 [2023-11-26 11:55:18,157 INFO L226 Difference]: Without dead ends: 225 [2023-11-26 11:55:18,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:55:18,159 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 120 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:18,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 542 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:55:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-26 11:55:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 197. [2023-11-26 11:55:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 166 states have (on average 1.5240963855421688) internal successors, (253), 168 states have internal predecessors, (253), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-26 11:55:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 307 transitions. [2023-11-26 11:55:18,183 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 307 transitions. Word has length 138 [2023-11-26 11:55:18,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:18,183 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 307 transitions. [2023-11-26 11:55:18,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 307 transitions. [2023-11-26 11:55:18,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:55:18,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:18,188 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:18,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:18,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:18,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:18,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:18,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1106613107, now seen corresponding path program 1 times [2023-11-26 11:55:18,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:18,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699012356] [2023-11-26 11:55:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:18,440 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:18,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1394258053] [2023-11-26 11:55:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:18,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:18,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:18,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:18,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:55:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:18,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:55:18,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:55:19,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:19,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699012356] [2023-11-26 11:55:19,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:19,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394258053] [2023-11-26 11:55:19,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394258053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:19,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:19,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:55:19,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566633815] [2023-11-26 11:55:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:19,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:55:19,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:19,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:55:19,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:55:19,134 INFO L87 Difference]: Start difference. First operand 197 states and 307 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:20,076 INFO L93 Difference]: Finished difference Result 423 states and 650 transitions. [2023-11-26 11:55:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:55:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 138 [2023-11-26 11:55:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:20,081 INFO L225 Difference]: With dead ends: 423 [2023-11-26 11:55:20,081 INFO L226 Difference]: Without dead ends: 227 [2023-11-26 11:55:20,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:55:20,083 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 120 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:20,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 522 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:55:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-26 11:55:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 175. [2023-11-26 11:55:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 144 states have (on average 1.4930555555555556) internal successors, (215), 146 states have internal predecessors, (215), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-26 11:55:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 269 transitions. [2023-11-26 11:55:20,113 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 269 transitions. Word has length 138 [2023-11-26 11:55:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:20,115 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 269 transitions. [2023-11-26 11:55:20,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:20,116 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 269 transitions. [2023-11-26 11:55:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:55:20,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:20,120 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:20,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:20,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:20,335 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:20,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash -135346579, now seen corresponding path program 1 times [2023-11-26 11:55:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:20,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454941311] [2023-11-26 11:55:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:20,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:20,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250238955] [2023-11-26 11:55:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:20,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:20,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:20,415 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:20,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:55:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:20,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 11:55:20,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-26 11:55:20,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:55:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:55:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454941311] [2023-11-26 11:55:20,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:55:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250238955] [2023-11-26 11:55:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250238955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:55:20,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:55:20,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:55:20,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30028506] [2023-11-26 11:55:20,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:55:20,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:55:20,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:55:20,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:55:20,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:20,614 INFO L87 Difference]: Start difference. First operand 175 states and 269 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:55:20,695 INFO L93 Difference]: Finished difference Result 360 states and 548 transitions. [2023-11-26 11:55:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:55:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 138 [2023-11-26 11:55:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:55:20,698 INFO L225 Difference]: With dead ends: 360 [2023-11-26 11:55:20,698 INFO L226 Difference]: Without dead ends: 186 [2023-11-26 11:55:20,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:55:20,701 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 32 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:55:20,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 202 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:55:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-26 11:55:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2023-11-26 11:55:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 143 states have (on average 1.4475524475524475) internal successors, (207), 145 states have internal predecessors, (207), 27 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-26 11:55:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 261 transitions. [2023-11-26 11:55:20,724 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 261 transitions. Word has length 138 [2023-11-26 11:55:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:55:20,725 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 261 transitions. [2023-11-26 11:55:20,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-26 11:55:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 261 transitions. [2023-11-26 11:55:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-26 11:55:20,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:55:20,729 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:55:20,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:55:20,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:55:20,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:55:20,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:55:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1639660783, now seen corresponding path program 1 times [2023-11-26 11:55:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:55:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729942284] [2023-11-26 11:55:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:55:20,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:55:20,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767243579] [2023-11-26 11:55:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:55:20,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:55:20,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:55:20,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:55:20,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cde6f96d-9878-48e2-8b14-678e9d1b3075/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:55:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:55:21,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-26 11:55:21,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:55:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 505 proven. 180 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-26 11:55:23,251 INFO L327 TraceCheckSpWp]: Computing backward predicates...