./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-49.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_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/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_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-49.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/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_d5a0f0af-e3b9-40a8-a795-f9b30691be24/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 ce74000195513c17ffd901e89672c6cb6dc79b874f28b0ecc2438f682d586639 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:46:05,339 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:46:05,463 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:46:05,472 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:46:05,473 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:46:05,512 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:46:05,513 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:46:05,514 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:46:05,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:46:05,520 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:46:05,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:46:05,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:46:05,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:46:05,524 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:46:05,525 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:46:05,525 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:46:05,526 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:46:05,526 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:46:05,527 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:46:05,527 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:46:05,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:46:05,530 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:46:05,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:46:05,531 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:46:05,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:46:05,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:46:05,532 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:46:05,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:46:05,534 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:46:05,534 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:46:05,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:46:05,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:05,537 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:46:05,537 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:46:05,537 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:46:05,538 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:46:05,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:46:05,538 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:46:05,538 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:46:05,539 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:46:05,539 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:46:05,539 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:46:05,540 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_d5a0f0af-e3b9-40a8-a795-f9b30691be24/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce74000195513c17ffd901e89672c6cb6dc79b874f28b0ecc2438f682d586639 [2023-11-26 11:46:05,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:46:05,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:46:05,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:46:05,908 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:46:05,909 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:46:05,910 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-49.i [2023-11-26 11:46:09,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:46:09,294 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:46:09,294 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-49.i [2023-11-26 11:46:09,312 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/data/d132182ea/da6b669ddd0a4aa291641e748f6ce2d4/FLAG9b8f2c847 [2023-11-26 11:46:09,329 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/data/d132182ea/da6b669ddd0a4aa291641e748f6ce2d4 [2023-11-26 11:46:09,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:46:09,333 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:46:09,335 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:09,335 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:46:09,342 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:46:09,343 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:09" (1/1) ... [2023-11-26 11:46:09,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549125a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:09, skipping insertion in model container [2023-11-26 11:46:09,344 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:46:09" (1/1) ... [2023-11-26 11:46:09,401 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:46:09,560 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_d5a0f0af-e3b9-40a8-a795-f9b30691be24/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-49.i[916,929] [2023-11-26 11:46:09,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:09,814 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:46:09,832 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_d5a0f0af-e3b9-40a8-a795-f9b30691be24/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-49.i[916,929] [2023-11-26 11:46:09,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:46:10,009 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:46:10,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10 WrapperNode [2023-11-26 11:46:10,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:46:10,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:10,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:46:10,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:46:10,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,059 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,189 INFO L138 Inliner]: procedures = 26, calls = 74, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 445 [2023-11-26 11:46:10,190 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:46:10,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:46:10,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:46:10,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:46:10,203 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,203 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,219 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,304 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 11:46:10,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,351 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,375 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:46:10,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:46:10,421 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:46:10,421 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:46:10,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (1/1) ... [2023-11-26 11:46:10,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:46:10,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:10,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:46:10,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:46:10,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:46:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:46:10,513 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:46:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:46:10,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:46:10,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:46:10,693 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:46:10,695 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:46:11,630 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:46:11,710 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:46:11,710 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:46:11,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:11 BoogieIcfgContainer [2023-11-26 11:46:11,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:46:11,715 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:46:11,715 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:46:11,719 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:46:11,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:46:09" (1/3) ... [2023-11-26 11:46:11,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcfbeed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:11, skipping insertion in model container [2023-11-26 11:46:11,721 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:46:10" (2/3) ... [2023-11-26 11:46:11,723 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dcfbeed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:46:11, skipping insertion in model container [2023-11-26 11:46:11,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:46:11" (3/3) ... [2023-11-26 11:46:11,726 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-49.i [2023-11-26 11:46:11,749 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:46:11,749 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:46:11,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:46:11,834 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;@4a5e85ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:46:11,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:46:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 110 states have internal predecessors, (161), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-26 11:46:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-11-26 11:46:11,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:11,884 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:11,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:11,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:11,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1277362557, now seen corresponding path program 1 times [2023-11-26 11:46:11,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:11,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916414438] [2023-11-26 11:46:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:11,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:12,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:12,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916414438] [2023-11-26 11:46:12,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:46:12,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005198263] [2023-11-26 11:46:12,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:12,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:12,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:12,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:12,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:46:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:12,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:46:12,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 7200 trivial. 0 not checked. [2023-11-26 11:46:12,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:46:12,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005198263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:12,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:46:12,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145120134] [2023-11-26 11:46:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:12,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:46:12,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:13,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:46:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:46:13,006 INFO L87 Difference]: Start difference. First operand has 173 states, 109 states have (on average 1.4770642201834863) internal successors, (161), 110 states have internal predecessors, (161), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Second operand has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-26 11:46:13,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:13,096 INFO L93 Difference]: Finished difference Result 343 states and 625 transitions. [2023-11-26 11:46:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:46:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) Word has length 388 [2023-11-26 11:46:13,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:13,123 INFO L225 Difference]: With dead ends: 343 [2023-11-26 11:46:13,123 INFO L226 Difference]: Without dead ends: 171 [2023-11-26 11:46:13,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:46:13,135 INFO L413 NwaCegarLoop]: 275 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, 275 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 [2023-11-26 11:46:13,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 275 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:46:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-26 11:46:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-11-26 11:46:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 108 states have internal predecessors, (156), 61 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2023-11-26 11:46:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 278 transitions. [2023-11-26 11:46:13,224 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 278 transitions. Word has length 388 [2023-11-26 11:46:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:13,225 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 278 transitions. [2023-11-26 11:46:13,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-26 11:46:13,226 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 278 transitions. [2023-11-26 11:46:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2023-11-26 11:46:13,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:13,241 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:13,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:13,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:46:13,449 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:13,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash 124201077, now seen corresponding path program 1 times [2023-11-26 11:46:13,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:13,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60146539] [2023-11-26 11:46:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:13,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:13,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602776986] [2023-11-26 11:46:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:13,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:13,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:13,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:13,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:46:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:14,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:46:14,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-26 11:46:14,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:46:14,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:14,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60146539] [2023-11-26 11:46:14,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:14,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602776986] [2023-11-26 11:46:14,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602776986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:14,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:14,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:46:14,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522890133] [2023-11-26 11:46:14,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:14,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:46:14,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:46:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:46:14,230 INFO L87 Difference]: Start difference. First operand 171 states and 278 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-26 11:46:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:14,445 INFO L93 Difference]: Finished difference Result 510 states and 830 transitions. [2023-11-26 11:46:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:46:14,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 388 [2023-11-26 11:46:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:14,456 INFO L225 Difference]: With dead ends: 510 [2023-11-26 11:46:14,456 INFO L226 Difference]: Without dead ends: 340 [2023-11-26 11:46:14,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 386 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 11:46:14,473 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 266 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:14,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 687 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:46:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-11-26 11:46:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 338. [2023-11-26 11:46:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 213 states have (on average 1.4131455399061033) internal successors, (301), 213 states have internal predecessors, (301), 122 states have call successors, (122), 2 states have call predecessors, (122), 2 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-26 11:46:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 545 transitions. [2023-11-26 11:46:14,572 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 545 transitions. Word has length 388 [2023-11-26 11:46:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:14,574 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 545 transitions. [2023-11-26 11:46:14,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-26 11:46:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 545 transitions. [2023-11-26 11:46:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2023-11-26 11:46:14,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:14,589 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:14,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:14,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:14,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:14,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2042020100, now seen corresponding path program 1 times [2023-11-26 11:46:14,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:14,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691153109] [2023-11-26 11:46:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:14,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:14,908 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:14,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374454229] [2023-11-26 11:46:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:14,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:14,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:14,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:14,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:46:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:15,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:46:15,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3714 proven. 93 refuted. 0 times theorem prover too weak. 3513 trivial. 0 not checked. [2023-11-26 11:46:15,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 87 proven. 93 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-26 11:46:16,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:16,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691153109] [2023-11-26 11:46:16,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:16,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374454229] [2023-11-26 11:46:16,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374454229] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:16,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:46:16,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:46:16,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145542506] [2023-11-26 11:46:16,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:16,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:46:16,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:16,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:46:16,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:46:16,430 INFO L87 Difference]: Start difference. First operand 338 states and 545 transitions. Second operand has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2023-11-26 11:46:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:17,184 INFO L93 Difference]: Finished difference Result 687 states and 1099 transitions. [2023-11-26 11:46:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:46:17,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) Word has length 389 [2023-11-26 11:46:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:17,192 INFO L225 Difference]: With dead ends: 687 [2023-11-26 11:46:17,192 INFO L226 Difference]: Without dead ends: 350 [2023-11-26 11:46:17,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:46:17,196 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 214 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:17,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 461 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:46:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-26 11:46:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 346. [2023-11-26 11:46:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 219 states have (on average 1.365296803652968) internal successors, (299), 219 states have internal predecessors, (299), 122 states have call successors, (122), 4 states have call predecessors, (122), 4 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-26 11:46:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 543 transitions. [2023-11-26 11:46:17,287 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 543 transitions. Word has length 389 [2023-11-26 11:46:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:17,289 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 543 transitions. [2023-11-26 11:46:17,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (92), 2 states have call predecessors, (92), 4 states have return successors, (93), 3 states have call predecessors, (93), 3 states have call successors, (93) [2023-11-26 11:46:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 543 transitions. [2023-11-26 11:46:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-26 11:46:17,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:17,295 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:17,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:17,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:17,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:17,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:17,505 INFO L85 PathProgramCache]: Analyzing trace with hash -624760072, now seen corresponding path program 1 times [2023-11-26 11:46:17,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:17,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93641606] [2023-11-26 11:46:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:17,613 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:17,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724669766] [2023-11-26 11:46:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:17,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:17,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:17,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:17,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:46:17,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:17,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:46:17,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3214 proven. 123 refuted. 0 times theorem prover too weak. 3983 trivial. 0 not checked. [2023-11-26 11:46:18,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 57 proven. 123 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2023-11-26 11:46:18,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:18,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93641606] [2023-11-26 11:46:18,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:18,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724669766] [2023-11-26 11:46:18,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724669766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:18,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:46:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 11:46:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999835163] [2023-11-26 11:46:18,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:18,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:46:18,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:46:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:46:18,944 INFO L87 Difference]: Start difference. First operand 346 states and 543 transitions. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 3 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2023-11-26 11:46:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:19,501 INFO L93 Difference]: Finished difference Result 703 states and 1095 transitions. [2023-11-26 11:46:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:46:19,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 3 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) Word has length 390 [2023-11-26 11:46:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:19,507 INFO L225 Difference]: With dead ends: 703 [2023-11-26 11:46:19,507 INFO L226 Difference]: Without dead ends: 358 [2023-11-26 11:46:19,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:46:19,510 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 186 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:19,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 462 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 11:46:19,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-26 11:46:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2023-11-26 11:46:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 225 states have (on average 1.3377777777777777) internal successors, (301), 225 states have internal predecessors, (301), 122 states have call successors, (122), 6 states have call predecessors, (122), 6 states have return successors, (122), 122 states have call predecessors, (122), 122 states have call successors, (122) [2023-11-26 11:46:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 545 transitions. [2023-11-26 11:46:19,578 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 545 transitions. Word has length 390 [2023-11-26 11:46:19,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:19,579 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 545 transitions. [2023-11-26 11:46:19,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 states have internal predecessors, (162), 3 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2023-11-26 11:46:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 545 transitions. [2023-11-26 11:46:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-26 11:46:19,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:19,584 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:19,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:19,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:19,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:19,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash -2016780989, now seen corresponding path program 1 times [2023-11-26 11:46:19,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:19,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174126828] [2023-11-26 11:46:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:19,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:19,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:19,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940357986] [2023-11-26 11:46:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:19,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:19,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:19,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:19,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:46:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:20,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-26 11:46:20,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-26 11:46:20,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:46:20,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:20,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174126828] [2023-11-26 11:46:20,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:20,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940357986] [2023-11-26 11:46:20,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940357986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:20,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:20,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:46:20,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464161587] [2023-11-26 11:46:20,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:20,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:46:20,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:46:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:46:20,807 INFO L87 Difference]: Start difference. First operand 354 states and 545 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-26 11:46:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:21,282 INFO L93 Difference]: Finished difference Result 1003 states and 1544 transitions. [2023-11-26 11:46:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:46:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 391 [2023-11-26 11:46:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:21,290 INFO L225 Difference]: With dead ends: 1003 [2023-11-26 11:46:21,290 INFO L226 Difference]: Without dead ends: 650 [2023-11-26 11:46:21,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:46:21,293 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 240 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:21,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 846 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:46:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2023-11-26 11:46:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 527. [2023-11-26 11:46:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 334 states have (on average 1.3203592814371257) internal successors, (441), 334 states have internal predecessors, (441), 183 states have call successors, (183), 9 states have call predecessors, (183), 9 states have return successors, (183), 183 states have call predecessors, (183), 183 states have call successors, (183) [2023-11-26 11:46:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 807 transitions. [2023-11-26 11:46:21,388 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 807 transitions. Word has length 391 [2023-11-26 11:46:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:21,389 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 807 transitions. [2023-11-26 11:46:21,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-26 11:46:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 807 transitions. [2023-11-26 11:46:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-11-26 11:46:21,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:21,394 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:21,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:21,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:21,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:21,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 604220558, now seen corresponding path program 1 times [2023-11-26 11:46:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:21,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107176983] [2023-11-26 11:46:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:21,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:21,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805918699] [2023-11-26 11:46:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:21,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:21,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:21,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:21,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:46:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:22,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-26 11:46:22,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 2992 proven. 0 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2023-11-26 11:46:23,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:46:23,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:23,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107176983] [2023-11-26 11:46:23,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:23,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805918699] [2023-11-26 11:46:23,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805918699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:23,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:23,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:46:23,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881734403] [2023-11-26 11:46:23,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:23,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:46:23,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:23,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:46:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:46:23,383 INFO L87 Difference]: Start difference. First operand 527 states and 807 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-26 11:46:23,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:23,843 INFO L93 Difference]: Finished difference Result 1351 states and 2075 transitions. [2023-11-26 11:46:23,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:46:23,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 393 [2023-11-26 11:46:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:23,855 INFO L225 Difference]: With dead ends: 1351 [2023-11-26 11:46:23,855 INFO L226 Difference]: Without dead ends: 998 [2023-11-26 11:46:23,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:46:23,858 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 314 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:23,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 661 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:46:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2023-11-26 11:46:24,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 995. [2023-11-26 11:46:24,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 610 states have (on average 1.3032786885245902) internal successors, (795), 610 states have internal predecessors, (795), 366 states have call successors, (366), 18 states have call predecessors, (366), 18 states have return successors, (366), 366 states have call predecessors, (366), 366 states have call successors, (366) [2023-11-26 11:46:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1527 transitions. [2023-11-26 11:46:24,017 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1527 transitions. Word has length 393 [2023-11-26 11:46:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:24,018 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1527 transitions. [2023-11-26 11:46:24,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (61), 2 states have call predecessors, (61), 2 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2023-11-26 11:46:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1527 transitions. [2023-11-26 11:46:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-11-26 11:46:24,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:24,023 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:24,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:24,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:24,233 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:24,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1241146608, now seen corresponding path program 1 times [2023-11-26 11:46:24,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:24,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243982686] [2023-11-26 11:46:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:24,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:24,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:24,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565804607] [2023-11-26 11:46:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:24,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:24,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:24,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:24,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:46:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:24,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:46:24,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-26 11:46:26,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:46:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243982686] [2023-11-26 11:46:26,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565804607] [2023-11-26 11:46:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565804607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:46:26,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:46:26,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:46:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407124267] [2023-11-26 11:46:26,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:46:26,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:46:26,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:26,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:46:26,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:46:26,218 INFO L87 Difference]: Start difference. First operand 995 states and 1527 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-26 11:46:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:26,766 INFO L93 Difference]: Finished difference Result 2113 states and 3241 transitions. [2023-11-26 11:46:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:46:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) Word has length 393 [2023-11-26 11:46:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:26,778 INFO L225 Difference]: With dead ends: 2113 [2023-11-26 11:46:26,779 INFO L226 Difference]: Without dead ends: 1232 [2023-11-26 11:46:26,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:46:26,787 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 308 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:26,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 928 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:46:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2023-11-26 11:46:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 995. [2023-11-26 11:46:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 610 states have (on average 1.301639344262295) internal successors, (794), 610 states have internal predecessors, (794), 366 states have call successors, (366), 18 states have call predecessors, (366), 18 states have return successors, (366), 366 states have call predecessors, (366), 366 states have call successors, (366) [2023-11-26 11:46:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1526 transitions. [2023-11-26 11:46:27,008 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1526 transitions. Word has length 393 [2023-11-26 11:46:27,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:27,009 INFO L495 AbstractCegarLoop]: Abstraction has 995 states and 1526 transitions. [2023-11-26 11:46:27,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 1 states have call successors, (61), 1 states have call predecessors, (61), 1 states have return successors, (61), 1 states have call predecessors, (61), 1 states have call successors, (61) [2023-11-26 11:46:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1526 transitions. [2023-11-26 11:46:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2023-11-26 11:46:27,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:27,014 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:27,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:27,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:27,238 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:27,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash 698015438, now seen corresponding path program 1 times [2023-11-26 11:46:27,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:27,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675777410] [2023-11-26 11:46:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:27,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:27,301 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231426323] [2023-11-26 11:46:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:27,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:27,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:27,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:27,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:46:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:27,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 915 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:46:27,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3905 proven. 132 refuted. 0 times theorem prover too weak. 3283 trivial. 0 not checked. [2023-11-26 11:46:28,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 222 proven. 135 refuted. 0 times theorem prover too weak. 6963 trivial. 0 not checked. [2023-11-26 11:46:29,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675777410] [2023-11-26 11:46:29,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:29,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231426323] [2023-11-26 11:46:29,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231426323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:29,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:46:29,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-26 11:46:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496335294] [2023-11-26 11:46:29,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:29,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:46:29,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:29,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:46:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:46:29,793 INFO L87 Difference]: Start difference. First operand 995 states and 1526 transitions. Second operand has 18 states, 18 states have (on average 8.666666666666666) internal successors, (156), 18 states have internal predecessors, (156), 5 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 5 states have call predecessors, (103), 5 states have call successors, (103) [2023-11-26 11:46:31,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:31,731 INFO L93 Difference]: Finished difference Result 2483 states and 3744 transitions. [2023-11-26 11:46:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:46:31,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.666666666666666) internal successors, (156), 18 states have internal predecessors, (156), 5 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 5 states have call predecessors, (103), 5 states have call successors, (103) Word has length 393 [2023-11-26 11:46:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:31,748 INFO L225 Difference]: With dead ends: 2483 [2023-11-26 11:46:31,749 INFO L226 Difference]: Without dead ends: 1606 [2023-11-26 11:46:31,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=658, Unknown=0, NotChecked=0, Total=930 [2023-11-26 11:46:31,755 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 776 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:31,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1290 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-26 11:46:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2023-11-26 11:46:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1403. [2023-11-26 11:46:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 911 states have (on average 1.305159165751921) internal successors, (1189), 916 states have internal predecessors, (1189), 461 states have call successors, (461), 30 states have call predecessors, (461), 30 states have return successors, (461), 456 states have call predecessors, (461), 461 states have call successors, (461) [2023-11-26 11:46:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 2111 transitions. [2023-11-26 11:46:31,961 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 2111 transitions. Word has length 393 [2023-11-26 11:46:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:31,962 INFO L495 AbstractCegarLoop]: Abstraction has 1403 states and 2111 transitions. [2023-11-26 11:46:31,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.666666666666666) internal successors, (156), 18 states have internal predecessors, (156), 5 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 5 states have call predecessors, (103), 5 states have call successors, (103) [2023-11-26 11:46:31,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 2111 transitions. [2023-11-26 11:46:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2023-11-26 11:46:31,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:31,967 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:31,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:32,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:32,174 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:32,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:32,175 INFO L85 PathProgramCache]: Analyzing trace with hash 455394736, now seen corresponding path program 1 times [2023-11-26 11:46:32,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:32,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777721322] [2023-11-26 11:46:32,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:32,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:32,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:32,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171202878] [2023-11-26 11:46:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:32,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:32,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:32,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:46:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:32,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-26 11:46:32,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 4386 proven. 315 refuted. 0 times theorem prover too weak. 2619 trivial. 0 not checked. [2023-11-26 11:46:34,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 207 proven. 324 refuted. 0 times theorem prover too weak. 6789 trivial. 0 not checked. [2023-11-26 11:46:35,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:35,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777721322] [2023-11-26 11:46:35,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:35,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171202878] [2023-11-26 11:46:35,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171202878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:46:35,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:46:35,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-26 11:46:35,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474047878] [2023-11-26 11:46:35,734 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:46:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:46:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:46:35,738 INFO L87 Difference]: Start difference. First operand 1403 states and 2111 transitions. Second operand has 25 states, 25 states have (on average 6.6) internal successors, (165), 25 states have internal predecessors, (165), 6 states have call successors, (102), 4 states have call predecessors, (102), 10 states have return successors, (103), 6 states have call predecessors, (103), 6 states have call successors, (103) [2023-11-26 11:46:38,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:38,558 INFO L93 Difference]: Finished difference Result 3771 states and 5609 transitions. [2023-11-26 11:46:38,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-26 11:46:38,559 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.6) internal successors, (165), 25 states have internal predecessors, (165), 6 states have call successors, (102), 4 states have call predecessors, (102), 10 states have return successors, (103), 6 states have call predecessors, (103), 6 states have call successors, (103) Word has length 394 [2023-11-26 11:46:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:38,580 INFO L225 Difference]: With dead ends: 3771 [2023-11-26 11:46:38,580 INFO L226 Difference]: Without dead ends: 2745 [2023-11-26 11:46:38,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 764 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=596, Invalid=1566, Unknown=0, NotChecked=0, Total=2162 [2023-11-26 11:46:38,589 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 799 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:38,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 1455 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-26 11:46:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2023-11-26 11:46:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 1502. [2023-11-26 11:46:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 998 states have (on average 1.313627254509018) internal successors, (1311), 1003 states have internal predecessors, (1311), 461 states have call successors, (461), 42 states have call predecessors, (461), 42 states have return successors, (461), 456 states have call predecessors, (461), 461 states have call successors, (461) [2023-11-26 11:46:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 2233 transitions. [2023-11-26 11:46:38,932 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 2233 transitions. Word has length 394 [2023-11-26 11:46:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:38,933 INFO L495 AbstractCegarLoop]: Abstraction has 1502 states and 2233 transitions. [2023-11-26 11:46:38,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.6) internal successors, (165), 25 states have internal predecessors, (165), 6 states have call successors, (102), 4 states have call predecessors, (102), 10 states have return successors, (103), 6 states have call predecessors, (103), 6 states have call successors, (103) [2023-11-26 11:46:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 2233 transitions. [2023-11-26 11:46:38,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2023-11-26 11:46:38,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:38,938 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:38,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:39,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:39,151 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:39,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1675025454, now seen corresponding path program 1 times [2023-11-26 11:46:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:39,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797443865] [2023-11-26 11:46:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:39,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:39,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:39,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73922703] [2023-11-26 11:46:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:39,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:39,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:39,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:39,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:46:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:40,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 11:46:40,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 3657 proven. 144 refuted. 0 times theorem prover too weak. 3519 trivial. 0 not checked. [2023-11-26 11:46:40,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:46:45,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:46:45,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797443865] [2023-11-26 11:46:45,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:46:45,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73922703] [2023-11-26 11:46:45,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73922703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:46:45,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:46:45,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-26 11:46:45,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966427337] [2023-11-26 11:46:45,237 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:46:45,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:46:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:46:45,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:46:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=77, Unknown=1, NotChecked=0, Total=110 [2023-11-26 11:46:45,239 INFO L87 Difference]: Start difference. First operand 1502 states and 2233 transitions. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 8 states have internal predecessors, (101), 3 states have call successors, (61), 3 states have call predecessors, (61), 4 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) [2023-11-26 11:46:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:46:47,033 INFO L93 Difference]: Finished difference Result 3862 states and 5664 transitions. [2023-11-26 11:46:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:46:47,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 8 states have internal predecessors, (101), 3 states have call successors, (61), 3 states have call predecessors, (61), 4 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) Word has length 394 [2023-11-26 11:46:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:46:47,057 INFO L225 Difference]: With dead ends: 3862 [2023-11-26 11:46:47,057 INFO L226 Difference]: Without dead ends: 2494 [2023-11-26 11:46:47,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=110, Invalid=231, Unknown=1, NotChecked=0, Total=342 [2023-11-26 11:46:47,063 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 396 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:46:47,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1128 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:46:47,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2023-11-26 11:46:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2040. [2023-11-26 11:46:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 1404 states have (on average 1.311965811965812) internal successors, (1842), 1414 states have internal predecessors, (1842), 566 states have call successors, (566), 69 states have call predecessors, (566), 69 states have return successors, (566), 556 states have call predecessors, (566), 566 states have call successors, (566) [2023-11-26 11:46:47,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2974 transitions. [2023-11-26 11:46:47,400 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2974 transitions. Word has length 394 [2023-11-26 11:46:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:46:47,401 INFO L495 AbstractCegarLoop]: Abstraction has 2040 states and 2974 transitions. [2023-11-26 11:46:47,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 8 states have internal predecessors, (101), 3 states have call successors, (61), 3 states have call predecessors, (61), 4 states have return successors, (61), 3 states have call predecessors, (61), 3 states have call successors, (61) [2023-11-26 11:46:47,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2974 transitions. [2023-11-26 11:46:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2023-11-26 11:46:47,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:46:47,407 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:46:47,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:46:47,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:47,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:46:47,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:46:47,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1775936340, now seen corresponding path program 1 times [2023-11-26 11:46:47,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:46:47,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781672017] [2023-11-26 11:46:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:47,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:46:47,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:46:47,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893487724] [2023-11-26 11:46:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:46:47,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:46:47,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:46:47,689 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:46:47,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5a0f0af-e3b9-40a8-a795-f9b30691be24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:46:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:46:48,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-26 11:46:48,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:46:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 5158 proven. 381 refuted. 0 times theorem prover too weak. 1781 trivial. 0 not checked. [2023-11-26 11:46:53,046 INFO L327 TraceCheckSpWp]: Computing backward predicates...