./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-80.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/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_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-80.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/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_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/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 298f84c919935b35b8e8a43effc55ce37a03026afe93c4d386d1bd2fb71c0597 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:57:43,253 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:57:43,366 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:57:43,372 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:57:43,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:57:43,402 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:57:43,403 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:57:43,403 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:57:43,404 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:57:43,405 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:57:43,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:57:43,406 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:57:43,407 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:57:43,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:57:43,408 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:57:43,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:57:43,410 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:57:43,411 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:57:43,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:57:43,412 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:57:43,413 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:57:43,413 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:57:43,414 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:57:43,415 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:57:43,415 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:57:43,416 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:57:43,416 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:57:43,417 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:57:43,417 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:57:43,418 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:57:43,418 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:57:43,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:43,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:57:43,420 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:57:43,420 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:57:43,421 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:57:43,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:57:43,422 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:57:43,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:57:43,423 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:57:43,423 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:57:43,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:57:43,424 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_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 298f84c919935b35b8e8a43effc55ce37a03026afe93c4d386d1bd2fb71c0597 [2023-11-26 11:57:43,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:57:43,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:57:43,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:57:43,744 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:57:43,746 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:57:43,772 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-80.i [2023-11-26 11:57:46,934 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:57:47,279 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:57:47,280 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-80.i [2023-11-26 11:57:47,297 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/data/53f623efc/7ee224d6438748c59abbed030c4711a5/FLAG3185897f8 [2023-11-26 11:57:47,312 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/data/53f623efc/7ee224d6438748c59abbed030c4711a5 [2023-11-26 11:57:47,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:57:47,317 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:57:47,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:47,319 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:57:47,335 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:57:47,337 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:47" (1/1) ... [2023-11-26 11:57:47,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@742d4958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:47, skipping insertion in model container [2023-11-26 11:57:47,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:57:47" (1/1) ... [2023-11-26 11:57:47,487 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:57:47,677 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_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-80.i[916,929] [2023-11-26 11:57:48,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:48,026 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:57:48,043 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_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-80.i[916,929] [2023-11-26 11:57:48,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:57:48,275 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:57:48,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48 WrapperNode [2023-11-26 11:57:48,276 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:57:48,277 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:48,277 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:57:48,277 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:57:48,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,321 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,444 INFO L138 Inliner]: procedures = 26, calls = 82, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 726 [2023-11-26 11:57:48,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:57:48,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:57:48,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:57:48,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:57:48,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,485 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,594 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 11:57:48,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,699 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,739 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:57:48,769 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:57:48,769 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:57:48,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:57:48,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (1/1) ... [2023-11-26 11:57:48,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:57:48,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:48,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:57:48,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:57:48,855 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:57:48,856 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:57:48,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:57:48,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:57:48,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:57:48,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:57:49,047 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:57:49,050 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:57:50,406 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:57:50,503 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:57:50,503 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:57:50,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:50 BoogieIcfgContainer [2023-11-26 11:57:50,504 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:57:50,508 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:57:50,508 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:57:50,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:57:50,512 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:57:47" (1/3) ... [2023-11-26 11:57:50,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33dd6fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:50, skipping insertion in model container [2023-11-26 11:57:50,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:57:48" (2/3) ... [2023-11-26 11:57:50,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33dd6fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:57:50, skipping insertion in model container [2023-11-26 11:57:50,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:57:50" (3/3) ... [2023-11-26 11:57:50,518 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-80.i [2023-11-26 11:57:50,538 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:57:50,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:57:50,617 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:57:50,627 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;@43cf7a07, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:57:50,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:57:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 289 states, 217 states have (on average 1.5944700460829493) internal successors, (346), 218 states have internal predecessors, (346), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-26 11:57:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-11-26 11:57:50,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:50,696 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:50,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:50,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:50,706 INFO L85 PathProgramCache]: Analyzing trace with hash -537129120, now seen corresponding path program 1 times [2023-11-26 11:57:50,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534018363] [2023-11-26 11:57:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:51,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:51,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534018363] [2023-11-26 11:57:51,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:57:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818626691] [2023-11-26 11:57:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:51,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:51,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:51,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:51,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:57:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:51,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:57:51,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2023-11-26 11:57:51,918 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:51,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818626691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:51,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:51,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:57:51,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915815603] [2023-11-26 11:57:51,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:57:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:51,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:57:51,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:57:51,998 INFO L87 Difference]: Start difference. First operand has 289 states, 217 states have (on average 1.5944700460829493) internal successors, (346), 218 states have internal predecessors, (346), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-26 11:57:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:52,122 INFO L93 Difference]: Finished difference Result 575 states and 1035 transitions. [2023-11-26 11:57:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:57:52,126 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) Word has length 479 [2023-11-26 11:57:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:52,139 INFO L225 Difference]: With dead ends: 575 [2023-11-26 11:57:52,139 INFO L226 Difference]: Without dead ends: 287 [2023-11-26 11:57:52,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 478 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 11:57:52,157 INFO L413 NwaCegarLoop]: 476 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, 476 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 11:57:52,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 476 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-26 11:57:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-11-26 11:57:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 216 states have (on average 1.5787037037037037) internal successors, (341), 216 states have internal predecessors, (341), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-26 11:57:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 479 transitions. [2023-11-26 11:57:52,257 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 479 transitions. Word has length 479 [2023-11-26 11:57:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:52,258 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 479 transitions. [2023-11-26 11:57:52,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-26 11:57:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 479 transitions. [2023-11-26 11:57:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2023-11-26 11:57:52,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:52,271 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:52,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:52,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 11:57:52,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:52,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:52,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1715395102, now seen corresponding path program 1 times [2023-11-26 11:57:52,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536540753] [2023-11-26 11:57:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:52,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:52,679 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:52,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199677915] [2023-11-26 11:57:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:52,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:52,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:52,691 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:52,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:57:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:53,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:57:53,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:57:53,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:53,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:53,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536540753] [2023-11-26 11:57:53,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:53,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199677915] [2023-11-26 11:57:53,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199677915] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:53,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:53,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:53,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954434083] [2023-11-26 11:57:53,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:53,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:53,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:53,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:53,325 INFO L87 Difference]: Start difference. First operand 287 states and 479 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:53,521 INFO L93 Difference]: Finished difference Result 727 states and 1212 transitions. [2023-11-26 11:57:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 479 [2023-11-26 11:57:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:53,537 INFO L225 Difference]: With dead ends: 727 [2023-11-26 11:57:53,537 INFO L226 Difference]: Without dead ends: 441 [2023-11-26 11:57:53,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 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 11:57:53,542 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 242 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:53,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 908 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-26 11:57:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 438. [2023-11-26 11:57:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 364 states have (on average 1.6071428571428572) internal successors, (585), 365 states have internal predecessors, (585), 71 states have call successors, (71), 2 states have call predecessors, (71), 2 states have return successors, (71), 70 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-26 11:57:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 727 transitions. [2023-11-26 11:57:53,604 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 727 transitions. Word has length 479 [2023-11-26 11:57:53,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:53,606 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 727 transitions. [2023-11-26 11:57:53,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 727 transitions. [2023-11-26 11:57:53,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-26 11:57:53,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:53,620 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:53,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:53,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:53,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:53,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:53,830 INFO L85 PathProgramCache]: Analyzing trace with hash 153325564, now seen corresponding path program 1 times [2023-11-26 11:57:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:53,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609129613] [2023-11-26 11:57:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:53,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:53,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:53,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817652762] [2023-11-26 11:57:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:53,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:53,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:53,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:53,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:57:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:54,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:57:54,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:57:54,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609129613] [2023-11-26 11:57:54,469 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:54,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817652762] [2023-11-26 11:57:54,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817652762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:54,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:54,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:54,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049312000] [2023-11-26 11:57:54,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:54,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:54,473 INFO L87 Difference]: Start difference. First operand 438 states and 727 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:54,608 INFO L93 Difference]: Finished difference Result 1197 states and 1986 transitions. [2023-11-26 11:57:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:54,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 480 [2023-11-26 11:57:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:54,617 INFO L225 Difference]: With dead ends: 1197 [2023-11-26 11:57:54,618 INFO L226 Difference]: Without dead ends: 760 [2023-11-26 11:57:54,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 11:57:54,621 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 288 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:54,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1121 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2023-11-26 11:57:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 757. [2023-11-26 11:57:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 666 states have (on average 1.6216216216216217) internal successors, (1080), 669 states have internal predecessors, (1080), 86 states have call successors, (86), 4 states have call predecessors, (86), 4 states have return successors, (86), 83 states have call predecessors, (86), 86 states have call successors, (86) [2023-11-26 11:57:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1252 transitions. [2023-11-26 11:57:54,678 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1252 transitions. Word has length 480 [2023-11-26 11:57:54,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:54,680 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1252 transitions. [2023-11-26 11:57:54,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1252 transitions. [2023-11-26 11:57:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-26 11:57:54,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:54,686 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:54,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:54,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:54,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:54,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:54,899 INFO L85 PathProgramCache]: Analyzing trace with hash -989176902, now seen corresponding path program 1 times [2023-11-26 11:57:54,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:54,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702259667] [2023-11-26 11:57:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:54,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:55,007 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:55,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184424571] [2023-11-26 11:57:55,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:55,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:55,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:55,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:57:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:55,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:57:55,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:57:55,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:55,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:55,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702259667] [2023-11-26 11:57:55,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:55,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184424571] [2023-11-26 11:57:55,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184424571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:55,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:55,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:55,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611992997] [2023-11-26 11:57:55,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:55,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:55,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:55,669 INFO L87 Difference]: Start difference. First operand 757 states and 1252 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:55,796 INFO L93 Difference]: Finished difference Result 1520 states and 2508 transitions. [2023-11-26 11:57:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:55,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 480 [2023-11-26 11:57:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:55,805 INFO L225 Difference]: With dead ends: 1520 [2023-11-26 11:57:55,805 INFO L226 Difference]: Without dead ends: 764 [2023-11-26 11:57:55,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 11:57:55,808 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 233 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:55,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1010 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:55,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2023-11-26 11:57:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 644. [2023-11-26 11:57:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 569 states have (on average 1.6502636203866432) internal successors, (939), 570 states have internal predecessors, (939), 71 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (71), 70 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-26 11:57:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1081 transitions. [2023-11-26 11:57:55,853 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1081 transitions. Word has length 480 [2023-11-26 11:57:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:55,855 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1081 transitions. [2023-11-26 11:57:55,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:55,856 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1081 transitions. [2023-11-26 11:57:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-26 11:57:55,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:55,862 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:55,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:56,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:56,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash 793333179, now seen corresponding path program 1 times [2023-11-26 11:57:56,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:56,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605490033] [2023-11-26 11:57:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:56,162 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:56,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900231338] [2023-11-26 11:57:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:56,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:56,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:56,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:56,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:57:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:56,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:57:56,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:57:56,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:56,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:56,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605490033] [2023-11-26 11:57:56,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:56,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900231338] [2023-11-26 11:57:56,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900231338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:56,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:56,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:56,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076472481] [2023-11-26 11:57:56,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:56,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:56,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:56,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:56,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:56,724 INFO L87 Difference]: Start difference. First operand 644 states and 1081 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:56,834 INFO L93 Difference]: Finished difference Result 1918 states and 3221 transitions. [2023-11-26 11:57:56,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 480 [2023-11-26 11:57:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:56,847 INFO L225 Difference]: With dead ends: 1918 [2023-11-26 11:57:56,848 INFO L226 Difference]: Without dead ends: 1275 [2023-11-26 11:57:56,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 11:57:56,852 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 467 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:56,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 1178 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:57:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2023-11-26 11:57:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 664. [2023-11-26 11:57:56,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 589 states have (on average 1.6451612903225807) internal successors, (969), 590 states have internal predecessors, (969), 71 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (71), 70 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-26 11:57:56,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1111 transitions. [2023-11-26 11:57:56,928 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1111 transitions. Word has length 480 [2023-11-26 11:57:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:56,930 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1111 transitions. [2023-11-26 11:57:56,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:56,931 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1111 transitions. [2023-11-26 11:57:56,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-26 11:57:56,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:56,938 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:56,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:57:57,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:57,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:57,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:57,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1099921019, now seen corresponding path program 1 times [2023-11-26 11:57:57,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:57,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773514734] [2023-11-26 11:57:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:57,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:57,245 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:57,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899202300] [2023-11-26 11:57:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:57,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:57,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:57,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:57,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:57:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:57,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 11:57:57,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:57:57,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:57,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:57,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773514734] [2023-11-26 11:57:57,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:57,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899202300] [2023-11-26 11:57:57,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899202300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:57,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:57,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:57:57,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728566873] [2023-11-26 11:57:57,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:57:57,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:57,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:57:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:57:57,815 INFO L87 Difference]: Start difference. First operand 664 states and 1111 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:57,923 INFO L93 Difference]: Finished difference Result 1944 states and 3247 transitions. [2023-11-26 11:57:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:57:57,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 480 [2023-11-26 11:57:57,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:57,934 INFO L225 Difference]: With dead ends: 1944 [2023-11-26 11:57:57,934 INFO L226 Difference]: Without dead ends: 1281 [2023-11-26 11:57:57,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 11:57:57,937 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 429 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:57,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 918 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:57:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2023-11-26 11:57:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1279. [2023-11-26 11:57:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1130 states have (on average 1.6300884955752213) internal successors, (1842), 1132 states have internal predecessors, (1842), 142 states have call successors, (142), 6 states have call predecessors, (142), 6 states have return successors, (142), 140 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-26 11:57:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 2126 transitions. [2023-11-26 11:57:58,049 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 2126 transitions. Word has length 480 [2023-11-26 11:57:58,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:58,050 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 2126 transitions. [2023-11-26 11:57:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 2126 transitions. [2023-11-26 11:57:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-26 11:57:58,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:58,059 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:58,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:58,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:57:58,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:58,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash -894223687, now seen corresponding path program 1 times [2023-11-26 11:57:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:58,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919951840] [2023-11-26 11:57:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:58,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:58,358 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:58,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142452905] [2023-11-26 11:57:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:58,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:58,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:58,360 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:58,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:57:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:57:58,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:57:58,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:57:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:57:58,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:57:58,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:57:58,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919951840] [2023-11-26 11:57:58,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:57:58,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142452905] [2023-11-26 11:57:58,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142452905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:57:58,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:57:58,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:57:58,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767067587] [2023-11-26 11:57:58,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:57:58,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:57:58,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:57:58,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:57:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:57:58,949 INFO L87 Difference]: Start difference. First operand 1279 states and 2126 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:57:59,225 INFO L93 Difference]: Finished difference Result 3525 states and 5848 transitions. [2023-11-26 11:57:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:57:59,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 480 [2023-11-26 11:57:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:57:59,242 INFO L225 Difference]: With dead ends: 3525 [2023-11-26 11:57:59,242 INFO L226 Difference]: Without dead ends: 2247 [2023-11-26 11:57:59,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 478 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 11:57:59,246 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 713 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:57:59,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 1067 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:57:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2023-11-26 11:57:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2185. [2023-11-26 11:57:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2034 states have (on average 1.6273352999016715) internal successors, (3310), 2036 states have internal predecessors, (3310), 142 states have call successors, (142), 8 states have call predecessors, (142), 8 states have return successors, (142), 140 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-26 11:57:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 3594 transitions. [2023-11-26 11:57:59,360 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 3594 transitions. Word has length 480 [2023-11-26 11:57:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:57:59,361 INFO L495 AbstractCegarLoop]: Abstraction has 2185 states and 3594 transitions. [2023-11-26 11:57:59,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:57:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 3594 transitions. [2023-11-26 11:57:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-26 11:57:59,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:57:59,391 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:57:59,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:57:59,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:59,595 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:57:59,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:57:59,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1134362423, now seen corresponding path program 1 times [2023-11-26 11:57:59,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:57:59,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610277344] [2023-11-26 11:57:59,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:59,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:57:59,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:57:59,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511908940] [2023-11-26 11:57:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:57:59,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:57:59,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:57:59,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:57:59,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:58:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:00,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:58:00,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:58:00,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:00,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:00,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610277344] [2023-11-26 11:58:00,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:00,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511908940] [2023-11-26 11:58:00,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511908940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:00,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:00,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:58:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775655873] [2023-11-26 11:58:00,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:00,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:58:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:58:00,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:58:00,276 INFO L87 Difference]: Start difference. First operand 2185 states and 3594 transitions. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:00,592 INFO L93 Difference]: Finished difference Result 4479 states and 7336 transitions. [2023-11-26 11:58:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:58:00,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 480 [2023-11-26 11:58:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:00,608 INFO L225 Difference]: With dead ends: 4479 [2023-11-26 11:58:00,609 INFO L226 Difference]: Without dead ends: 2247 [2023-11-26 11:58:00,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:58:00,614 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 919 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1430 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:00,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 1430 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:58:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2023-11-26 11:58:00,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 2185. [2023-11-26 11:58:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2034 states have (on average 1.5998033431661751) internal successors, (3254), 2036 states have internal predecessors, (3254), 142 states have call successors, (142), 8 states have call predecessors, (142), 8 states have return successors, (142), 140 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-26 11:58:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 3538 transitions. [2023-11-26 11:58:00,724 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 3538 transitions. Word has length 480 [2023-11-26 11:58:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:00,725 INFO L495 AbstractCegarLoop]: Abstraction has 2185 states and 3538 transitions. [2023-11-26 11:58:00,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 3538 transitions. [2023-11-26 11:58:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2023-11-26 11:58:00,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:00,734 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:00,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:00,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:00,942 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:00,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash -648935865, now seen corresponding path program 1 times [2023-11-26 11:58:00,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:00,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234654154] [2023-11-26 11:58:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:00,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:01,056 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:01,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682240762] [2023-11-26 11:58:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:01,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:01,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:01,063 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:01,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:58:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:01,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:58:01,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:58:01,613 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:01,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:01,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234654154] [2023-11-26 11:58:01,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:01,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682240762] [2023-11-26 11:58:01,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682240762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:01,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:01,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:58:01,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865375841] [2023-11-26 11:58:01,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:01,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:01,621 INFO L87 Difference]: Start difference. First operand 2185 states and 3538 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:01,948 INFO L93 Difference]: Finished difference Result 6541 states and 10440 transitions. [2023-11-26 11:58:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:58:01,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 480 [2023-11-26 11:58:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:01,987 INFO L225 Difference]: With dead ends: 6541 [2023-11-26 11:58:01,987 INFO L226 Difference]: Without dead ends: 4357 [2023-11-26 11:58:01,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 478 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 11:58:01,995 INFO L413 NwaCegarLoop]: 950 mSDtfsCounter, 976 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 2231 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:01,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 2231 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:58:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2023-11-26 11:58:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 2165. [2023-11-26 11:58:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2014 states have (on average 1.595829195630586) internal successors, (3214), 2016 states have internal predecessors, (3214), 142 states have call successors, (142), 8 states have call predecessors, (142), 8 states have return successors, (142), 140 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-26 11:58:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3498 transitions. [2023-11-26 11:58:02,280 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3498 transitions. Word has length 480 [2023-11-26 11:58:02,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:02,281 INFO L495 AbstractCegarLoop]: Abstraction has 2165 states and 3498 transitions. [2023-11-26 11:58:02,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3498 transitions. [2023-11-26 11:58:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-11-26 11:58:02,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:02,293 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:02,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:02,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:02,502 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:02,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:02,503 INFO L85 PathProgramCache]: Analyzing trace with hash -201370355, now seen corresponding path program 1 times [2023-11-26 11:58:02,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:02,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469512246] [2023-11-26 11:58:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:02,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:02,604 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:02,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101990627] [2023-11-26 11:58:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:02,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:02,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:02,606 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:02,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:58:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:03,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:58:03,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:58:03,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:03,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:03,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469512246] [2023-11-26 11:58:03,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:03,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101990627] [2023-11-26 11:58:03,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101990627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:03,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:03,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:58:03,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194697470] [2023-11-26 11:58:03,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:03,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:03,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:03,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:03,190 INFO L87 Difference]: Start difference. First operand 2165 states and 3498 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:03,509 INFO L93 Difference]: Finished difference Result 5597 states and 8987 transitions. [2023-11-26 11:58:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:58:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 481 [2023-11-26 11:58:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:03,531 INFO L225 Difference]: With dead ends: 5597 [2023-11-26 11:58:03,531 INFO L226 Difference]: Without dead ends: 3433 [2023-11-26 11:58:03,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 479 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 11:58:03,538 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 898 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:03,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 2133 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:58:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3433 states. [2023-11-26 11:58:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3433 to 2258. [2023-11-26 11:58:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2258 states, 2111 states have (on average 1.577451444812885) internal successors, (3330), 2111 states have internal predecessors, (3330), 138 states have call successors, (138), 8 states have call predecessors, (138), 8 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-26 11:58:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3606 transitions. [2023-11-26 11:58:03,742 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3606 transitions. Word has length 481 [2023-11-26 11:58:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:03,743 INFO L495 AbstractCegarLoop]: Abstraction has 2258 states and 3606 transitions. [2023-11-26 11:58:03,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:03,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3606 transitions. [2023-11-26 11:58:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-11-26 11:58:03,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:03,755 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:03,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:03,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:03,964 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:03,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1875966543, now seen corresponding path program 1 times [2023-11-26 11:58:03,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:03,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708897984] [2023-11-26 11:58:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:03,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:04,048 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:04,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089036578] [2023-11-26 11:58:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:04,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:04,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:04,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:04,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:58:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:04,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:58:04,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:58:06,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:06,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708897984] [2023-11-26 11:58:06,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089036578] [2023-11-26 11:58:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089036578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:06,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:06,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:58:06,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633960887] [2023-11-26 11:58:06,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:06,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:58:06,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:06,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:58:06,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:58:06,082 INFO L87 Difference]: Start difference. First operand 2258 states and 3606 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:06,516 INFO L93 Difference]: Finished difference Result 6827 states and 10891 transitions. [2023-11-26 11:58:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:58:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 481 [2023-11-26 11:58:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:06,545 INFO L225 Difference]: With dead ends: 6827 [2023-11-26 11:58:06,545 INFO L226 Difference]: Without dead ends: 4570 [2023-11-26 11:58:06,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 478 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 11:58:06,551 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 673 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:06,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1567 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:58:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2023-11-26 11:58:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 4027. [2023-11-26 11:58:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4027 states, 3734 states have (on average 1.5757900374933047) internal successors, (5884), 3734 states have internal predecessors, (5884), 276 states have call successors, (276), 16 states have call predecessors, (276), 16 states have return successors, (276), 276 states have call predecessors, (276), 276 states have call successors, (276) [2023-11-26 11:58:06,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 6436 transitions. [2023-11-26 11:58:06,829 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 6436 transitions. Word has length 481 [2023-11-26 11:58:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:06,830 INFO L495 AbstractCegarLoop]: Abstraction has 4027 states and 6436 transitions. [2023-11-26 11:58:06,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 6436 transitions. [2023-11-26 11:58:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-11-26 11:58:06,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:06,840 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:06,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:07,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:07,049 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:07,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:07,050 INFO L85 PathProgramCache]: Analyzing trace with hash -800025839, now seen corresponding path program 1 times [2023-11-26 11:58:07,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:07,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934161306] [2023-11-26 11:58:07,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:07,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:07,129 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:07,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273666519] [2023-11-26 11:58:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:07,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:07,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:07,131 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:07,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:58:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:07,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 1216 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:58:07,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-26 11:58:08,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:58:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934161306] [2023-11-26 11:58:08,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273666519] [2023-11-26 11:58:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273666519] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:58:08,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:58:08,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:58:08,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879530508] [2023-11-26 11:58:08,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:58:08,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:58:08,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:58:08,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:58:08,546 INFO L87 Difference]: Start difference. First operand 4027 states and 6436 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:10,314 INFO L93 Difference]: Finished difference Result 11027 states and 17544 transitions. [2023-11-26 11:58:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:58:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 481 [2023-11-26 11:58:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:10,389 INFO L225 Difference]: With dead ends: 11027 [2023-11-26 11:58:10,392 INFO L226 Difference]: Without dead ends: 8672 [2023-11-26 11:58:10,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:58:10,401 INFO L413 NwaCegarLoop]: 1115 mSDtfsCounter, 3777 mSDsluCounter, 3840 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3777 SdHoareTripleChecker+Valid, 4955 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:10,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3777 Valid, 4955 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-26 11:58:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8672 states. [2023-11-26 11:58:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8672 to 6711. [2023-11-26 11:58:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6711 states, 6199 states have (on average 1.5744474915308921) internal successors, (9760), 6199 states have internal predecessors, (9760), 483 states have call successors, (483), 28 states have call predecessors, (483), 28 states have return successors, (483), 483 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-26 11:58:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6711 states to 6711 states and 10726 transitions. [2023-11-26 11:58:10,841 INFO L78 Accepts]: Start accepts. Automaton has 6711 states and 10726 transitions. Word has length 481 [2023-11-26 11:58:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:10,842 INFO L495 AbstractCegarLoop]: Abstraction has 6711 states and 10726 transitions. [2023-11-26 11:58:10,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-26 11:58:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6711 states and 10726 transitions. [2023-11-26 11:58:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-11-26 11:58:10,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:10,852 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:10,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:11,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:58:11,065 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:11,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:11,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1268680449, now seen corresponding path program 1 times [2023-11-26 11:58:11,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:11,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308745876] [2023-11-26 11:58:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:11,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:11,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:11,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797926967] [2023-11-26 11:58:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:11,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:11,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:11,166 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:11,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-26 11:58:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:11,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:58:11,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3120 proven. 162 refuted. 0 times theorem prover too weak. 6102 trivial. 0 not checked. [2023-11-26 11:58:12,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 42 proven. 162 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-26 11:58:12,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:12,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308745876] [2023-11-26 11:58:12,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:12,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797926967] [2023-11-26 11:58:12,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797926967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:12,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:12,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:58:12,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393250678] [2023-11-26 11:58:12,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:12,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:58:12,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:58:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:58:12,850 INFO L87 Difference]: Start difference. First operand 6711 states and 10726 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-26 11:58:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:13,530 INFO L93 Difference]: Finished difference Result 10984 states and 17495 transitions. [2023-11-26 11:58:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:58:13,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) Word has length 481 [2023-11-26 11:58:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:13,544 INFO L225 Difference]: With dead ends: 10984 [2023-11-26 11:58:13,545 INFO L226 Difference]: Without dead ends: 4274 [2023-11-26 11:58:13,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 954 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:58:13,559 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 601 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:13,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1017 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:58:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2023-11-26 11:58:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 4232. [2023-11-26 11:58:13,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4232 states, 3713 states have (on average 1.5459197414489632) internal successors, (5740), 3713 states have internal predecessors, (5740), 483 states have call successors, (483), 35 states have call predecessors, (483), 35 states have return successors, (483), 483 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-26 11:58:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4232 states to 4232 states and 6706 transitions. [2023-11-26 11:58:13,826 INFO L78 Accepts]: Start accepts. Automaton has 4232 states and 6706 transitions. Word has length 481 [2023-11-26 11:58:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:13,827 INFO L495 AbstractCegarLoop]: Abstraction has 4232 states and 6706 transitions. [2023-11-26 11:58:13,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-26 11:58:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 4232 states and 6706 transitions. [2023-11-26 11:58:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2023-11-26 11:58:13,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:13,835 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:13,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:14,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:14,043 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:14,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1292196752, now seen corresponding path program 1 times [2023-11-26 11:58:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:14,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033056078] [2023-11-26 11:58:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:14,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:14,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:14,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982015852] [2023-11-26 11:58:14,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:14,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:14,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:14,145 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:14,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-26 11:58:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:14,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:58:14,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 1100 proven. 192 refuted. 0 times theorem prover too weak. 8092 trivial. 0 not checked. [2023-11-26 11:58:15,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 12 proven. 192 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-26 11:58:16,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:16,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033056078] [2023-11-26 11:58:16,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:16,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982015852] [2023-11-26 11:58:16,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982015852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:16,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:16,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:58:16,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075168612] [2023-11-26 11:58:16,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:16,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:58:16,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:16,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:58:16,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:58:16,025 INFO L87 Difference]: Start difference. First operand 4232 states and 6706 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-11-26 11:58:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:16,769 INFO L93 Difference]: Finished difference Result 7370 states and 11561 transitions. [2023-11-26 11:58:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:58:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) Word has length 481 [2023-11-26 11:58:16,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:16,780 INFO L225 Difference]: With dead ends: 7370 [2023-11-26 11:58:16,780 INFO L226 Difference]: Without dead ends: 2721 [2023-11-26 11:58:16,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 954 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:58:16,790 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 238 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:16,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 951 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:58:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2023-11-26 11:58:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2663. [2023-11-26 11:58:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2137 states have (on average 1.4749649040711277) internal successors, (3152), 2137 states have internal predecessors, (3152), 483 states have call successors, (483), 42 states have call predecessors, (483), 42 states have return successors, (483), 483 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-26 11:58:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 4118 transitions. [2023-11-26 11:58:17,061 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 4118 transitions. Word has length 481 [2023-11-26 11:58:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:17,062 INFO L495 AbstractCegarLoop]: Abstraction has 2663 states and 4118 transitions. [2023-11-26 11:58:17,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-11-26 11:58:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 4118 transitions. [2023-11-26 11:58:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-26 11:58:17,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:17,068 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:17,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:17,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:17,277 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:17,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2123196325, now seen corresponding path program 1 times [2023-11-26 11:58:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:17,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521676084] [2023-11-26 11:58:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:17,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:17,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755546126] [2023-11-26 11:58:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:17,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:17,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:17,355 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:17,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-26 11:58:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:17,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:58:17,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 600 proven. 198 refuted. 0 times theorem prover too weak. 8586 trivial. 0 not checked. [2023-11-26 11:58:18,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 6 proven. 198 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-26 11:58:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521676084] [2023-11-26 11:58:19,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:19,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755546126] [2023-11-26 11:58:19,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755546126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:19,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:19,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-26 11:58:19,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436550099] [2023-11-26 11:58:19,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:19,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:58:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:19,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:58:19,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:58:19,051 INFO L87 Difference]: Start difference. First operand 2663 states and 4118 transitions. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-26 11:58:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:19,601 INFO L93 Difference]: Finished difference Result 3594 states and 5522 transitions. [2023-11-26 11:58:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:58:19,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 482 [2023-11-26 11:58:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:19,607 INFO L225 Difference]: With dead ends: 3594 [2023-11-26 11:58:19,607 INFO L226 Difference]: Without dead ends: 932 [2023-11-26 11:58:19,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 956 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:58:19,614 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 249 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:19,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 875 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 11:58:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2023-11-26 11:58:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 914. [2023-11-26 11:58:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 685 states have (on average 1.416058394160584) internal successors, (970), 685 states have internal predecessors, (970), 207 states have call successors, (207), 21 states have call predecessors, (207), 21 states have return successors, (207), 207 states have call predecessors, (207), 207 states have call successors, (207) [2023-11-26 11:58:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1384 transitions. [2023-11-26 11:58:19,749 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1384 transitions. Word has length 482 [2023-11-26 11:58:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:19,750 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1384 transitions. [2023-11-26 11:58:19,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-26 11:58:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1384 transitions. [2023-11-26 11:58:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-26 11:58:19,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:19,755 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:19,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:19,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:19,965 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:19,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1247618350, now seen corresponding path program 1 times [2023-11-26 11:58:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:19,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243756385] [2023-11-26 11:58:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:20,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734406455] [2023-11-26 11:58:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:20,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:20,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:20,046 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:20,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-26 11:58:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:20,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:58:20,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3830 proven. 147 refuted. 0 times theorem prover too weak. 5407 trivial. 0 not checked. [2023-11-26 11:58:21,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:22,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 57 proven. 147 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-26 11:58:22,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:22,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243756385] [2023-11-26 11:58:22,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:22,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734406455] [2023-11-26 11:58:22,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734406455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:22,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:22,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2023-11-26 11:58:22,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248001760] [2023-11-26 11:58:22,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:22,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:58:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:58:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:58:22,097 INFO L87 Difference]: Start difference. First operand 914 states and 1384 transitions. Second operand has 12 states, 12 states have (on average 17.5) internal successors, (210), 12 states have internal predecessors, (210), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) [2023-11-26 11:58:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:23,140 INFO L93 Difference]: Finished difference Result 1691 states and 2542 transitions. [2023-11-26 11:58:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:58:23,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.5) internal successors, (210), 12 states have internal predecessors, (210), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) Word has length 482 [2023-11-26 11:58:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:23,145 INFO L225 Difference]: With dead ends: 1691 [2023-11-26 11:58:23,145 INFO L226 Difference]: Without dead ends: 944 [2023-11-26 11:58:23,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 951 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2023-11-26 11:58:23,148 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 743 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:23,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 1513 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:58:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2023-11-26 11:58:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 916. [2023-11-26 11:58:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 682 states have (on average 1.3900293255131966) internal successors, (948), 682 states have internal predecessors, (948), 207 states have call successors, (207), 26 states have call predecessors, (207), 26 states have return successors, (207), 207 states have call predecessors, (207), 207 states have call successors, (207) [2023-11-26 11:58:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1362 transitions. [2023-11-26 11:58:23,252 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1362 transitions. Word has length 482 [2023-11-26 11:58:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:23,253 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1362 transitions. [2023-11-26 11:58:23,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.5) internal successors, (210), 12 states have internal predecessors, (210), 2 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 2 states have call predecessors, (119), 2 states have call successors, (119) [2023-11-26 11:58:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1362 transitions. [2023-11-26 11:58:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-26 11:58:23,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:23,259 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:23,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:23,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:23,474 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:23,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 429969900, now seen corresponding path program 1 times [2023-11-26 11:58:23,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:23,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431304202] [2023-11-26 11:58:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:23,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:23,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:23,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602705521] [2023-11-26 11:58:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:23,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:23,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:23,553 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:23,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-26 11:58:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:24,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:58:24,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:58:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4748 proven. 96 refuted. 0 times theorem prover too weak. 4540 trivial. 0 not checked. [2023-11-26 11:58:25,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:58:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 108 proven. 96 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-26 11:58:26,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:58:26,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431304202] [2023-11-26 11:58:26,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:58:26,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602705521] [2023-11-26 11:58:26,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602705521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:58:26,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:58:26,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-26 11:58:26,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008933978] [2023-11-26 11:58:26,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:58:26,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:58:26,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:58:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:58:26,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:58:26,081 INFO L87 Difference]: Start difference. First operand 916 states and 1362 transitions. Second operand has 15 states, 15 states have (on average 16.066666666666666) internal successors, (241), 15 states have internal predecessors, (241), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) [2023-11-26 11:58:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:58:28,643 INFO L93 Difference]: Finished difference Result 3560 states and 5212 transitions. [2023-11-26 11:58:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-26 11:58:28,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 16.066666666666666) internal successors, (241), 15 states have internal predecessors, (241), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) Word has length 482 [2023-11-26 11:58:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:58:28,655 INFO L225 Difference]: With dead ends: 3560 [2023-11-26 11:58:28,655 INFO L226 Difference]: Without dead ends: 2792 [2023-11-26 11:58:28,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 949 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2023-11-26 11:58:28,659 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 2238 mSDsluCounter, 2222 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:58:28,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2274 Valid, 2543 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-26 11:58:28,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2023-11-26 11:58:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2530. [2023-11-26 11:58:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2042 states have (on average 1.4187071498530852) internal successors, (2897), 2044 states have internal predecessors, (2897), 417 states have call successors, (417), 70 states have call predecessors, (417), 70 states have return successors, (417), 415 states have call predecessors, (417), 417 states have call successors, (417) [2023-11-26 11:58:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3731 transitions. [2023-11-26 11:58:28,914 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3731 transitions. Word has length 482 [2023-11-26 11:58:28,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:58:28,915 INFO L495 AbstractCegarLoop]: Abstraction has 2530 states and 3731 transitions. [2023-11-26 11:58:28,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.066666666666666) internal successors, (241), 15 states have internal predecessors, (241), 4 states have call successors, (138), 3 states have call predecessors, (138), 5 states have return successors, (138), 4 states have call predecessors, (138), 4 states have call successors, (138) [2023-11-26 11:58:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3731 transitions. [2023-11-26 11:58:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2023-11-26 11:58:28,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:58:28,922 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:58:28,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-26 11:58:29,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:29,133 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:58:29,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:58:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 414451182, now seen corresponding path program 1 times [2023-11-26 11:58:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:58:29,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70335448] [2023-11-26 11:58:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:29,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:58:29,252 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:58:29,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540809139] [2023-11-26 11:58:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:58:29,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:58:29,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:58:29,259 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:58:29,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_778dbd1d-e74d-4a7d-a927-c8e4ff90434d/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-26 11:58:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:58:29,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:58:29,915 INFO L285 TraceCheckSpWp]: Computing forward predicates...