./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.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_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/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_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/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_f1dc13df-898d-4ffa-a1e8-644907377030/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 378186c6d9208dcac7e742ba7e3d709cb5ca4759d0a6109e61503d5010b43317 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:53:10,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:53:10,579 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:53:10,584 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:53:10,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:53:10,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:53:10,611 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:53:10,611 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:53:10,612 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:53:10,613 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:53:10,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:53:10,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:53:10,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:53:10,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:53:10,616 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:53:10,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:53:10,617 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:53:10,618 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:53:10,619 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:53:10,619 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:53:10,620 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:53:10,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:53:10,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:53:10,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:53:10,622 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:53:10,623 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:53:10,623 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:53:10,624 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:53:10,625 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:53:10,625 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:53:10,626 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:53:10,626 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:10,627 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:53:10,627 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:53:10,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:53:10,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:53:10,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:53:10,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:53:10,629 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:53:10,629 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:53:10,629 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:53:10,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:53:10,630 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_f1dc13df-898d-4ffa-a1e8-644907377030/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 378186c6d9208dcac7e742ba7e3d709cb5ca4759d0a6109e61503d5010b43317 [2023-11-26 11:53:10,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:53:10,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:53:10,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:53:10,952 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:53:10,953 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:53:10,955 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i [2023-11-26 11:53:14,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:53:14,431 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:53:14,434 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i [2023-11-26 11:53:14,448 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/data/7f4420404/3eab118c102d414bb9a8465e5cefcfcf/FLAGe5b805fee [2023-11-26 11:53:14,468 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/data/7f4420404/3eab118c102d414bb9a8465e5cefcfcf [2023-11-26 11:53:14,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:53:14,478 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:53:14,480 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:14,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:53:14,487 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:53:14,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:14,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43385c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14, skipping insertion in model container [2023-11-26 11:53:14,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:14,526 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:53:14,692 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_f1dc13df-898d-4ffa-a1e8-644907377030/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i[917,930] [2023-11-26 11:53:14,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:14,777 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:53:14,788 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_f1dc13df-898d-4ffa-a1e8-644907377030/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-sp_file-18.i[917,930] [2023-11-26 11:53:14,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:53:14,847 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:53:14,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14 WrapperNode [2023-11-26 11:53:14,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:53:14,849 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:14,849 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:53:14,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:53:14,857 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:14,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:14,936 INFO L138 Inliner]: procedures = 29, calls = 139, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 431 [2023-11-26 11:53:14,937 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:53:14,938 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:53:14,938 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:53:14,938 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:53:14,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:14,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:14,958 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:14,985 INFO L175 MemorySlicer]: Split 115 memory accesses to 2 slices as follows [2, 113]. 98 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 10]. The 13 writes are split as follows [0, 13]. [2023-11-26 11:53:14,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:14,986 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:15,037 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:15,042 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:15,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:15,057 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:15,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:53:15,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:53:15,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:53:15,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:53:15,076 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (1/1) ... [2023-11-26 11:53:15,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:53:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:15,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:53:15,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:53:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:53:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-26 11:53:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-26 11:53:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:53:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:53:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-26 11:53:15,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-26 11:53:15,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:53:15,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:53:15,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-26 11:53:15,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-26 11:53:15,186 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:53:15,186 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:53:15,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:53:15,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:53:15,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:53:15,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:53:15,329 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:53:15,332 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:53:16,046 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:53:16,088 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:53:16,088 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:53:16,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:16 BoogieIcfgContainer [2023-11-26 11:53:16,089 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:53:16,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:53:16,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:53:16,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:53:16,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:53:14" (1/3) ... [2023-11-26 11:53:16,099 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516f0d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:16, skipping insertion in model container [2023-11-26 11:53:16,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:53:14" (2/3) ... [2023-11-26 11:53:16,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516f0d54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:53:16, skipping insertion in model container [2023-11-26 11:53:16,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:53:16" (3/3) ... [2023-11-26 11:53:16,102 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-sp_file-18.i [2023-11-26 11:53:16,119 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:53:16,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:53:16,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:53:16,174 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;@21f797f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:53:16,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:53:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 82 states have (on average 1.524390243902439) internal successors, (125), 83 states have internal predecessors, (125), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-26 11:53:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-26 11:53:16,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:16,198 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:16,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:16,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash 363266214, now seen corresponding path program 1 times [2023-11-26 11:53:16,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:16,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366116348] [2023-11-26 11:53:16,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:16,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:16,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366116348] [2023-11-26 11:53:16,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:53:16,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870361119] [2023-11-26 11:53:16,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:16,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:16,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:16,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:16,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:53:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:16,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:53:16,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-11-26 11:53:16,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:16,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870361119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:16,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:16,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:53:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212096622] [2023-11-26 11:53:16,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:16,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:53:16,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:53:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:53:16,976 INFO L87 Difference]: Start difference. First operand has 97 states, 82 states have (on average 1.524390243902439) internal successors, (125), 83 states have internal predecessors, (125), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 11:53:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:17,032 INFO L93 Difference]: Finished difference Result 191 states and 308 transitions. [2023-11-26 11:53:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:53:17,035 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 102 [2023-11-26 11:53:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:17,047 INFO L225 Difference]: With dead ends: 191 [2023-11-26 11:53:17,047 INFO L226 Difference]: Without dead ends: 95 [2023-11-26 11:53:17,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 101 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 11:53:17,058 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:17,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 140 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:53:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-26 11:53:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-26 11:53:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 81 states have internal predecessors, (120), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-26 11:53:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 144 transitions. [2023-11-26 11:53:17,134 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 144 transitions. Word has length 102 [2023-11-26 11:53:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:17,134 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 144 transitions. [2023-11-26 11:53:17,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 11:53:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 144 transitions. [2023-11-26 11:53:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-26 11:53:17,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:17,140 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:17,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:17,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:17,344 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:17,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 446788178, now seen corresponding path program 1 times [2023-11-26 11:53:17,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378097942] [2023-11-26 11:53:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:17,441 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269384415] [2023-11-26 11:53:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:17,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:17,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:17,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:17,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:53:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:17,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:53:17,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:17,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:53:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:53:17,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:17,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378097942] [2023-11-26 11:53:17,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:17,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269384415] [2023-11-26 11:53:17,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269384415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:17,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:17,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:53:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411659173] [2023-11-26 11:53:17,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:17,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:53:17,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:53:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:53:17,838 INFO L87 Difference]: Start difference. First operand 95 states and 144 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:17,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:17,926 INFO L93 Difference]: Finished difference Result 215 states and 327 transitions. [2023-11-26 11:53:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:17,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 102 [2023-11-26 11:53:17,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:17,931 INFO L225 Difference]: With dead ends: 215 [2023-11-26 11:53:17,931 INFO L226 Difference]: Without dead ends: 121 [2023-11-26 11:53:17,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 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 11:53:17,935 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 88 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:17,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 395 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:53:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-26 11:53:17,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2023-11-26 11:53:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-26 11:53:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 145 transitions. [2023-11-26 11:53:17,952 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 145 transitions. Word has length 102 [2023-11-26 11:53:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:17,955 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 145 transitions. [2023-11-26 11:53:17,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 145 transitions. [2023-11-26 11:53:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-26 11:53:17,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:17,959 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:17,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:18,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 11:53:18,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1147852756, now seen corresponding path program 1 times [2023-11-26 11:53:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:18,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397956321] [2023-11-26 11:53:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:18,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:18,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402295764] [2023-11-26 11:53:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:18,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:18,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:18,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:18,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:53:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:18,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-26 11:53:18,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:18,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:53:18,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:53:19,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:53:19,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:53:19,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:53:19,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:53:20,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:53:20,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:20,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:53:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-26 11:53:20,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:20,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:20,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397956321] [2023-11-26 11:53:20,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:20,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402295764] [2023-11-26 11:53:20,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402295764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:20,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:53:20,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2023-11-26 11:53:20,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620666145] [2023-11-26 11:53:20,439 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:20,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:53:20,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:53:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:53:20,443 INFO L87 Difference]: Start difference. First operand 96 states and 145 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 11:53:24,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-26 11:53:28,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-26 11:53:32,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-26 11:53:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:32,998 INFO L93 Difference]: Finished difference Result 286 states and 433 transitions. [2023-11-26 11:53:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:53:32,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 102 [2023-11-26 11:53:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:33,002 INFO L225 Difference]: With dead ends: 286 [2023-11-26 11:53:33,002 INFO L226 Difference]: Without dead ends: 191 [2023-11-26 11:53:33,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:53:33,004 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 188 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:33,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 460 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 3 Unknown, 0 Unchecked, 12.5s Time] [2023-11-26 11:53:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-26 11:53:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2023-11-26 11:53:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.4713375796178343) internal successors, (231), 157 states have internal predecessors, (231), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-26 11:53:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 279 transitions. [2023-11-26 11:53:33,033 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 279 transitions. Word has length 102 [2023-11-26 11:53:33,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:33,034 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 279 transitions. [2023-11-26 11:53:33,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 11:53:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 279 transitions. [2023-11-26 11:53:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-26 11:53:33,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:33,037 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:33,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:53:33,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:33,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:33,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:33,250 INFO L85 PathProgramCache]: Analyzing trace with hash 418302234, now seen corresponding path program 1 times [2023-11-26 11:53:33,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:33,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984429967] [2023-11-26 11:53:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:33,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:33,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:33,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138781265] [2023-11-26 11:53:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:33,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:33,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:33,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:33,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:53:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:33,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 11:53:33,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:33,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:53:33,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2023-11-26 11:53:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:53:33,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:33,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:33,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984429967] [2023-11-26 11:53:33,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:33,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138781265] [2023-11-26 11:53:33,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138781265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:33,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:33,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:53:33,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588758451] [2023-11-26 11:53:33,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:33,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:53:33,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:33,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:53:33,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:53:33,629 INFO L87 Difference]: Start difference. First operand 184 states and 279 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:33,890 INFO L93 Difference]: Finished difference Result 378 states and 573 transitions. [2023-11-26 11:53:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:53:33,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 103 [2023-11-26 11:53:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:33,893 INFO L225 Difference]: With dead ends: 378 [2023-11-26 11:53:33,893 INFO L226 Difference]: Without dead ends: 195 [2023-11-26 11:53:33,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:53:33,896 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 23 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:33,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 479 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:53:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-26 11:53:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 188. [2023-11-26 11:53:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 161 states have (on average 1.4658385093167703) internal successors, (236), 161 states have internal predecessors, (236), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-26 11:53:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 284 transitions. [2023-11-26 11:53:33,922 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 284 transitions. Word has length 103 [2023-11-26 11:53:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:33,923 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 284 transitions. [2023-11-26 11:53:33,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 284 transitions. [2023-11-26 11:53:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-26 11:53:33,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:33,925 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:33,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:34,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:34,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:34,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2006650136, now seen corresponding path program 1 times [2023-11-26 11:53:34,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:34,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916426287] [2023-11-26 11:53:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:34,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:34,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445681279] [2023-11-26 11:53:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:34,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:34,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:53:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:34,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 11:53:34,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:53:34,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:34,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:34,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916426287] [2023-11-26 11:53:34,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:34,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445681279] [2023-11-26 11:53:34,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445681279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:34,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:34,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:53:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182863258] [2023-11-26 11:53:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:34,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:53:34,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:53:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:53:34,471 INFO L87 Difference]: Start difference. First operand 188 states and 284 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:34,638 INFO L93 Difference]: Finished difference Result 380 states and 574 transitions. [2023-11-26 11:53:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:53:34,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 103 [2023-11-26 11:53:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:34,642 INFO L225 Difference]: With dead ends: 380 [2023-11-26 11:53:34,642 INFO L226 Difference]: Without dead ends: 193 [2023-11-26 11:53:34,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:53:34,643 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 11 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:34,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 310 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:53:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-26 11:53:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2023-11-26 11:53:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 163 states have (on average 1.4478527607361964) internal successors, (236), 163 states have internal predecessors, (236), 24 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-26 11:53:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 284 transitions. [2023-11-26 11:53:34,686 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 284 transitions. Word has length 103 [2023-11-26 11:53:34,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:34,686 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 284 transitions. [2023-11-26 11:53:34,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 284 transitions. [2023-11-26 11:53:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-26 11:53:34,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:34,688 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:34,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:34,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:34,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:34,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 91545795, now seen corresponding path program 1 times [2023-11-26 11:53:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:34,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434088267] [2023-11-26 11:53:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:34,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:34,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996808036] [2023-11-26 11:53:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:34,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:34,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:34,969 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:34,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:53:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:35,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-26 11:53:35,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:35,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:53:35,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-26 11:53:36,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-26 11:53:36,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-26 11:53:37,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-26 11:53:37,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-26 11:53:38,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-26 11:53:38,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:38,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-26 11:53:39,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:39,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-11-26 11:53:39,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:39,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:39,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:39,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2023-11-26 11:53:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:39,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:39,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 11:53:39,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 29 [2023-11-26 11:53:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 9 proven. 107 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-26 11:53:39,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:53:40,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434088267] [2023-11-26 11:53:40,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:40,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996808036] [2023-11-26 11:53:40,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996808036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:53:40,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:53:40,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-11-26 11:53:40,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014269877] [2023-11-26 11:53:40,258 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:53:40,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:53:40,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:53:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:53:40,261 INFO L87 Difference]: Start difference. First operand 190 states and 284 transitions. Second operand has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-26 11:53:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:42,620 INFO L93 Difference]: Finished difference Result 589 states and 877 transitions. [2023-11-26 11:53:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-26 11:53:42,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 103 [2023-11-26 11:53:42,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:42,627 INFO L225 Difference]: With dead ends: 589 [2023-11-26 11:53:42,627 INFO L226 Difference]: Without dead ends: 400 [2023-11-26 11:53:42,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2023-11-26 11:53:42,630 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 508 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:42,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 613 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-26 11:53:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-26 11:53:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 236. [2023-11-26 11:53:42,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 207 states have (on average 1.4251207729468598) internal successors, (295), 207 states have internal predecessors, (295), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-26 11:53:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 343 transitions. [2023-11-26 11:53:42,670 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 343 transitions. Word has length 103 [2023-11-26 11:53:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:42,671 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 343 transitions. [2023-11-26 11:53:42,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2023-11-26 11:53:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 343 transitions. [2023-11-26 11:53:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-26 11:53:42,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:42,674 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:42,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:42,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:42,885 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:42,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:42,886 INFO L85 PathProgramCache]: Analyzing trace with hash -147362044, now seen corresponding path program 1 times [2023-11-26 11:53:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:42,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193948164] [2023-11-26 11:53:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:42,931 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:42,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56028582] [2023-11-26 11:53:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:42,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:42,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:42,934 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:42,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:53:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:43,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 11:53:43,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:53:43,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:43,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:43,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193948164] [2023-11-26 11:53:43,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:43,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56028582] [2023-11-26 11:53:43,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56028582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:43,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:43,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:53:43,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081315071] [2023-11-26 11:53:43,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:43,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:53:43,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:43,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:53:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:53:43,266 INFO L87 Difference]: Start difference. First operand 236 states and 343 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:47,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-26 11:53:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:53:47,635 INFO L93 Difference]: Finished difference Result 525 states and 769 transitions. [2023-11-26 11:53:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:53:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 104 [2023-11-26 11:53:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:53:47,639 INFO L225 Difference]: With dead ends: 525 [2023-11-26 11:53:47,640 INFO L226 Difference]: Without dead ends: 290 [2023-11-26 11:53:47,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:53:47,642 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 83 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:53:47,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 364 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-11-26 11:53:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-26 11:53:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 240. [2023-11-26 11:53:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 211 states have (on average 1.4170616113744077) internal successors, (299), 211 states have internal predecessors, (299), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-26 11:53:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 347 transitions. [2023-11-26 11:53:47,674 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 347 transitions. Word has length 104 [2023-11-26 11:53:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:53:47,675 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 347 transitions. [2023-11-26 11:53:47,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 347 transitions. [2023-11-26 11:53:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-26 11:53:47,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:53:47,678 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:53:47,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:53:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:47,886 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:53:47,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:53:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash 312027452, now seen corresponding path program 1 times [2023-11-26 11:53:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:53:47,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509003802] [2023-11-26 11:53:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:47,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:53:47,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:53:47,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536742820] [2023-11-26 11:53:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:53:47,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:53:47,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:53:47,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:53:47,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:53:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:53:48,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:53:48,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:53:49,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:53:49,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-26 11:53:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:53:49,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-26 11:53:49,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-26 11:53:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:53:49,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:53:49,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:53:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509003802] [2023-11-26 11:53:49,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:53:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536742820] [2023-11-26 11:53:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536742820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:53:49,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:53:49,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:53:49,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604588046] [2023-11-26 11:53:49,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:53:49,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:53:49,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:53:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:53:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:53:49,864 INFO L87 Difference]: Start difference. First operand 240 states and 347 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:53:54,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-26 11:53:58,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-26 11:54:02,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-26 11:54:06,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-26 11:54:06,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:06,512 INFO L93 Difference]: Finished difference Result 463 states and 676 transitions. [2023-11-26 11:54:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:54:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 105 [2023-11-26 11:54:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:06,521 INFO L225 Difference]: With dead ends: 463 [2023-11-26 11:54:06,521 INFO L226 Difference]: Without dead ends: 338 [2023-11-26 11:54:06,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:54:06,522 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 286 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:06,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 431 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 334 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2023-11-26 11:54:06,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-26 11:54:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 256. [2023-11-26 11:54:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 227 states have (on average 1.4140969162995596) internal successors, (321), 227 states have internal predecessors, (321), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-26 11:54:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 369 transitions. [2023-11-26 11:54:06,550 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 369 transitions. Word has length 105 [2023-11-26 11:54:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:06,552 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 369 transitions. [2023-11-26 11:54:06,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:54:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 369 transitions. [2023-11-26 11:54:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-26 11:54:06,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:06,555 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:06,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:06,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:06,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2134962703, now seen corresponding path program 1 times [2023-11-26 11:54:06,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:06,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506019311] [2023-11-26 11:54:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:06,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:06,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:06,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332547006] [2023-11-26 11:54:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:06,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:06,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:06,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:06,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:54:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:07,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 11:54:07,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:54:07,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:07,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:07,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506019311] [2023-11-26 11:54:07,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:54:07,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332547006] [2023-11-26 11:54:07,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332547006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:07,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:07,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 11:54:07,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364417829] [2023-11-26 11:54:07,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:07,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:54:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:54:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:54:07,063 INFO L87 Difference]: Start difference. First operand 256 states and 369 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:54:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:07,147 INFO L93 Difference]: Finished difference Result 551 states and 797 transitions. [2023-11-26 11:54:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:54:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 105 [2023-11-26 11:54:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:07,151 INFO L225 Difference]: With dead ends: 551 [2023-11-26 11:54:07,151 INFO L226 Difference]: Without dead ends: 296 [2023-11-26 11:54:07,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:54:07,153 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 72 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:07,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 561 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:54:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-11-26 11:54:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 262. [2023-11-26 11:54:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 233 states have (on average 1.4034334763948497) internal successors, (327), 233 states have internal predecessors, (327), 24 states have call successors, (24), 4 states have call predecessors, (24), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-26 11:54:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 375 transitions. [2023-11-26 11:54:07,203 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 375 transitions. Word has length 105 [2023-11-26 11:54:07,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:07,207 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 375 transitions. [2023-11-26 11:54:07,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:54:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 375 transitions. [2023-11-26 11:54:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-26 11:54:07,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:07,209 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:07,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:07,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 11:54:07,422 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:07,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:07,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1658561067, now seen corresponding path program 1 times [2023-11-26 11:54:07,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:07,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700607135] [2023-11-26 11:54:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:07,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:07,453 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:07,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537444026] [2023-11-26 11:54:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:07,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:07,455 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:07,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:54:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:07,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-26 11:54:07,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:07,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:54:08,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:54:08,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:54:08,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:54:08,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:54:08,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:54:09,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:54:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:54:09,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-26 11:54:09,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:54:09,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-26 11:54:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-26 11:54:09,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:54:10,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700607135] [2023-11-26 11:54:10,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:54:10,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537444026] [2023-11-26 11:54:10,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537444026] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:54:10,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:54:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-26 11:54:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349152528] [2023-11-26 11:54:10,180 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 11:54:10,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:54:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:54:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-26 11:54:10,184 INFO L87 Difference]: Start difference. First operand 262 states and 375 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 11:54:11,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:11,259 INFO L93 Difference]: Finished difference Result 742 states and 1064 transitions. [2023-11-26 11:54:11,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:54:11,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 105 [2023-11-26 11:54:11,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:11,264 INFO L225 Difference]: With dead ends: 742 [2023-11-26 11:54:11,264 INFO L226 Difference]: Without dead ends: 481 [2023-11-26 11:54:11,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2023-11-26 11:54:11,267 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 307 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:11,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 852 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-26 11:54:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-11-26 11:54:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 473. [2023-11-26 11:54:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 416 states have (on average 1.3990384615384615) internal successors, (582), 416 states have internal predecessors, (582), 48 states have call successors, (48), 8 states have call predecessors, (48), 8 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-26 11:54:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 678 transitions. [2023-11-26 11:54:11,324 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 678 transitions. Word has length 105 [2023-11-26 11:54:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:11,324 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 678 transitions. [2023-11-26 11:54:11,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-26 11:54:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 678 transitions. [2023-11-26 11:54:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-26 11:54:11,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:11,327 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:11,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:54:11,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:54:11,536 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:11,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1615337875, now seen corresponding path program 1 times [2023-11-26 11:54:11,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:11,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144817026] [2023-11-26 11:54:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:11,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:11,568 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:11,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725967165] [2023-11-26 11:54:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:11,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:11,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:11,570 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:11,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:54:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:11,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:54:11,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:11,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:54:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-26 11:54:11,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:54:11,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:54:11,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144817026] [2023-11-26 11:54:11,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:54:11,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725967165] [2023-11-26 11:54:11,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725967165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:54:11,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:54:11,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:54:11,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674979926] [2023-11-26 11:54:11,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:54:11,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:54:11,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:54:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:54:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:54:11,884 INFO L87 Difference]: Start difference. First operand 473 states and 678 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:54:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:54:11,988 INFO L93 Difference]: Finished difference Result 725 states and 1041 transitions. [2023-11-26 11:54:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:54:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 105 [2023-11-26 11:54:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:54:11,993 INFO L225 Difference]: With dead ends: 725 [2023-11-26 11:54:11,993 INFO L226 Difference]: Without dead ends: 471 [2023-11-26 11:54:11,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 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 11:54:11,995 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 10 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:54:11,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 392 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:54:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-26 11:54:12,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2023-11-26 11:54:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 414 states have (on average 1.391304347826087) internal successors, (576), 414 states have internal predecessors, (576), 48 states have call successors, (48), 8 states have call predecessors, (48), 8 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-26 11:54:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 672 transitions. [2023-11-26 11:54:12,065 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 672 transitions. Word has length 105 [2023-11-26 11:54:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:54:12,066 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 672 transitions. [2023-11-26 11:54:12,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-26 11:54:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 672 transitions. [2023-11-26 11:54:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-26 11:54:12,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:54:12,068 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:12,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-26 11:54:12,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:54:12,276 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:54:12,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:54:12,277 INFO L85 PathProgramCache]: Analyzing trace with hash 170502868, now seen corresponding path program 1 times [2023-11-26 11:54:12,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:54:12,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462141375] [2023-11-26 11:54:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:12,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:54:12,320 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:54:12,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247921373] [2023-11-26 11:54:12,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:54:12,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:54:12,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:54:12,322 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:54:12,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dc13df-898d-4ffa-a1e8-644907377030/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-26 11:54:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:54:12,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-26 11:54:12,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:54:12,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1