./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.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_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/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_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/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_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/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 cde063dcb13ed313b2f32e49cd3dc75da2c365cf6b52ae59dd9b17042beff0a8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:47:31,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:47:31,357 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:47:31,371 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:47:31,371 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:47:31,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:47:31,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:47:31,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:47:31,420 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:47:31,427 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:47:31,428 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:47:31,428 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:47:31,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:47:31,431 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:47:31,431 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:47:31,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:47:31,432 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:47:31,433 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:47:31,434 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:47:31,434 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:47:31,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:47:31,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:47:31,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:47:31,436 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:47:31,436 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:47:31,437 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:47:31,437 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:47:31,438 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:47:31,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:47:31,439 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:47:31,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:47:31,440 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:31,441 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:47:31,441 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:47:31,441 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:47:31,442 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:47:31,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:47:31,442 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:47:31,442 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:47:31,443 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:47:31,443 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:47:31,443 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:47:31,443 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_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cde063dcb13ed313b2f32e49cd3dc75da2c365cf6b52ae59dd9b17042beff0a8 [2023-11-26 11:47:31,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:47:31,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:47:31,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:47:31,760 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:47:31,761 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:47:31,762 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i [2023-11-26 11:47:35,014 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:47:35,307 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:47:35,308 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i [2023-11-26 11:47:35,324 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/data/dfc5a330d/98fa687826844b1c9b05f4ff0ba251ff/FLAG0804ef9ba [2023-11-26 11:47:35,349 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/data/dfc5a330d/98fa687826844b1c9b05f4ff0ba251ff [2023-11-26 11:47:35,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:47:35,354 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:47:35,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:35,357 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:47:35,363 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:47:35,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:35,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@313fe91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35, skipping insertion in model container [2023-11-26 11:47:35,370 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:35,458 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:47:35,631 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_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i[916,929] [2023-11-26 11:47:35,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:35,878 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:47:35,891 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_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-27.i[916,929] [2023-11-26 11:47:35,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:35,995 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:47:35,996 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35 WrapperNode [2023-11-26 11:47:35,996 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:35,997 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:35,998 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:47:35,998 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:47:36,006 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,041 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,124 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 450 [2023-11-26 11:47:36,124 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:36,125 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:47:36,126 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:47:36,126 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:47:36,137 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,145 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,254 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 11:47:36,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,305 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,339 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:47:36,363 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:47:36,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:47:36,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:47:36,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (1/1) ... [2023-11-26 11:47:36,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:36,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:36,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:47:36,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:47:36,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:47:36,443 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 11:47:36,444 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 11:47:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:47:36,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:47:36,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:47:36,617 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:47:36,620 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:47:37,539 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:47:37,601 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:47:37,601 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 11:47:37,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:37 BoogieIcfgContainer [2023-11-26 11:47:37,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:47:37,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:47:37,605 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:47:37,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:47:37,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:47:35" (1/3) ... [2023-11-26 11:47:37,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4630d358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:37, skipping insertion in model container [2023-11-26 11:47:37,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:35" (2/3) ... [2023-11-26 11:47:37,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4630d358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:37, skipping insertion in model container [2023-11-26 11:47:37,615 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:37" (3/3) ... [2023-11-26 11:47:37,616 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-27.i [2023-11-26 11:47:37,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:47:37,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:47:37,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:37,715 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;@2b8d3c61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:37,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 11:47:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 178 states, 124 states have (on average 1.5483870967741935) internal successors, (192), 125 states have internal predecessors, (192), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 11:47:37,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2023-11-26 11:47:37,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:37,759 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:37,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:37,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:37,766 INFO L85 PathProgramCache]: Analyzing trace with hash 2056512621, now seen corresponding path program 1 times [2023-11-26 11:47:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:37,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668510659] [2023-11-26 11:47:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:37,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:38,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:38,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668510659] [2023-11-26 11:47:38,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 11:47:38,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405937696] [2023-11-26 11:47:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:38,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:38,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:38,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:38,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:38,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 11:47:38,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2023-11-26 11:47:38,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:47:38,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405937696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:38,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:38,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:47:38,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131053369] [2023-11-26 11:47:38,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:38,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:47:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:47:38,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:47:38,801 INFO L87 Difference]: Start difference. First operand has 178 states, 124 states have (on average 1.5483870967741935) internal successors, (192), 125 states have internal predecessors, (192), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-26 11:47:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:38,891 INFO L93 Difference]: Finished difference Result 352 states and 635 transitions. [2023-11-26 11:47:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:47:38,894 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) Word has length 336 [2023-11-26 11:47:38,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:38,914 INFO L225 Difference]: With dead ends: 352 [2023-11-26 11:47:38,914 INFO L226 Difference]: Without dead ends: 175 [2023-11-26 11:47:38,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 335 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 11:47:38,932 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:38,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 11:47:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-26 11:47:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-11-26 11:47:39,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 122 states have (on average 1.5) internal successors, (183), 122 states have internal predecessors, (183), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 11:47:39,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 285 transitions. [2023-11-26 11:47:39,017 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 285 transitions. Word has length 336 [2023-11-26 11:47:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:39,018 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 285 transitions. [2023-11-26 11:47:39,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-26 11:47:39,019 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 285 transitions. [2023-11-26 11:47:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2023-11-26 11:47:39,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:39,029 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:39,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:39,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:39,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:39,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 14812741, now seen corresponding path program 1 times [2023-11-26 11:47:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:39,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809097686] [2023-11-26 11:47:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:39,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:39,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:47:39,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016516647] [2023-11-26 11:47:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:39,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:39,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:39,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:39,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:47:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:39,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:39,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 11:47:40,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:47:40,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:40,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809097686] [2023-11-26 11:47:40,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:47:40,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016516647] [2023-11-26 11:47:40,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016516647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:40,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:40,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-26 11:47:40,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745331690] [2023-11-26 11:47:40,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:40,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 11:47:40,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 11:47:40,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:47:40,510 INFO L87 Difference]: Start difference. First operand 175 states and 285 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 11:47:42,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:42,411 INFO L93 Difference]: Finished difference Result 1044 states and 1712 transitions. [2023-11-26 11:47:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:47:42,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 337 [2023-11-26 11:47:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:42,423 INFO L225 Difference]: With dead ends: 1044 [2023-11-26 11:47:42,423 INFO L226 Difference]: Without dead ends: 870 [2023-11-26 11:47:42,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:47:42,426 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1225 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2620 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:42,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 2620 Invalid, 1257 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [148 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-26 11:47:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-11-26 11:47:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 331. [2023-11-26 11:47:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 226 states have (on average 1.4513274336283186) internal successors, (328), 226 states have internal predecessors, (328), 102 states have call successors, (102), 2 states have call predecessors, (102), 2 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-26 11:47:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 532 transitions. [2023-11-26 11:47:42,524 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 532 transitions. Word has length 337 [2023-11-26 11:47:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:42,526 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 532 transitions. [2023-11-26 11:47:42,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 11:47:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 532 transitions. [2023-11-26 11:47:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2023-11-26 11:47:42,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:42,531 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:42,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:42,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-26 11:47:42,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:42,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1401016135, now seen corresponding path program 1 times [2023-11-26 11:47:42,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:42,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139755360] [2023-11-26 11:47:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:42,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:42,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:47:42,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995527650] [2023-11-26 11:47:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:42,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:42,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:42,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:47:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:43,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 11:47:43,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 11:47:44,139 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:47:44,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:44,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139755360] [2023-11-26 11:47:44,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:47:44,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995527650] [2023-11-26 11:47:44,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995527650] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:44,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:44,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-26 11:47:44,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964329941] [2023-11-26 11:47:44,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:44,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:44,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:44,144 INFO L87 Difference]: Start difference. First operand 331 states and 532 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 11:47:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:45,644 INFO L93 Difference]: Finished difference Result 1551 states and 2487 transitions. [2023-11-26 11:47:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:47:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 337 [2023-11-26 11:47:45,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:45,660 INFO L225 Difference]: With dead ends: 1551 [2023-11-26 11:47:45,661 INFO L226 Difference]: Without dead ends: 1313 [2023-11-26 11:47:45,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:47:45,666 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 1377 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 2409 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:45,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1377 Valid, 2409 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-26 11:47:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2023-11-26 11:47:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 644. [2023-11-26 11:47:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 507 states have (on average 1.5305719921104537) internal successors, (776), 508 states have internal predecessors, (776), 132 states have call successors, (132), 4 states have call predecessors, (132), 4 states have return successors, (132), 131 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-26 11:47:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1040 transitions. [2023-11-26 11:47:45,753 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1040 transitions. Word has length 337 [2023-11-26 11:47:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:45,755 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1040 transitions. [2023-11-26 11:47:45,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 11:47:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1040 transitions. [2023-11-26 11:47:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-11-26 11:47:45,759 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:45,759 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:45,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:45,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-26 11:47:45,967 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:45,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2084803805, now seen corresponding path program 1 times [2023-11-26 11:47:45,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:45,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561129509] [2023-11-26 11:47:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:45,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:46,061 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:47:46,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119238407] [2023-11-26 11:47:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:46,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:46,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:46,063 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:46,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:47:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:46,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:47:46,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 11:47:46,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:47:46,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:46,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561129509] [2023-11-26 11:47:46,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:47:46,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119238407] [2023-11-26 11:47:46,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119238407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:46,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:46,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:47:46,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436076340] [2023-11-26 11:47:46,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:46,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:47:46,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:46,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:47:46,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:46,439 INFO L87 Difference]: Start difference. First operand 644 states and 1040 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 11:47:46,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:46,828 INFO L93 Difference]: Finished difference Result 1626 states and 2605 transitions. [2023-11-26 11:47:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:46,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 338 [2023-11-26 11:47:46,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:46,839 INFO L225 Difference]: With dead ends: 1626 [2023-11-26 11:47:46,839 INFO L226 Difference]: Without dead ends: 983 [2023-11-26 11:47:46,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:47:46,844 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 246 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:46,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 742 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:47:46,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2023-11-26 11:47:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 644. [2023-11-26 11:47:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 507 states have (on average 1.4911242603550297) internal successors, (756), 508 states have internal predecessors, (756), 132 states have call successors, (132), 4 states have call predecessors, (132), 4 states have return successors, (132), 131 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-26 11:47:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1020 transitions. [2023-11-26 11:47:46,939 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1020 transitions. Word has length 338 [2023-11-26 11:47:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:46,940 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 1020 transitions. [2023-11-26 11:47:46,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 11:47:46,941 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1020 transitions. [2023-11-26 11:47:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2023-11-26 11:47:46,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:46,945 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:46,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:47,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:47,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:47,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:47,154 INFO L85 PathProgramCache]: Analyzing trace with hash -385048260, now seen corresponding path program 1 times [2023-11-26 11:47:47,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:47,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309758573] [2023-11-26 11:47:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:47,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:47,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:47:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305217122] [2023-11-26 11:47:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:47,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:47,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:47,230 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:47,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:47:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:47,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:47,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 3155 proven. 192 refuted. 0 times theorem prover too weak. 1753 trivial. 0 not checked. [2023-11-26 11:47:48,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:49,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 102 proven. 195 refuted. 0 times theorem prover too weak. 4803 trivial. 0 not checked. [2023-11-26 11:47:49,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309758573] [2023-11-26 11:47:49,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:47:49,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305217122] [2023-11-26 11:47:49,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305217122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:49,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:47:49,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-26 11:47:49,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248088229] [2023-11-26 11:47:49,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:49,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-26 11:47:49,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-26 11:47:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-11-26 11:47:49,294 INFO L87 Difference]: Start difference. First operand 644 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) [2023-11-26 11:47:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:50,257 INFO L93 Difference]: Finished difference Result 1756 states and 2753 transitions. [2023-11-26 11:47:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:47:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) Word has length 339 [2023-11-26 11:47:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:50,267 INFO L225 Difference]: With dead ends: 1756 [2023-11-26 11:47:50,267 INFO L226 Difference]: Without dead ends: 1113 [2023-11-26 11:47:50,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-11-26 11:47:50,270 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 847 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:50,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 1018 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 11:47:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-11-26 11:47:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1076. [2023-11-26 11:47:50,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 906 states have (on average 1.490066225165563) internal successors, (1350), 910 states have internal predecessors, (1350), 156 states have call successors, (156), 13 states have call predecessors, (156), 13 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-26 11:47:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1662 transitions. [2023-11-26 11:47:50,365 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1662 transitions. Word has length 339 [2023-11-26 11:47:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:50,368 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1662 transitions. [2023-11-26 11:47:50,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 10.5625) internal successors, (169), 16 states have internal predecessors, (169), 5 states have call successors, (92), 3 states have call predecessors, (92), 7 states have return successors, (93), 5 states have call predecessors, (93), 5 states have call successors, (93) [2023-11-26 11:47:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1662 transitions. [2023-11-26 11:47:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-11-26 11:47:50,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:50,375 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:50,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:47:50,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:50,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:50,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -599831490, now seen corresponding path program 1 times [2023-11-26 11:47:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:50,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723095832] [2023-11-26 11:47:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:50,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:47:50,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790294776] [2023-11-26 11:47:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:50,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:50,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:50,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:50,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:47:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:51,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-26 11:47:51,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2810 proven. 207 refuted. 0 times theorem prover too weak. 2083 trivial. 0 not checked. [2023-11-26 11:47:51,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 87 proven. 210 refuted. 0 times theorem prover too weak. 4803 trivial. 0 not checked. [2023-11-26 11:47:52,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:52,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723095832] [2023-11-26 11:47:52,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:47:52,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790294776] [2023-11-26 11:47:52,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790294776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:52,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:47:52,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-26 11:47:52,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738344098] [2023-11-26 11:47:52,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 11:47:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 11:47:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:47:52,287 INFO L87 Difference]: Start difference. First operand 1076 states and 1662 transitions. Second operand has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-26 11:47:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:47:53,137 INFO L93 Difference]: Finished difference Result 2179 states and 3345 transitions. [2023-11-26 11:47:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-26 11:47:53,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) Word has length 340 [2023-11-26 11:47:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:47:53,148 INFO L225 Difference]: With dead ends: 2179 [2023-11-26 11:47:53,149 INFO L226 Difference]: Without dead ends: 1104 [2023-11-26 11:47:53,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 664 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2023-11-26 11:47:53,155 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 442 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:47:53,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 791 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 11:47:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2023-11-26 11:47:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1100. [2023-11-26 11:47:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 924 states have (on average 1.474025974025974) internal successors, (1362), 928 states have internal predecessors, (1362), 156 states have call successors, (156), 19 states have call predecessors, (156), 19 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-26 11:47:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1674 transitions. [2023-11-26 11:47:53,249 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1674 transitions. Word has length 340 [2023-11-26 11:47:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:47:53,251 INFO L495 AbstractCegarLoop]: Abstraction has 1100 states and 1674 transitions. [2023-11-26 11:47:53,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.266666666666667) internal successors, (139), 15 states have internal predecessors, (139), 4 states have call successors, (91), 3 states have call predecessors, (91), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-26 11:47:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1674 transitions. [2023-11-26 11:47:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2023-11-26 11:47:53,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:47:53,257 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:47:53,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:53,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:53,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 11:47:53,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:53,466 INFO L85 PathProgramCache]: Analyzing trace with hash -176184768, now seen corresponding path program 1 times [2023-11-26 11:47:53,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:53,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223730124] [2023-11-26 11:47:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:53,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:53,525 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 11:47:53,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412821295] [2023-11-26 11:47:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:53,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:53,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:53,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:53,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcea4dc0-bbcd-4d31-ab0e-3dc690b86ad1/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:47:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:53,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 11:47:53,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 3978 proven. 297 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2023-11-26 11:47:58,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:48:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 393 proven. 327 refuted. 0 times theorem prover too weak. 4380 trivial. 0 not checked. [2023-11-26 11:48:07,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223730124] [2023-11-26 11:48:07,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 11:48:07,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412821295] [2023-11-26 11:48:07,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412821295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:48:07,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:48:07,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2023-11-26 11:48:07,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606254317] [2023-11-26 11:48:07,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:48:07,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-26 11:48:07,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-26 11:48:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1610, Unknown=0, NotChecked=0, Total=2070 [2023-11-26 11:48:07,308 INFO L87 Difference]: Start difference. First operand 1100 states and 1674 transitions. Second operand has 46 states, 44 states have (on average 4.704545454545454) internal successors, (207), 42 states have internal predecessors, (207), 14 states have call successors, (102), 8 states have call predecessors, (102), 16 states have return successors, (102), 14 states have call predecessors, (102), 14 states have call successors, (102)