./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya --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 710670ca346a21719bd0508939f664ba04d58832b1c8a269a31e5aa376b94261 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:14:11,496 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:14:11,562 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:14:11,567 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:14:11,567 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:14:11,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:14:11,596 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:14:11,596 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:14:11,597 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:14:11,598 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:14:11,598 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:14:11,599 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:14:11,600 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:14:11,600 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:14:11,601 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:14:11,602 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:14:11,602 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:14:11,603 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:14:11,603 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:14:11,604 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:14:11,605 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:14:11,605 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:14:11,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:14:11,606 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:14:11,607 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:14:11,607 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:14:11,608 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:14:11,608 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:14:11,609 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:14:11,609 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:14:11,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:14:11,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:14:11,611 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:14:11,611 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:14:11,611 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:14:11,611 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:14:11,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:14:11,612 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:14:11,612 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:14:11,612 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:14:11,612 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:14:11,613 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:14:11,613 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_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 710670ca346a21719bd0508939f664ba04d58832b1c8a269a31e5aa376b94261 [2023-11-29 05:14:11,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:14:11,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:14:11,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:14:11,882 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:14:11,882 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:14:11,884 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i [2023-11-29 05:14:14,721 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:14:15,001 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:14:15,002 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i [2023-11-29 05:14:15,015 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/data/8c9922b84/ee3ac2c9bb3944c9ac57dff60c10bc8e/FLAG45eacec3d [2023-11-29 05:14:15,029 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/data/8c9922b84/ee3ac2c9bb3944c9ac57dff60c10bc8e [2023-11-29 05:14:15,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:14:15,034 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:14:15,036 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:14:15,036 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:14:15,042 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:14:15,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f0d960a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15, skipping insertion in model container [2023-11-29 05:14:15,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,098 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:14:15,228 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_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i[916,929] [2023-11-29 05:14:15,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:14:15,371 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:14:15,384 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_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-10.i[916,929] [2023-11-29 05:14:15,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:14:15,470 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:14:15,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15 WrapperNode [2023-11-29 05:14:15,471 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:14:15,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:14:15,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:14:15,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:14:15,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,500 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,560 INFO L138 Inliner]: procedures = 26, calls = 85, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 487 [2023-11-29 05:14:15,560 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:14:15,561 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:14:15,561 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:14:15,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:14:15,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,579 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,607 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]. [2023-11-29 05:14:15,607 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,608 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,626 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,645 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:14:15,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:14:15,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:14:15,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:14:15,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (1/1) ... [2023-11-29 05:14:15,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:14:15,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:15,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:14:15,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:14:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:14:15,721 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 05:14:15,722 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 05:14:15,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:14:15,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:14:15,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:14:15,827 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:14:15,829 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:14:16,496 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:14:16,533 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:14:16,533 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:14:16,534 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:14:16 BoogieIcfgContainer [2023-11-29 05:14:16,534 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:14:16,536 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:14:16,536 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:14:16,539 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:14:16,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:14:15" (1/3) ... [2023-11-29 05:14:16,539 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e97344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:14:16, skipping insertion in model container [2023-11-29 05:14:16,539 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:14:15" (2/3) ... [2023-11-29 05:14:16,540 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e97344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:14:16, skipping insertion in model container [2023-11-29 05:14:16,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:14:16" (3/3) ... [2023-11-29 05:14:16,541 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-10.i [2023-11-29 05:14:16,555 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:14:16,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:14:16,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:14:16,610 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;@157d6d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:14:16,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:14:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 133 states have (on average 1.5639097744360901) internal successors, (208), 134 states have internal predecessors, (208), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-29 05:14:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-29 05:14:16,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:16,642 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:16,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:16,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:16,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1408668724, now seen corresponding path program 1 times [2023-11-29 05:14:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:16,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297820060] [2023-11-29 05:14:16,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:16,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:16,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:16,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820948844] [2023-11-29 05:14:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:16,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:16,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:16,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:14:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:17,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:14:17,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:14:17,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:14:17,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:17,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297820060] [2023-11-29 05:14:17,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:17,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820948844] [2023-11-29 05:14:17,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820948844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:14:17,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:14:17,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:14:17,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712940338] [2023-11-29 05:14:17,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:17,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:14:17,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:14:17,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:14:17,415 INFO L87 Difference]: Start difference. First operand has 208 states, 133 states have (on average 1.5639097744360901) internal successors, (208), 134 states have internal predecessors, (208), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:17,537 INFO L93 Difference]: Finished difference Result 529 states and 1003 transitions. [2023-11-29 05:14:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:14:17,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 450 [2023-11-29 05:14:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:17,555 INFO L225 Difference]: With dead ends: 529 [2023-11-29 05:14:17,556 INFO L226 Difference]: Without dead ends: 322 [2023-11-29 05:14:17,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:14:17,566 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 189 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:17,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 668 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:14:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-29 05:14:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2023-11-29 05:14:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 214 states have (on average 1.5560747663551402) internal successors, (333), 215 states have internal predecessors, (333), 102 states have call successors, (102), 2 states have call predecessors, (102), 2 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-29 05:14:17,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 537 transitions. [2023-11-29 05:14:17,668 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 537 transitions. Word has length 450 [2023-11-29 05:14:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:17,670 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 537 transitions. [2023-11-29 05:14:17,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:17,671 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 537 transitions. [2023-11-29 05:14:17,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 05:14:17,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:17,685 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:17,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:14:17,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 05:14:17,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:17,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1401087158, now seen corresponding path program 1 times [2023-11-29 05:14:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114964859] [2023-11-29 05:14:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:17,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:17,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024976515] [2023-11-29 05:14:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:17,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:17,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:18,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:14:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:18,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:14:18,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:14:18,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:14:18,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114964859] [2023-11-29 05:14:18,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:18,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024976515] [2023-11-29 05:14:18,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024976515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:14:18,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:14:18,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:14:18,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337681560] [2023-11-29 05:14:18,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:18,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:14:18,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:18,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:14:18,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:14:18,402 INFO L87 Difference]: Start difference. First operand 319 states and 537 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:18,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:18,494 INFO L93 Difference]: Finished difference Result 867 states and 1457 transitions. [2023-11-29 05:14:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:14:18,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 451 [2023-11-29 05:14:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:18,504 INFO L225 Difference]: With dead ends: 867 [2023-11-29 05:14:18,504 INFO L226 Difference]: Without dead ends: 549 [2023-11-29 05:14:18,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:14:18,508 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 204 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:18,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 766 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:14:18,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2023-11-29 05:14:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 546. [2023-11-29 05:14:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 371 states have (on average 1.5471698113207548) internal successors, (574), 374 states have internal predecessors, (574), 170 states have call successors, (170), 4 states have call predecessors, (170), 4 states have return successors, (170), 167 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-29 05:14:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 914 transitions. [2023-11-29 05:14:18,586 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 914 transitions. Word has length 451 [2023-11-29 05:14:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:18,588 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 914 transitions. [2023-11-29 05:14:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 914 transitions. [2023-11-29 05:14:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 05:14:18,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:18,594 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:18,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:14:18,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:18,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:18,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1507676744, now seen corresponding path program 1 times [2023-11-29 05:14:18,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:18,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9693957] [2023-11-29 05:14:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:18,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:18,873 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97862673] [2023-11-29 05:14:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:18,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:18,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:18,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:18,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:14:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:19,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:14:19,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4631 proven. 141 refuted. 0 times theorem prover too weak. 5452 trivial. 0 not checked. [2023-11-29 05:14:19,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:14:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 72 proven. 141 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 05:14:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9693957] [2023-11-29 05:14:20,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97862673] [2023-11-29 05:14:20,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97862673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:14:20,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:14:20,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 05:14:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456391252] [2023-11-29 05:14:20,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:14:20,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:14:20,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:14:20,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:14:20,521 INFO L87 Difference]: Start difference. First operand 546 states and 914 transitions. Second operand has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-11-29 05:14:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:22,458 INFO L93 Difference]: Finished difference Result 2120 states and 3461 transitions. [2023-11-29 05:14:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 05:14:22,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) Word has length 451 [2023-11-29 05:14:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:22,471 INFO L225 Difference]: With dead ends: 2120 [2023-11-29 05:14:22,471 INFO L226 Difference]: Without dead ends: 1575 [2023-11-29 05:14:22,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:14:22,475 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1009 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:22,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1407 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 05:14:22,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2023-11-29 05:14:22,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1068. [2023-11-29 05:14:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 749 states have (on average 1.526034712950601) internal successors, (1143), 756 states have internal predecessors, (1143), 294 states have call successors, (294), 24 states have call predecessors, (294), 24 states have return successors, (294), 287 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-29 05:14:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1731 transitions. [2023-11-29 05:14:22,590 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1731 transitions. Word has length 451 [2023-11-29 05:14:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:22,591 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1731 transitions. [2023-11-29 05:14:22,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.071428571428571) internal successors, (141), 14 states have internal predecessors, (141), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-11-29 05:14:22,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1731 transitions. [2023-11-29 05:14:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 05:14:22,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:22,597 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:22,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:14:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:22,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:22,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash 126676409, now seen corresponding path program 1 times [2023-11-29 05:14:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:22,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482045909] [2023-11-29 05:14:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:22,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:22,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180292094] [2023-11-29 05:14:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:22,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:22,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:22,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:22,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:14:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:23,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:14:23,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:14:23,290 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:14:23,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:23,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482045909] [2023-11-29 05:14:23,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:23,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180292094] [2023-11-29 05:14:23,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180292094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:14:23,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:14:23,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:14:23,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458818326] [2023-11-29 05:14:23,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:23,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:14:23,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:14:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:14:23,295 INFO L87 Difference]: Start difference. First operand 1068 states and 1731 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:23,524 INFO L93 Difference]: Finished difference Result 2502 states and 3995 transitions. [2023-11-29 05:14:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:14:23,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 452 [2023-11-29 05:14:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:23,536 INFO L225 Difference]: With dead ends: 2502 [2023-11-29 05:14:23,536 INFO L226 Difference]: Without dead ends: 1435 [2023-11-29 05:14:23,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:14:23,540 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 145 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:23,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 989 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:14:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2023-11-29 05:14:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1184. [2023-11-29 05:14:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 849 states have (on average 1.5111896348645466) internal successors, (1283), 857 states have internal predecessors, (1283), 302 states have call successors, (302), 32 states have call predecessors, (302), 32 states have return successors, (302), 294 states have call predecessors, (302), 302 states have call successors, (302) [2023-11-29 05:14:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1887 transitions. [2023-11-29 05:14:23,634 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1887 transitions. Word has length 452 [2023-11-29 05:14:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:23,636 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1887 transitions. [2023-11-29 05:14:23,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1887 transitions. [2023-11-29 05:14:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 05:14:23,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:23,641 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:23,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 05:14:23,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:23,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:23,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -682670217, now seen corresponding path program 1 times [2023-11-29 05:14:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:23,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204752908] [2023-11-29 05:14:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:23,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:23,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131002908] [2023-11-29 05:14:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:23,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:23,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:23,902 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:23,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:14:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:24,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:14:24,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2103 proven. 189 refuted. 0 times theorem prover too weak. 7932 trivial. 0 not checked. [2023-11-29 05:14:24,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:14:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 24 proven. 189 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 05:14:25,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:25,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204752908] [2023-11-29 05:14:25,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:25,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131002908] [2023-11-29 05:14:25,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131002908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:14:25,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:14:25,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:14:25,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156139921] [2023-11-29 05:14:25,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:14:25,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:14:25,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:25,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:14:25,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:14:25,116 INFO L87 Difference]: Start difference. First operand 1184 states and 1887 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 05:14:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:25,543 INFO L93 Difference]: Finished difference Result 2435 states and 3825 transitions. [2023-11-29 05:14:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:14:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 452 [2023-11-29 05:14:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:25,552 INFO L225 Difference]: With dead ends: 2435 [2023-11-29 05:14:25,552 INFO L226 Difference]: Without dead ends: 1256 [2023-11-29 05:14:25,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 896 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:14:25,556 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 245 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:25,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 641 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:14:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2023-11-29 05:14:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1208. [2023-11-29 05:14:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 865 states have (on average 1.4832369942196533) internal successors, (1283), 873 states have internal predecessors, (1283), 302 states have call successors, (302), 40 states have call predecessors, (302), 40 states have return successors, (302), 294 states have call predecessors, (302), 302 states have call successors, (302) [2023-11-29 05:14:25,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1887 transitions. [2023-11-29 05:14:25,666 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1887 transitions. Word has length 452 [2023-11-29 05:14:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:25,667 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1887 transitions. [2023-11-29 05:14:25,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 05:14:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1887 transitions. [2023-11-29 05:14:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 05:14:25,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:25,673 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:25,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:14:25,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:25,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:25,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:25,874 INFO L85 PathProgramCache]: Analyzing trace with hash 643829433, now seen corresponding path program 1 times [2023-11-29 05:14:25,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:25,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674002341] [2023-11-29 05:14:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:25,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:25,928 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:25,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352511611] [2023-11-29 05:14:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:25,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:25,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:25,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:25,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:14:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:26,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:14:26,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:14:26,237 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:14:26,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:26,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674002341] [2023-11-29 05:14:26,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:26,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352511611] [2023-11-29 05:14:26,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352511611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:14:26,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:14:26,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:14:26,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479705349] [2023-11-29 05:14:26,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:26,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:14:26,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:14:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:14:26,240 INFO L87 Difference]: Start difference. First operand 1208 states and 1887 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:26,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:26,464 INFO L93 Difference]: Finished difference Result 3454 states and 5395 transitions. [2023-11-29 05:14:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:14:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 452 [2023-11-29 05:14:26,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:26,482 INFO L225 Difference]: With dead ends: 3454 [2023-11-29 05:14:26,482 INFO L226 Difference]: Without dead ends: 2259 [2023-11-29 05:14:26,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:14:26,487 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 330 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:26,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 672 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:14:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2023-11-29 05:14:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1279. [2023-11-29 05:14:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 909 states have (on average 1.4675467546754675) internal successors, (1334), 918 states have internal predecessors, (1334), 326 states have call successors, (326), 43 states have call predecessors, (326), 43 states have return successors, (326), 317 states have call predecessors, (326), 326 states have call successors, (326) [2023-11-29 05:14:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1986 transitions. [2023-11-29 05:14:26,678 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1986 transitions. Word has length 452 [2023-11-29 05:14:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:26,679 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 1986 transitions. [2023-11-29 05:14:26,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1986 transitions. [2023-11-29 05:14:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 05:14:26,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:26,686 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:26,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:14:26,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:14:26,887 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:26,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:26,888 INFO L85 PathProgramCache]: Analyzing trace with hash -165517193, now seen corresponding path program 1 times [2023-11-29 05:14:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:26,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398717219] [2023-11-29 05:14:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:26,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:26,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109024248] [2023-11-29 05:14:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:26,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:26,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:26,950 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:26,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:14:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:27,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:14:27,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:14:27,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:14:27,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:27,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398717219] [2023-11-29 05:14:27,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:27,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109024248] [2023-11-29 05:14:27,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109024248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:14:27,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:14:27,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:14:27,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052563249] [2023-11-29 05:14:27,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:27,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:14:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:27,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:14:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:14:27,683 INFO L87 Difference]: Start difference. First operand 1279 states and 1986 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:27,905 INFO L93 Difference]: Finished difference Result 3811 states and 5916 transitions. [2023-11-29 05:14:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:14:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 452 [2023-11-29 05:14:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:27,925 INFO L225 Difference]: With dead ends: 3811 [2023-11-29 05:14:27,925 INFO L226 Difference]: Without dead ends: 2545 [2023-11-29 05:14:27,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:14:27,931 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 120 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:27,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 675 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:14:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2023-11-29 05:14:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2472. [2023-11-29 05:14:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 1768 states have (on average 1.467760180995475) internal successors, (2595), 1784 states have internal predecessors, (2595), 620 states have call successors, (620), 83 states have call predecessors, (620), 83 states have return successors, (620), 604 states have call predecessors, (620), 620 states have call successors, (620) [2023-11-29 05:14:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3835 transitions. [2023-11-29 05:14:28,231 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3835 transitions. Word has length 452 [2023-11-29 05:14:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:28,232 INFO L495 AbstractCegarLoop]: Abstraction has 2472 states and 3835 transitions. [2023-11-29 05:14:28,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3835 transitions. [2023-11-29 05:14:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 05:14:28,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:28,239 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:28,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:14:28,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:14:28,439 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:28,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1854460935, now seen corresponding path program 1 times [2023-11-29 05:14:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:28,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091350570] [2023-11-29 05:14:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:28,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:28,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:28,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627872516] [2023-11-29 05:14:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:28,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:28,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:28,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:14:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:28,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:14:28,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:14:30,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:14:30,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:30,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091350570] [2023-11-29 05:14:30,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:30,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627872516] [2023-11-29 05:14:30,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627872516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:14:30,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:14:30,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:14:30,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665953594] [2023-11-29 05:14:30,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:30,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:14:30,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:30,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:14:30,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:14:30,060 INFO L87 Difference]: Start difference. First operand 2472 states and 3835 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:30,555 INFO L93 Difference]: Finished difference Result 6122 states and 9630 transitions. [2023-11-29 05:14:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:14:30,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 452 [2023-11-29 05:14:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:30,575 INFO L225 Difference]: With dead ends: 6122 [2023-11-29 05:14:30,576 INFO L226 Difference]: Without dead ends: 3663 [2023-11-29 05:14:30,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:14:30,583 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 475 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:30,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 1078 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:14:30,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3663 states. [2023-11-29 05:14:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3663 to 3006. [2023-11-29 05:14:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 2260 states have (on average 1.5424778761061948) internal successors, (3486), 2274 states have internal predecessors, (3486), 660 states have call successors, (660), 85 states have call predecessors, (660), 85 states have return successors, (660), 646 states have call predecessors, (660), 660 states have call successors, (660) [2023-11-29 05:14:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 4806 transitions. [2023-11-29 05:14:30,907 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 4806 transitions. Word has length 452 [2023-11-29 05:14:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:30,908 INFO L495 AbstractCegarLoop]: Abstraction has 3006 states and 4806 transitions. [2023-11-29 05:14:30,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 4806 transitions. [2023-11-29 05:14:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:14:30,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:30,914 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:30,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:14:31,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:31,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:31,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash 53348488, now seen corresponding path program 1 times [2023-11-29 05:14:31,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:31,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008754098] [2023-11-29 05:14:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:31,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:31,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:31,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598855468] [2023-11-29 05:14:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:31,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:31,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:31,166 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:31,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:14:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:31,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:14:31,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:14:38,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:14:38,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:38,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008754098] [2023-11-29 05:14:38,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598855468] [2023-11-29 05:14:38,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598855468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:14:38,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:14:38,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 05:14:38,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571192677] [2023-11-29 05:14:38,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:38,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:14:38,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:14:38,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:14:38,934 INFO L87 Difference]: Start difference. First operand 3006 states and 4806 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:41,009 INFO L93 Difference]: Finished difference Result 9120 states and 14149 transitions. [2023-11-29 05:14:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:14:41,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 453 [2023-11-29 05:14:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:41,042 INFO L225 Difference]: With dead ends: 9120 [2023-11-29 05:14:41,042 INFO L226 Difference]: Without dead ends: 6724 [2023-11-29 05:14:41,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:14:41,050 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 1371 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:41,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1371 Valid, 2064 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:14:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6724 states. [2023-11-29 05:14:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6724 to 5086. [2023-11-29 05:14:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5086 states, 3656 states have (on average 1.4485776805251642) internal successors, (5296), 3685 states have internal predecessors, (5296), 1248 states have call successors, (1248), 181 states have call predecessors, (1248), 181 states have return successors, (1248), 1219 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-11-29 05:14:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5086 states to 5086 states and 7792 transitions. [2023-11-29 05:14:41,532 INFO L78 Accepts]: Start accepts. Automaton has 5086 states and 7792 transitions. Word has length 453 [2023-11-29 05:14:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:41,533 INFO L495 AbstractCegarLoop]: Abstraction has 5086 states and 7792 transitions. [2023-11-29 05:14:41,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 5086 states and 7792 transitions. [2023-11-29 05:14:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:14:41,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:41,541 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:41,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:14:41,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:41,743 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:41,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:41,743 INFO L85 PathProgramCache]: Analyzing trace with hash 754413066, now seen corresponding path program 1 times [2023-11-29 05:14:41,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:41,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344611849] [2023-11-29 05:14:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:41,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:41,807 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798645121] [2023-11-29 05:14:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:41,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:41,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:41,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:41,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:14:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:42,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:14:42,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:14:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:14:48,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:14:48,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:14:48,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344611849] [2023-11-29 05:14:48,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:14:48,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798645121] [2023-11-29 05:14:48,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798645121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:14:48,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:14:48,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 05:14:48,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968653012] [2023-11-29 05:14:48,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:14:48,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:14:48,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:14:48,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:14:48,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:14:48,406 INFO L87 Difference]: Start difference. First operand 5086 states and 7792 transitions. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:49,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:14:49,959 INFO L93 Difference]: Finished difference Result 11036 states and 16861 transitions. [2023-11-29 05:14:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 05:14:49,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 453 [2023-11-29 05:14:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:14:50,000 INFO L225 Difference]: With dead ends: 11036 [2023-11-29 05:14:50,000 INFO L226 Difference]: Without dead ends: 6086 [2023-11-29 05:14:50,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:14:50,013 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 1232 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:14:50,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 1725 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:14:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2023-11-29 05:14:50,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5006. [2023-11-29 05:14:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 3576 states have (on average 1.45413870246085) internal successors, (5200), 3605 states have internal predecessors, (5200), 1248 states have call successors, (1248), 181 states have call predecessors, (1248), 181 states have return successors, (1248), 1219 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-11-29 05:14:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 7696 transitions. [2023-11-29 05:14:50,472 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 7696 transitions. Word has length 453 [2023-11-29 05:14:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:14:50,473 INFO L495 AbstractCegarLoop]: Abstraction has 5006 states and 7696 transitions. [2023-11-29 05:14:50,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:14:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 7696 transitions. [2023-11-29 05:14:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:14:50,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:14:50,478 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:14:50,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:14:50,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:50,679 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:14:50,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:14:50,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1625405768, now seen corresponding path program 1 times [2023-11-29 05:14:50,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:14:50,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441774779] [2023-11-29 05:14:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:50,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:14:50,731 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:14:50,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114473271] [2023-11-29 05:14:50,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:14:50,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:14:50,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:14:50,733 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:14:50,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:14:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:14:51,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 05:14:51,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:15:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2753 proven. 1446 refuted. 0 times theorem prover too weak. 6025 trivial. 0 not checked. [2023-11-29 05:15:04,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:16:11,671 WARN L293 SmtUtils]: Spent 20.49s on a formula simplification. DAG size of input: 178 DAG size of output: 155 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:16:51,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:16:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441774779] [2023-11-29 05:16:51,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:16:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114473271] [2023-11-29 05:16:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114473271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:16:51,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:16:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2023-11-29 05:16:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315335407] [2023-11-29 05:16:51,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:16:51,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 05:16:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:16:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 05:16:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=2367, Unknown=1, NotChecked=0, Total=2862 [2023-11-29 05:16:51,347 INFO L87 Difference]: Start difference. First operand 5006 states and 7696 transitions. Second operand has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 36 states have internal predecessors, (123), 8 states have call successors, (72), 8 states have call predecessors, (72), 10 states have return successors, (72), 7 states have call predecessors, (72), 8 states have call successors, (72) [2023-11-29 05:17:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:17:01,166 INFO L93 Difference]: Finished difference Result 12480 states and 18907 transitions. [2023-11-29 05:17:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 05:17:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 36 states have internal predecessors, (123), 8 states have call successors, (72), 8 states have call predecessors, (72), 10 states have return successors, (72), 7 states have call predecessors, (72), 8 states have call successors, (72) Word has length 453 [2023-11-29 05:17:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:17:01,192 INFO L225 Difference]: With dead ends: 12480 [2023-11-29 05:17:01,193 INFO L226 Difference]: Without dead ends: 7610 [2023-11-29 05:17:01,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4720 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=2491, Invalid=12760, Unknown=1, NotChecked=0, Total=15252 [2023-11-29 05:17:01,213 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 1486 mSDsluCounter, 2425 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:17:01,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 2692 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 05:17:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2023-11-29 05:17:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5938. [2023-11-29 05:17:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5938 states, 4453 states have (on average 1.4446440601841455) internal successors, (6433), 4482 states have internal predecessors, (6433), 1248 states have call successors, (1248), 236 states have call predecessors, (1248), 236 states have return successors, (1248), 1219 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-11-29 05:17:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 8929 transitions. [2023-11-29 05:17:01,775 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 8929 transitions. Word has length 453 [2023-11-29 05:17:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:17:01,776 INFO L495 AbstractCegarLoop]: Abstraction has 5938 states and 8929 transitions. [2023-11-29 05:17:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 36 states have internal predecessors, (123), 8 states have call successors, (72), 8 states have call predecessors, (72), 10 states have return successors, (72), 7 states have call predecessors, (72), 8 states have call successors, (72) [2023-11-29 05:17:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 8929 transitions. [2023-11-29 05:17:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:17:01,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:17:01,785 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:17:01,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:17:01,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:17:01,986 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:17:01,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:17:01,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1968496950, now seen corresponding path program 1 times [2023-11-29 05:17:01,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:17:01,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642163068] [2023-11-29 05:17:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:17:01,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:17:02,040 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:17:02,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555841967] [2023-11-29 05:17:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:17:02,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:17:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:17:02,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:17:02,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:17:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:17:02,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 05:17:02,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:17:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2942 proven. 1260 refuted. 0 times theorem prover too weak. 6022 trivial. 0 not checked. [2023-11-29 05:17:18,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:18:23,116 WARN L293 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 290 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:18:54,024 WARN L293 SmtUtils]: Spent 7.98s on a formula simplification that was a NOOP. DAG size: 274 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:19:37,665 WARN L293 SmtUtils]: Spent 15.49s on a formula simplification that was a NOOP. DAG size: 277 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:22:14,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:22:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642163068] [2023-11-29 05:22:14,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:22:14,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555841967] [2023-11-29 05:22:14,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555841967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:22:14,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:22:14,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2023-11-29 05:22:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320594905] [2023-11-29 05:22:14,939 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:22:14,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 05:22:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:22:14,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 05:22:14,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=1936, Unknown=8, NotChecked=0, Total=2352 [2023-11-29 05:22:14,942 INFO L87 Difference]: Start difference. First operand 5938 states and 8929 transitions. Second operand has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 34 states have internal predecessors, (126), 8 states have call successors, (72), 8 states have call predecessors, (72), 11 states have return successors, (72), 7 states have call predecessors, (72), 8 states have call successors, (72) [2023-11-29 05:22:25,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:22:25,293 INFO L93 Difference]: Finished difference Result 10716 states and 16004 transitions. [2023-11-29 05:22:25,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 05:22:25,294 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 34 states have internal predecessors, (126), 8 states have call successors, (72), 8 states have call predecessors, (72), 11 states have return successors, (72), 7 states have call predecessors, (72), 8 states have call successors, (72) Word has length 453 [2023-11-29 05:22:25,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:22:25,310 INFO L225 Difference]: With dead ends: 10716 [2023-11-29 05:22:25,310 INFO L226 Difference]: Without dead ends: 8320 [2023-11-29 05:22:25,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3835 ImplicationChecksByTransitivity, 88.5s TimeCoverageRelationStatistics Valid=2105, Invalid=10543, Unknown=8, NotChecked=0, Total=12656 [2023-11-29 05:22:25,321 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 1917 mSDsluCounter, 3054 mSDsCounter, 0 mSdLazyCounter, 3078 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1917 SdHoareTripleChecker+Valid, 3326 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 3078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:22:25,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1917 Valid, 3326 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 3078 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 05:22:25,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8320 states. [2023-11-29 05:22:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8320 to 6082. [2023-11-29 05:22:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6082 states, 4597 states have (on average 1.4411572764846639) internal successors, (6625), 4626 states have internal predecessors, (6625), 1248 states have call successors, (1248), 236 states have call predecessors, (1248), 236 states have return successors, (1248), 1219 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-11-29 05:22:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6082 states to 6082 states and 9121 transitions. [2023-11-29 05:22:25,818 INFO L78 Accepts]: Start accepts. Automaton has 6082 states and 9121 transitions. Word has length 453 [2023-11-29 05:22:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:22:25,819 INFO L495 AbstractCegarLoop]: Abstraction has 6082 states and 9121 transitions. [2023-11-29 05:22:25,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4054054054054053) internal successors, (126), 34 states have internal predecessors, (126), 8 states have call successors, (72), 8 states have call predecessors, (72), 11 states have return successors, (72), 7 states have call predecessors, (72), 8 states have call successors, (72) [2023-11-29 05:22:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6082 states and 9121 transitions. [2023-11-29 05:22:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:22:25,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:22:25,827 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:22:25,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:22:26,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:22:26,028 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:22:26,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:22:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1451343926, now seen corresponding path program 1 times [2023-11-29 05:22:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:22:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324352984] [2023-11-29 05:22:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:22:26,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:22:26,079 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:22:26,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327394917] [2023-11-29 05:22:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:22:26,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:22:26,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:22:26,081 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:22:26,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:22:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:22:26,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 988 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 05:22:26,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:22:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2103 proven. 189 refuted. 0 times theorem prover too weak. 7932 trivial. 0 not checked. [2023-11-29 05:22:35,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:23:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:23:52,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:23:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324352984] [2023-11-29 05:23:52,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:23:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327394917] [2023-11-29 05:23:52,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327394917] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:23:52,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:23:52,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [15] total 26 [2023-11-29 05:23:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965059436] [2023-11-29 05:23:52,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:23:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:23:52,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:23:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:23:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=507, Unknown=5, NotChecked=0, Total=650 [2023-11-29 05:23:52,463 INFO L87 Difference]: Start difference. First operand 6082 states and 9121 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:24:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:24:06,461 INFO L93 Difference]: Finished difference Result 14498 states and 21987 transitions. [2023-11-29 05:24:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 05:24:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 453 [2023-11-29 05:24:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:24:06,484 INFO L225 Difference]: With dead ends: 14498 [2023-11-29 05:24:06,484 INFO L226 Difference]: Without dead ends: 12102 [2023-11-29 05:24:06,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 881 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=472, Invalid=1973, Unknown=5, NotChecked=0, Total=2450 [2023-11-29 05:24:06,492 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 1115 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:24:06,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 2323 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-11-29 05:24:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12102 states. [2023-11-29 05:24:07,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12102 to 8780. [2023-11-29 05:24:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8780 states, 6627 states have (on average 1.460540214274936) internal successors, (9679), 6670 states have internal predecessors, (9679), 1836 states have call successors, (1836), 316 states have call predecessors, (1836), 316 states have return successors, (1836), 1793 states have call predecessors, (1836), 1836 states have call successors, (1836) [2023-11-29 05:24:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8780 states to 8780 states and 13351 transitions. [2023-11-29 05:24:07,495 INFO L78 Accepts]: Start accepts. Automaton has 8780 states and 13351 transitions. Word has length 453 [2023-11-29 05:24:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:24:07,496 INFO L495 AbstractCegarLoop]: Abstraction has 8780 states and 13351 transitions. [2023-11-29 05:24:07,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:24:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8780 states and 13351 transitions. [2023-11-29 05:24:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:24:07,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:24:07,504 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:07,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:24:07,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:07,704 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:24:07,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1534999414, now seen corresponding path program 1 times [2023-11-29 05:24:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:07,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179345567] [2023-11-29 05:24:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:07,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:24:07,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280546337] [2023-11-29 05:24:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:07,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:07,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:07,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:07,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:24:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:08,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:24:08,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:24:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2103 proven. 189 refuted. 0 times theorem prover too weak. 7932 trivial. 0 not checked. [2023-11-29 05:24:10,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:24:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 24 proven. 189 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 05:24:35,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:24:35,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179345567] [2023-11-29 05:24:35,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:24:35,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280546337] [2023-11-29 05:24:35,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280546337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:24:35,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:24:35,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2023-11-29 05:24:35,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214967856] [2023-11-29 05:24:35,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:24:35,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:24:35,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:24:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:24:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:24:35,962 INFO L87 Difference]: Start difference. First operand 8780 states and 13351 transitions. Second operand has 22 states, 22 states have (on average 9.0) internal successors, (198), 22 states have internal predecessors, (198), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-29 05:24:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:24:57,016 INFO L93 Difference]: Finished difference Result 19396 states and 29357 transitions. [2023-11-29 05:24:57,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-29 05:24:57,017 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 9.0) internal successors, (198), 22 states have internal predecessors, (198), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) Word has length 453 [2023-11-29 05:24:57,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:24:57,044 INFO L225 Difference]: With dead ends: 19396 [2023-11-29 05:24:57,044 INFO L226 Difference]: Without dead ends: 10780 [2023-11-29 05:24:57,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 887 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1295, Invalid=6895, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 05:24:57,066 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 1981 mSDsluCounter, 2828 mSDsCounter, 0 mSdLazyCounter, 2992 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1983 SdHoareTripleChecker+Valid, 3110 SdHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 2992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:24:57,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1983 Valid, 3110 Invalid, 3378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 2992 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-11-29 05:24:57,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10780 states. [2023-11-29 05:24:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10780 to 7876. [2023-11-29 05:24:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7876 states, 6247 states have (on average 1.4818312790139267) internal successors, (9257), 6307 states have internal predecessors, (9257), 1408 states have call successors, (1408), 220 states have call predecessors, (1408), 220 states have return successors, (1408), 1348 states have call predecessors, (1408), 1408 states have call successors, (1408) [2023-11-29 05:24:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7876 states to 7876 states and 12073 transitions. [2023-11-29 05:24:57,980 INFO L78 Accepts]: Start accepts. Automaton has 7876 states and 12073 transitions. Word has length 453 [2023-11-29 05:24:57,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:24:57,980 INFO L495 AbstractCegarLoop]: Abstraction has 7876 states and 12073 transitions. [2023-11-29 05:24:57,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.0) internal successors, (198), 22 states have internal predecessors, (198), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-29 05:24:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 7876 states and 12073 transitions. [2023-11-29 05:24:57,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:24:57,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:24:57,985 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:24:57,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:24:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:58,186 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:24:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:24:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash 37057866, now seen corresponding path program 1 times [2023-11-29 05:24:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:24:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943935295] [2023-11-29 05:24:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:24:58,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:24:58,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107072930] [2023-11-29 05:24:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:24:58,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:24:58,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:24:58,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:24:58,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:24:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:24:58,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 05:24:58,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3036 proven. 948 refuted. 0 times theorem prover too weak. 6240 trivial. 0 not checked. [2023-11-29 05:25:16,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:56,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:25:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943935295] [2023-11-29 05:25:56,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:25:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107072930] [2023-11-29 05:25:56,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107072930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:25:56,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:25:56,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-11-29 05:25:56,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036527487] [2023-11-29 05:25:56,917 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:56,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 05:25:56,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:25:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 05:25:56,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1715, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 05:25:56,920 INFO L87 Difference]: Start difference. First operand 7876 states and 12073 transitions. Second operand has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 31 states have internal predecessors, (123), 7 states have call successors, (72), 7 states have call predecessors, (72), 10 states have return successors, (72), 6 states have call predecessors, (72), 7 states have call successors, (72) [2023-11-29 05:26:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:26:14,425 INFO L93 Difference]: Finished difference Result 15204 states and 23193 transitions. [2023-11-29 05:26:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 05:26:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 31 states have internal predecessors, (123), 7 states have call successors, (72), 7 states have call predecessors, (72), 10 states have return successors, (72), 6 states have call predecessors, (72), 7 states have call successors, (72) Word has length 453 [2023-11-29 05:26:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:26:14,443 INFO L225 Difference]: With dead ends: 15204 [2023-11-29 05:26:14,443 INFO L226 Difference]: Without dead ends: 8934 [2023-11-29 05:26:14,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=1803, Invalid=9326, Unknown=1, NotChecked=0, Total=11130 [2023-11-29 05:26:14,481 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 780 mSDsluCounter, 4112 mSDsCounter, 0 mSdLazyCounter, 2783 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 4379 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:26:14,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 4379 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2783 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 05:26:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8934 states. [2023-11-29 05:26:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8934 to 7992. [2023-11-29 05:26:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7992 states, 6362 states have (on average 1.4806664570889658) internal successors, (9420), 6422 states have internal predecessors, (9420), 1408 states have call successors, (1408), 221 states have call predecessors, (1408), 221 states have return successors, (1408), 1348 states have call predecessors, (1408), 1408 states have call successors, (1408) [2023-11-29 05:26:15,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7992 states to 7992 states and 12236 transitions. [2023-11-29 05:26:15,161 INFO L78 Accepts]: Start accepts. Automaton has 7992 states and 12236 transitions. Word has length 453 [2023-11-29 05:26:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:26:15,162 INFO L495 AbstractCegarLoop]: Abstraction has 7992 states and 12236 transitions. [2023-11-29 05:26:15,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.727272727272727) internal successors, (123), 31 states have internal predecessors, (123), 7 states have call successors, (72), 7 states have call predecessors, (72), 10 states have return successors, (72), 6 states have call predecessors, (72), 7 states have call successors, (72) [2023-11-29 05:26:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7992 states and 12236 transitions. [2023-11-29 05:26:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:26:15,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:26:15,166 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:15,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:26:15,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:15,367 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:26:15,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:15,368 INFO L85 PathProgramCache]: Analyzing trace with hash 554210890, now seen corresponding path program 1 times [2023-11-29 05:26:15,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:15,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015034089] [2023-11-29 05:26:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:15,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:26:15,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113682692] [2023-11-29 05:26:15,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:15,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:15,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:15,407 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:15,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:26:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:15,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 05:26:15,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2753 proven. 1446 refuted. 0 times theorem prover too weak. 6025 trivial. 0 not checked. [2023-11-29 05:26:24,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 120 proven. 1113 refuted. 0 times theorem prover too weak. 8991 trivial. 0 not checked. [2023-11-29 05:26:31,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:31,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015034089] [2023-11-29 05:26:31,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:26:31,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113682692] [2023-11-29 05:26:31,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113682692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:31,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:31,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 51 [2023-11-29 05:26:31,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318627041] [2023-11-29 05:26:31,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:31,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 05:26:31,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:31,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 05:26:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=2021, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 05:26:31,353 INFO L87 Difference]: Start difference. First operand 7992 states and 12236 transitions. Second operand has 51 states, 50 states have (on average 4.54) internal successors, (227), 48 states have internal predecessors, (227), 14 states have call successors, (143), 8 states have call predecessors, (143), 17 states have return successors, (144), 13 states have call predecessors, (144), 14 states have call successors, (144) [2023-11-29 05:26:41,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:26:41,496 INFO L93 Difference]: Finished difference Result 20734 states and 29859 transitions. [2023-11-29 05:26:41,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 05:26:41,497 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.54) internal successors, (227), 48 states have internal predecessors, (227), 14 states have call successors, (143), 8 states have call predecessors, (143), 17 states have return successors, (144), 13 states have call predecessors, (144), 14 states have call successors, (144) Word has length 453 [2023-11-29 05:26:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:26:41,527 INFO L225 Difference]: With dead ends: 20734 [2023-11-29 05:26:41,527 INFO L226 Difference]: Without dead ends: 14208 [2023-11-29 05:26:41,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 858 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3047 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2329, Invalid=8177, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 05:26:41,541 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 1797 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 3244 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1798 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 3467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:26:41,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1798 Valid, 2822 Invalid, 3467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3244 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 05:26:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14208 states. [2023-11-29 05:26:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14208 to 7632. [2023-11-29 05:26:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7632 states, 5986 states have (on average 1.4333444704310057) internal successors, (8580), 6014 states have internal predecessors, (8580), 1248 states have call successors, (1248), 397 states have call predecessors, (1248), 397 states have return successors, (1248), 1220 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-11-29 05:26:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7632 states to 7632 states and 11076 transitions. [2023-11-29 05:26:43,156 INFO L78 Accepts]: Start accepts. Automaton has 7632 states and 11076 transitions. Word has length 453 [2023-11-29 05:26:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:26:43,157 INFO L495 AbstractCegarLoop]: Abstraction has 7632 states and 11076 transitions. [2023-11-29 05:26:43,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.54) internal successors, (227), 48 states have internal predecessors, (227), 14 states have call successors, (143), 8 states have call predecessors, (143), 17 states have return successors, (144), 13 states have call predecessors, (144), 14 states have call successors, (144) [2023-11-29 05:26:43,158 INFO L276 IsEmpty]: Start isEmpty. Operand 7632 states and 11076 transitions. [2023-11-29 05:26:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:26:43,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:26:43,163 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:43,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:26:43,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:43,364 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:26:43,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash 738122444, now seen corresponding path program 1 times [2023-11-29 05:26:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:43,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277288058] [2023-11-29 05:26:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:43,398 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:26:43,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846817651] [2023-11-29 05:26:43,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:43,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:43,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:43,399 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:43,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:26:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:43,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:26:43,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 05:26:51,232 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:26:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277288058] [2023-11-29 05:26:51,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:26:51,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846817651] [2023-11-29 05:26:51,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846817651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:51,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:51,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 05:26:51,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564847067] [2023-11-29 05:26:51,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:51,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:26:51,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:26:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:26:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:26:51,235 INFO L87 Difference]: Start difference. First operand 7632 states and 11076 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:26:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:26:54,988 INFO L93 Difference]: Finished difference Result 14758 states and 21253 transitions. [2023-11-29 05:26:54,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 05:26:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 453 [2023-11-29 05:26:54,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:26:55,002 INFO L225 Difference]: With dead ends: 14758 [2023-11-29 05:26:55,003 INFO L226 Difference]: Without dead ends: 8608 [2023-11-29 05:26:55,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=337, Invalid=1145, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:26:55,011 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 709 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:26:55,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 2146 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 05:26:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2023-11-29 05:26:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 7632. [2023-11-29 05:26:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7632 states, 5986 states have (on average 1.4333444704310057) internal successors, (8580), 6014 states have internal predecessors, (8580), 1248 states have call successors, (1248), 397 states have call predecessors, (1248), 397 states have return successors, (1248), 1220 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-11-29 05:26:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7632 states to 7632 states and 11076 transitions. [2023-11-29 05:26:56,066 INFO L78 Accepts]: Start accepts. Automaton has 7632 states and 11076 transitions. Word has length 453 [2023-11-29 05:26:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:26:56,066 INFO L495 AbstractCegarLoop]: Abstraction has 7632 states and 11076 transitions. [2023-11-29 05:26:56,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 05:26:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 7632 states and 11076 transitions. [2023-11-29 05:26:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 05:26:56,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:26:56,070 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:56,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:26:56,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:56,271 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:26:56,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:56,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1255275468, now seen corresponding path program 1 times [2023-11-29 05:26:56,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:26:56,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809240284] [2023-11-29 05:26:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:56,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:26:56,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:26:56,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938515964] [2023-11-29 05:26:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:56,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:26:56,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:26:56,321 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:26:56,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:26:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:56,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-29 05:26:56,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2045 proven. 792 refuted. 0 times theorem prover too weak. 7387 trivial. 0 not checked. [2023-11-29 05:27:18,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:03,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:03,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809240284] [2023-11-29 05:28:03,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:28:03,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938515964] [2023-11-29 05:28:03,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938515964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:28:03,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:28:03,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-11-29 05:28:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075831022] [2023-11-29 05:28:03,819 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:03,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:28:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:28:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 05:28:03,821 INFO L87 Difference]: Start difference. First operand 7632 states and 11076 transitions. Second operand has 30 states, 30 states have (on average 3.8) internal successors, (114), 28 states have internal predecessors, (114), 5 states have call successors, (72), 5 states have call predecessors, (72), 7 states have return successors, (72), 4 states have call predecessors, (72), 5 states have call successors, (72) [2023-11-29 05:28:13,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:13,945 INFO L93 Difference]: Finished difference Result 15172 states and 21825 transitions. [2023-11-29 05:28:13,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 05:28:13,945 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 28 states have internal predecessors, (114), 5 states have call successors, (72), 5 states have call predecessors, (72), 7 states have return successors, (72), 4 states have call predecessors, (72), 5 states have call successors, (72) Word has length 453 [2023-11-29 05:28:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:13,956 INFO L225 Difference]: With dead ends: 15172 [2023-11-29 05:28:13,956 INFO L226 Difference]: Without dead ends: 9022 [2023-11-29 05:28:13,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2018, Invalid=8694, Unknown=0, NotChecked=0, Total=10712 [2023-11-29 05:28:13,965 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 961 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 2835 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 3007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:13,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [961 Valid, 3654 Invalid, 3007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2835 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 05:28:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9022 states. [2023-11-29 05:28:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9022 to 7680. [2023-11-29 05:28:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7680 states, 6034 states have (on average 1.4325488896254557) internal successors, (8644), 6062 states have internal predecessors, (8644), 1248 states have call successors, (1248), 397 states have call predecessors, (1248), 397 states have return successors, (1248), 1220 states have call predecessors, (1248), 1248 states have call successors, (1248) [2023-11-29 05:28:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7680 states to 7680 states and 11140 transitions. [2023-11-29 05:28:15,137 INFO L78 Accepts]: Start accepts. Automaton has 7680 states and 11140 transitions. Word has length 453 [2023-11-29 05:28:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:15,138 INFO L495 AbstractCegarLoop]: Abstraction has 7680 states and 11140 transitions. [2023-11-29 05:28:15,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8) internal successors, (114), 28 states have internal predecessors, (114), 5 states have call successors, (72), 5 states have call predecessors, (72), 7 states have return successors, (72), 4 states have call predecessors, (72), 5 states have call successors, (72) [2023-11-29 05:28:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7680 states and 11140 transitions. [2023-11-29 05:28:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-29 05:28:15,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:15,142 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:15,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:28:15,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:15,342 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:15,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash 322067470, now seen corresponding path program 1 times [2023-11-29 05:28:15,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:15,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177493540] [2023-11-29 05:28:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:15,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:15,377 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:28:15,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810013759] [2023-11-29 05:28:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:15,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:15,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:15,379 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:15,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:28:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:15,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:28:15,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3203 proven. 39 refuted. 0 times theorem prover too weak. 6982 trivial. 0 not checked. [2023-11-29 05:28:16,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 174 proven. 39 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 05:28:16,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:28:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177493540] [2023-11-29 05:28:16,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:28:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810013759] [2023-11-29 05:28:16,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810013759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:16,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:28:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 05:28:16,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801668836] [2023-11-29 05:28:16,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:16,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:28:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:28:16,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:28:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:28:16,789 INFO L87 Difference]: Start difference. First operand 7680 states and 11140 transitions. Second operand has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-29 05:28:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:28:20,777 INFO L93 Difference]: Finished difference Result 18117 states and 25873 transitions. [2023-11-29 05:28:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:28:20,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) Word has length 454 [2023-11-29 05:28:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:28:20,795 INFO L225 Difference]: With dead ends: 18117 [2023-11-29 05:28:20,795 INFO L226 Difference]: Without dead ends: 14465 [2023-11-29 05:28:20,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 896 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:28:20,801 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 1809 mSDsluCounter, 2075 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1810 SdHoareTripleChecker+Valid, 2524 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:28:20,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1810 Valid, 2524 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 05:28:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14465 states. [2023-11-29 05:28:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14465 to 11794. [2023-11-29 05:28:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 8986 states have (on average 1.3930558646783886) internal successors, (12518), 9037 states have internal predecessors, (12518), 2116 states have call successors, (2116), 691 states have call predecessors, (2116), 691 states have return successors, (2116), 2065 states have call predecessors, (2116), 2116 states have call successors, (2116) [2023-11-29 05:28:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 16750 transitions. [2023-11-29 05:28:22,491 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 16750 transitions. Word has length 454 [2023-11-29 05:28:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:28:22,491 INFO L495 AbstractCegarLoop]: Abstraction has 11794 states and 16750 transitions. [2023-11-29 05:28:22,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-29 05:28:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 16750 transitions. [2023-11-29 05:28:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-29 05:28:22,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:28:22,496 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:22,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:28:22,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:22,697 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:28:22,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash -495580980, now seen corresponding path program 1 times [2023-11-29 05:28:22,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:28:22,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479424479] [2023-11-29 05:28:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:28:22,736 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:28:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938594270] [2023-11-29 05:28:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:22,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:28:22,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:28:22,738 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:28:22,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb4982af-10b3-4606-ab9d-b567cf1e2cc2/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:28:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:23,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-29 05:28:23,055 INFO L285 TraceCheckSpWp]: Computing forward predicates...