./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.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_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/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_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/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_03f80541-a5b8-4290-be3a-e593497fbdba/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 d402cd14beee6851ca97c58b2a2589220820214ac9c394c1c5bdac6dbc1a1025 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:33:13,445 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:33:13,514 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:33:13,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:33:13,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:33:13,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:33:13,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:33:13,547 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:33:13,548 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:33:13,548 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:33:13,549 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:33:13,549 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:33:13,550 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:33:13,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:33:13,551 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:33:13,552 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:33:13,552 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:33:13,553 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:33:13,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:33:13,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:33:13,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:33:13,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:33:13,556 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:33:13,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:33:13,557 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:33:13,557 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:33:13,557 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:33:13,558 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:33:13,558 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:33:13,559 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:33:13,559 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:33:13,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:33:13,560 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:33:13,560 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:33:13,560 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:33:13,561 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:33:13,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:33:13,561 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:33:13,561 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:33:13,562 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:33:13,562 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:33:13,562 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:33:13,562 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_03f80541-a5b8-4290-be3a-e593497fbdba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d402cd14beee6851ca97c58b2a2589220820214ac9c394c1c5bdac6dbc1a1025 [2023-11-29 01:33:13,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:33:13,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:33:13,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:33:13,835 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:33:13,835 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:33:13,837 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i [2023-11-29 01:33:16,707 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:33:16,916 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:33:16,917 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i [2023-11-29 01:33:16,929 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/data/eeb4b340b/b1d28a081e55402b8a1a1a5abb3798cd/FLAG2aa9ecff7 [2023-11-29 01:33:16,947 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/data/eeb4b340b/b1d28a081e55402b8a1a1a5abb3798cd [2023-11-29 01:33:16,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:33:16,952 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:33:16,953 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:33:16,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:33:16,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:33:16,960 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:33:16" (1/1) ... [2023-11-29 01:33:16,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2335109a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:16, skipping insertion in model container [2023-11-29 01:33:16,962 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:33:16" (1/1) ... [2023-11-29 01:33:17,004 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:33:17,134 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_03f80541-a5b8-4290-be3a-e593497fbdba/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i[919,932] [2023-11-29 01:33:17,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:33:17,238 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:33:17,249 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_03f80541-a5b8-4290-be3a-e593497fbdba/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i[919,932] [2023-11-29 01:33:17,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:33:17,320 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:33:17,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17 WrapperNode [2023-11-29 01:33:17,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:33:17,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:33:17,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:33:17,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:33:17,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,398 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 301 [2023-11-29 01:33:17,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:33:17,399 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:33:17,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:33:17,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:33:17,411 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,416 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,442 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 01:33:17,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,465 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,471 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,475 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:33:17,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:33:17,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:33:17,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:33:17,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (1/1) ... [2023-11-29 01:33:17,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:33:17,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:17,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:33:17,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:33:17,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:33:17,569 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:33:17,569 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:33:17,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:33:17,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:33:17,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:33:17,668 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:33:17,671 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:33:18,203 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:33:18,241 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:33:18,241 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:33:18,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:33:18 BoogieIcfgContainer [2023-11-29 01:33:18,242 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:33:18,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:33:18,246 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:33:18,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:33:18,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:33:16" (1/3) ... [2023-11-29 01:33:18,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29df2747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:33:18, skipping insertion in model container [2023-11-29 01:33:18,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:33:17" (2/3) ... [2023-11-29 01:33:18,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29df2747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:33:18, skipping insertion in model container [2023-11-29 01:33:18,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:33:18" (3/3) ... [2023-11-29 01:33:18,252 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pr-co_file-81.i [2023-11-29 01:33:18,270 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:33:18,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:33:18,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:33:18,325 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;@4b9671b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:33:18,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:33:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 71 states have internal predecessors, (104), 48 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-29 01:33:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-11-29 01:33:18,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:18,349 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:18,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:18,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash 351485688, now seen corresponding path program 1 times [2023-11-29 01:33:18,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:18,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981537776] [2023-11-29 01:33:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:18,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:18,620 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:18,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376973010] [2023-11-29 01:33:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:18,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:18,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:18,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:18,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:33:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:18,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:33:18,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1547 proven. 111 refuted. 0 times theorem prover too weak. 2854 trivial. 0 not checked. [2023-11-29 01:33:19,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 30 proven. 111 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 01:33:20,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:20,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981537776] [2023-11-29 01:33:20,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:20,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376973010] [2023-11-29 01:33:20,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376973010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:20,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:20,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 01:33:20,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305701560] [2023-11-29 01:33:20,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:20,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:33:20,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:20,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:33:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:33:20,055 INFO L87 Difference]: Start difference. First operand has 121 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 71 states have internal predecessors, (104), 48 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-29 01:33:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:20,734 INFO L93 Difference]: Finished difference Result 297 states and 550 transitions. [2023-11-29 01:33:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:33:20,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) Word has length 291 [2023-11-29 01:33:20,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:20,751 INFO L225 Difference]: With dead ends: 297 [2023-11-29 01:33:20,751 INFO L226 Difference]: Without dead ends: 177 [2023-11-29 01:33:20,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:33:20,761 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 306 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:20,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 390 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:33:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-29 01:33:20,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2023-11-29 01:33:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 108 states have (on average 1.4444444444444444) internal successors, (156), 109 states have internal predecessors, (156), 58 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (58), 57 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-29 01:33:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 272 transitions. [2023-11-29 01:33:20,846 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 272 transitions. Word has length 291 [2023-11-29 01:33:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:20,849 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 272 transitions. [2023-11-29 01:33:20,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-29 01:33:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 272 transitions. [2023-11-29 01:33:20,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-29 01:33:20,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:20,860 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:20,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:33:21,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:21,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:21,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:21,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1369011136, now seen corresponding path program 1 times [2023-11-29 01:33:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:21,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186562522] [2023-11-29 01:33:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:21,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:21,145 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:21,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656664813] [2023-11-29 01:33:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:21,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:21,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:21,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:21,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:33:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:21,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:33:21,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1446 proven. 249 refuted. 0 times theorem prover too weak. 2817 trivial. 0 not checked. [2023-11-29 01:33:22,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 27 proven. 252 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2023-11-29 01:33:23,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:23,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186562522] [2023-11-29 01:33:23,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:23,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656664813] [2023-11-29 01:33:23,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656664813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:23,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 01:33:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123904053] [2023-11-29 01:33:23,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:23,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:33:23,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:33:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:33:23,535 INFO L87 Difference]: Start difference. First operand 170 states and 272 transitions. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 4 states have call predecessors, (96), 5 states have call successors, (96) [2023-11-29 01:33:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:24,546 INFO L93 Difference]: Finished difference Result 442 states and 690 transitions. [2023-11-29 01:33:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 01:33:24,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 4 states have call predecessors, (96), 5 states have call successors, (96) Word has length 292 [2023-11-29 01:33:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:24,552 INFO L225 Difference]: With dead ends: 442 [2023-11-29 01:33:24,552 INFO L226 Difference]: Without dead ends: 273 [2023-11-29 01:33:24,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:33:24,556 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 960 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:24,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 459 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:33:24,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-29 01:33:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 160. [2023-11-29 01:33:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 107 states have (on average 1.4766355140186915) internal successors, (158), 107 states have internal predecessors, (158), 48 states have call successors, (48), 4 states have call predecessors, (48), 4 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-29 01:33:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 254 transitions. [2023-11-29 01:33:24,592 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 254 transitions. Word has length 292 [2023-11-29 01:33:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:24,593 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 254 transitions. [2023-11-29 01:33:24,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 4 states have call predecessors, (96), 5 states have call successors, (96) [2023-11-29 01:33:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 254 transitions. [2023-11-29 01:33:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-29 01:33:24,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:24,600 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:24,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:33:24,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:24,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:24,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:24,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1964697537, now seen corresponding path program 1 times [2023-11-29 01:33:24,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:24,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197795198] [2023-11-29 01:33:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:24,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:24,859 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:24,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671432386] [2023-11-29 01:33:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:24,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:24,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:24,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:24,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:33:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:25,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:33:25,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1311 proven. 117 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2023-11-29 01:33:25,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 01:33:25,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:25,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197795198] [2023-11-29 01:33:25,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:25,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671432386] [2023-11-29 01:33:25,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671432386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:25,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:25,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-29 01:33:25,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034133790] [2023-11-29 01:33:25,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:25,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:33:25,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:25,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:33:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-11-29 01:33:25,994 INFO L87 Difference]: Start difference. First operand 160 states and 254 transitions. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-29 01:33:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:28,662 INFO L93 Difference]: Finished difference Result 877 states and 1387 transitions. [2023-11-29 01:33:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 01:33:28,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) Word has length 292 [2023-11-29 01:33:28,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:28,670 INFO L225 Difference]: With dead ends: 877 [2023-11-29 01:33:28,671 INFO L226 Difference]: Without dead ends: 718 [2023-11-29 01:33:28,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=950, Invalid=3472, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 01:33:28,675 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1343 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:28,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1353 Valid, 1338 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 01:33:28,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2023-11-29 01:33:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 313. [2023-11-29 01:33:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 235 states have (on average 1.5063829787234042) internal successors, (354), 237 states have internal predecessors, (354), 66 states have call successors, (66), 11 states have call predecessors, (66), 11 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-29 01:33:28,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 486 transitions. [2023-11-29 01:33:28,734 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 486 transitions. Word has length 292 [2023-11-29 01:33:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:28,735 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 486 transitions. [2023-11-29 01:33:28,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-29 01:33:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 486 transitions. [2023-11-29 01:33:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 01:33:28,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:28,740 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:28,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:33:28,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:28,941 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:28,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:28,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1877762821, now seen corresponding path program 1 times [2023-11-29 01:33:28,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:28,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865593995] [2023-11-29 01:33:28,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:28,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:28,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:28,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578900825] [2023-11-29 01:33:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:28,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:28,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:28,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:28,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:33:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:29,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:33:29,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:33:29,190 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:29,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865593995] [2023-11-29 01:33:29,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:29,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578900825] [2023-11-29 01:33:29,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578900825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:29,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:33:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138925361] [2023-11-29 01:33:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:29,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:33:29,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:29,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:33:29,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:33:29,193 INFO L87 Difference]: Start difference. First operand 313 states and 486 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:33:29,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:29,295 INFO L93 Difference]: Finished difference Result 780 states and 1200 transitions. [2023-11-29 01:33:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:33:29,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 293 [2023-11-29 01:33:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:29,302 INFO L225 Difference]: With dead ends: 780 [2023-11-29 01:33:29,302 INFO L226 Difference]: Without dead ends: 468 [2023-11-29 01:33:29,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 291 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 01:33:29,304 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 39 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:29,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 379 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:33:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-29 01:33:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 463. [2023-11-29 01:33:29,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 367 states have (on average 1.4959128065395095) internal successors, (549), 372 states have internal predecessors, (549), 78 states have call successors, (78), 17 states have call predecessors, (78), 17 states have return successors, (78), 73 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-29 01:33:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 705 transitions. [2023-11-29 01:33:29,354 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 705 transitions. Word has length 293 [2023-11-29 01:33:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:29,355 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 705 transitions. [2023-11-29 01:33:29,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:33:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 705 transitions. [2023-11-29 01:33:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 01:33:29,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:29,359 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:29,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:33:29,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:29,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:29,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:29,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1820504519, now seen corresponding path program 1 times [2023-11-29 01:33:29,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:29,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619857640] [2023-11-29 01:33:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:29,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:29,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:29,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735445101] [2023-11-29 01:33:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:29,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:29,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:29,603 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:29,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:33:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:29,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:33:29,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-29 01:33:30,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 01:33:31,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619857640] [2023-11-29 01:33:31,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735445101] [2023-11-29 01:33:31,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735445101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:31,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 01:33:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734388402] [2023-11-29 01:33:31,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:33:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:33:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:33:31,041 INFO L87 Difference]: Start difference. First operand 463 states and 705 transitions. Second operand has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 01:33:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:33,058 INFO L93 Difference]: Finished difference Result 1609 states and 2439 transitions. [2023-11-29 01:33:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 01:33:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 293 [2023-11-29 01:33:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:33,068 INFO L225 Difference]: With dead ends: 1609 [2023-11-29 01:33:33,069 INFO L226 Difference]: Without dead ends: 1147 [2023-11-29 01:33:33,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 01:33:33,072 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 1786 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1833 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:33,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1833 Valid, 1127 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 01:33:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2023-11-29 01:33:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 711. [2023-11-29 01:33:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 542 states have (on average 1.4686346863468636) internal successors, (796), 549 states have internal predecessors, (796), 140 states have call successors, (140), 28 states have call predecessors, (140), 28 states have return successors, (140), 133 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 01:33:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1076 transitions. [2023-11-29 01:33:33,169 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1076 transitions. Word has length 293 [2023-11-29 01:33:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:33,170 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 1076 transitions. [2023-11-29 01:33:33,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 01:33:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1076 transitions. [2023-11-29 01:33:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 01:33:33,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:33,174 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:33,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:33:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:33,375 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:33,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash -131560777, now seen corresponding path program 1 times [2023-11-29 01:33:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:33,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365281790] [2023-11-29 01:33:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:33,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:33,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321560373] [2023-11-29 01:33:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:33,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:33,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:33,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:33:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:33,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:33:33,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-29 01:33:34,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 01:33:35,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:35,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365281790] [2023-11-29 01:33:35,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:35,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321560373] [2023-11-29 01:33:35,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321560373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:35,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:35,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 01:33:35,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547697492] [2023-11-29 01:33:35,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:35,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:33:35,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:35,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:33:35,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:33:35,044 INFO L87 Difference]: Start difference. First operand 711 states and 1076 transitions. Second operand has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 16 states have internal predecessors, (97), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 01:33:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:37,360 INFO L93 Difference]: Finished difference Result 1504 states and 2286 transitions. [2023-11-29 01:33:37,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:33:37,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 16 states have internal predecessors, (97), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 293 [2023-11-29 01:33:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:37,368 INFO L225 Difference]: With dead ends: 1504 [2023-11-29 01:33:37,368 INFO L226 Difference]: Without dead ends: 1036 [2023-11-29 01:33:37,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=962, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 01:33:37,370 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 1226 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:37,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 791 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 01:33:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2023-11-29 01:33:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 245. [2023-11-29 01:33:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 171 states have (on average 1.3976608187134503) internal successors, (239), 173 states have internal predecessors, (239), 62 states have call successors, (62), 11 states have call predecessors, (62), 11 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 01:33:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 363 transitions. [2023-11-29 01:33:37,432 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 363 transitions. Word has length 293 [2023-11-29 01:33:37,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:37,433 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 363 transitions. [2023-11-29 01:33:37,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 16 states have internal predecessors, (97), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 01:33:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 363 transitions. [2023-11-29 01:33:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 01:33:37,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:37,435 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:37,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:33:37,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:37,636 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:37,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1601649801, now seen corresponding path program 1 times [2023-11-29 01:33:37,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:37,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252053470] [2023-11-29 01:33:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:37,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:37,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:37,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768720142] [2023-11-29 01:33:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:37,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:37,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:37,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:37,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:33:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:37,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:33:37,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 96 proven. 276 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-29 01:33:39,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 279 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2023-11-29 01:33:40,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:40,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252053470] [2023-11-29 01:33:40,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768720142] [2023-11-29 01:33:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768720142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:40,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:40,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 01:33:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194975246] [2023-11-29 01:33:40,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:40,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:33:40,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:40,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:33:40,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:33:40,026 INFO L87 Difference]: Start difference. First operand 245 states and 363 transitions. Second operand has 18 states, 17 states have (on average 6.705882352941177) internal successors, (114), 16 states have internal predecessors, (114), 6 states have call successors, (96), 4 states have call predecessors, (96), 6 states have return successors, (96), 4 states have call predecessors, (96), 6 states have call successors, (96) [2023-11-29 01:33:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:42,963 INFO L93 Difference]: Finished difference Result 1547 states and 2306 transitions. [2023-11-29 01:33:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 01:33:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.705882352941177) internal successors, (114), 16 states have internal predecessors, (114), 6 states have call successors, (96), 4 states have call predecessors, (96), 6 states have return successors, (96), 4 states have call predecessors, (96), 6 states have call successors, (96) Word has length 293 [2023-11-29 01:33:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:42,970 INFO L225 Difference]: With dead ends: 1547 [2023-11-29 01:33:42,971 INFO L226 Difference]: Without dead ends: 1334 [2023-11-29 01:33:42,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=833, Invalid=1923, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:33:42,973 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1000 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 2370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:42,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 1296 Invalid, 2370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [696 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 01:33:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2023-11-29 01:33:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 874. [2023-11-29 01:33:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 618 states have (on average 1.3883495145631068) internal successors, (858), 623 states have internal predecessors, (858), 218 states have call successors, (218), 37 states have call predecessors, (218), 37 states have return successors, (218), 213 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-29 01:33:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1294 transitions. [2023-11-29 01:33:43,169 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1294 transitions. Word has length 293 [2023-11-29 01:33:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:43,169 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1294 transitions. [2023-11-29 01:33:43,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.705882352941177) internal successors, (114), 16 states have internal predecessors, (114), 6 states have call successors, (96), 4 states have call predecessors, (96), 6 states have return successors, (96), 4 states have call predecessors, (96), 6 states have call successors, (96) [2023-11-29 01:33:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1294 transitions. [2023-11-29 01:33:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 01:33:43,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:43,172 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:43,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:33:43,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:43,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:43,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash 699172789, now seen corresponding path program 1 times [2023-11-29 01:33:43,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:43,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463167710] [2023-11-29 01:33:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:43,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:43,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:43,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997616181] [2023-11-29 01:33:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:43,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:43,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:43,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:43,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:33:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:43,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 01:33:43,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-29 01:33:45,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 01:33:45,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463167710] [2023-11-29 01:33:45,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997616181] [2023-11-29 01:33:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997616181] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:45,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:45,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 01:33:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531890348] [2023-11-29 01:33:45,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:45,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:33:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:45,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:33:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:33:45,738 INFO L87 Difference]: Start difference. First operand 874 states and 1294 transitions. Second operand has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 01:33:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:47,325 INFO L93 Difference]: Finished difference Result 1759 states and 2647 transitions. [2023-11-29 01:33:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:33:47,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 293 [2023-11-29 01:33:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:47,331 INFO L225 Difference]: With dead ends: 1759 [2023-11-29 01:33:47,331 INFO L226 Difference]: Without dead ends: 921 [2023-11-29 01:33:47,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=785, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:33:47,333 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 913 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:47,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 1047 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:33:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-11-29 01:33:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 536. [2023-11-29 01:33:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 362 states have (on average 1.3646408839779005) internal successors, (494), 364 states have internal predecessors, (494), 152 states have call successors, (152), 21 states have call predecessors, (152), 21 states have return successors, (152), 150 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 01:33:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 798 transitions. [2023-11-29 01:33:47,521 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 798 transitions. Word has length 293 [2023-11-29 01:33:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:47,521 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 798 transitions. [2023-11-29 01:33:47,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 01:33:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 798 transitions. [2023-11-29 01:33:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 01:33:47,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:47,523 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:47,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:33:47,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:47,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:47,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:47,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1906850765, now seen corresponding path program 1 times [2023-11-29 01:33:47,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:47,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316575455] [2023-11-29 01:33:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:47,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:47,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191221323] [2023-11-29 01:33:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:47,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:47,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:47,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:47,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:33:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:48,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 01:33:48,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1549 proven. 912 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2023-11-29 01:34:23,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:34:32,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:32,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316575455] [2023-11-29 01:34:32,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:32,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191221323] [2023-11-29 01:34:32,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191221323] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:34:32,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:34:32,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [37] total 44 [2023-11-29 01:34:32,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233010442] [2023-11-29 01:34:32,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:32,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:34:32,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:34:32,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 01:34:32,909 INFO L87 Difference]: Start difference. First operand 536 states and 798 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:34:34,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:34,930 INFO L93 Difference]: Finished difference Result 1233 states and 1832 transitions. [2023-11-29 01:34:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:34:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 293 [2023-11-29 01:34:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:34,934 INFO L225 Difference]: With dead ends: 1233 [2023-11-29 01:34:34,935 INFO L226 Difference]: Without dead ends: 821 [2023-11-29 01:34:34,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=453, Invalid=1997, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 01:34:34,937 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 329 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:34,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 883 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:34:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2023-11-29 01:34:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 600. [2023-11-29 01:34:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 426 states have (on average 1.4014084507042253) internal successors, (597), 428 states have internal predecessors, (597), 152 states have call successors, (152), 21 states have call predecessors, (152), 21 states have return successors, (152), 150 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 01:34:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 901 transitions. [2023-11-29 01:34:35,095 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 901 transitions. Word has length 293 [2023-11-29 01:34:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:35,095 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 901 transitions. [2023-11-29 01:34:35,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:34:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 901 transitions. [2023-11-29 01:34:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 01:34:35,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:35,097 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:35,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 01:34:35,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:35,298 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:35,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:35,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1050994551, now seen corresponding path program 1 times [2023-11-29 01:34:35,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:35,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959105822] [2023-11-29 01:34:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:35,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:35,328 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:35,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890261590] [2023-11-29 01:34:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:35,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:35,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:35,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:35,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:34:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:35,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:34:35,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:34:35,539 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:35,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:35,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959105822] [2023-11-29 01:34:35,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:35,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890261590] [2023-11-29 01:34:35,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890261590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:35,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:35,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:34:35,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196631992] [2023-11-29 01:34:35,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:35,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:34:35,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:34:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:34:35,542 INFO L87 Difference]: Start difference. First operand 600 states and 901 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:34:35,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:35,835 INFO L93 Difference]: Finished difference Result 1081 states and 1634 transitions. [2023-11-29 01:34:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:34:35,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 293 [2023-11-29 01:34:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:35,840 INFO L225 Difference]: With dead ends: 1081 [2023-11-29 01:34:35,841 INFO L226 Difference]: Without dead ends: 614 [2023-11-29 01:34:35,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 290 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 01:34:35,843 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 160 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:35,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 505 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:34:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-11-29 01:34:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 610. [2023-11-29 01:34:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 436 states have (on average 1.4059633027522935) internal successors, (613), 438 states have internal predecessors, (613), 152 states have call successors, (152), 21 states have call predecessors, (152), 21 states have return successors, (152), 150 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 01:34:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 917 transitions. [2023-11-29 01:34:36,029 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 917 transitions. Word has length 293 [2023-11-29 01:34:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:36,030 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 917 transitions. [2023-11-29 01:34:36,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:34:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 917 transitions. [2023-11-29 01:34:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 01:34:36,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:36,033 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:36,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:34:36,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 01:34:36,234 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:36,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:36,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1189247226, now seen corresponding path program 1 times [2023-11-29 01:34:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:36,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392060609] [2023-11-29 01:34:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:36,265 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:36,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154615724] [2023-11-29 01:34:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:36,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:36,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:36,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:34:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:36,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:34:36,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 233 proven. 138 refuted. 0 times theorem prover too weak. 4141 trivial. 0 not checked. [2023-11-29 01:34:37,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:34:37,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:37,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392060609] [2023-11-29 01:34:37,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:37,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154615724] [2023-11-29 01:34:37,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154615724] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:34:37,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:34:37,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 10 [2023-11-29 01:34:37,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161315281] [2023-11-29 01:34:37,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:37,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:34:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:37,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:34:37,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:34:37,309 INFO L87 Difference]: Start difference. First operand 610 states and 917 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:34:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:37,535 INFO L93 Difference]: Finished difference Result 879 states and 1324 transitions. [2023-11-29 01:34:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:34:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 294 [2023-11-29 01:34:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:37,538 INFO L225 Difference]: With dead ends: 879 [2023-11-29 01:34:37,539 INFO L226 Difference]: Without dead ends: 622 [2023-11-29 01:34:37,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 577 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:34:37,540 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 180 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:37,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 558 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:34:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2023-11-29 01:34:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 615. [2023-11-29 01:34:37,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 441 states have (on average 1.3786848072562359) internal successors, (608), 443 states have internal predecessors, (608), 152 states have call successors, (152), 21 states have call predecessors, (152), 21 states have return successors, (152), 150 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 01:34:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 912 transitions. [2023-11-29 01:34:37,760 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 912 transitions. Word has length 294 [2023-11-29 01:34:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:37,760 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 912 transitions. [2023-11-29 01:34:37,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:34:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 912 transitions. [2023-11-29 01:34:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 01:34:37,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:37,763 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:37,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:34:37,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:34:37,964 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:37,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1974366427, now seen corresponding path program 1 times [2023-11-29 01:34:37,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:37,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612473739] [2023-11-29 01:34:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:37,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:37,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:37,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628041178] [2023-11-29 01:34:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:37,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:37,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:37,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:37,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:34:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:38,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 01:34:38,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 96 proven. 276 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-29 01:34:57,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:35:05,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:05,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612473739] [2023-11-29 01:35:05,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:05,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628041178] [2023-11-29 01:35:05,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628041178] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:35:05,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:35:05,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-29 01:35:05,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121789798] [2023-11-29 01:35:05,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:05,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:35:05,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:05,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:35:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-11-29 01:35:05,925 INFO L87 Difference]: Start difference. First operand 615 states and 912 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:35:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:07,430 INFO L93 Difference]: Finished difference Result 1276 states and 1885 transitions. [2023-11-29 01:35:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:35:07,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 294 [2023-11-29 01:35:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:07,435 INFO L225 Difference]: With dead ends: 1276 [2023-11-29 01:35:07,435 INFO L226 Difference]: Without dead ends: 794 [2023-11-29 01:35:07,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:35:07,436 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 402 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:07,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 829 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 01:35:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2023-11-29 01:35:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 637. [2023-11-29 01:35:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 463 states have (on average 1.3930885529157668) internal successors, (645), 465 states have internal predecessors, (645), 152 states have call successors, (152), 21 states have call predecessors, (152), 21 states have return successors, (152), 150 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 01:35:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 949 transitions. [2023-11-29 01:35:07,585 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 949 transitions. Word has length 294 [2023-11-29 01:35:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:07,585 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 949 transitions. [2023-11-29 01:35:07,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:35:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 949 transitions. [2023-11-29 01:35:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 01:35:07,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:07,587 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:07,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:35:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:35:07,788 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:07,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash 637244447, now seen corresponding path program 1 times [2023-11-29 01:35:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:07,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737384766] [2023-11-29 01:35:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:07,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:07,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:07,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898208947] [2023-11-29 01:35:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:07,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:07,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:07,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:07,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:35:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:08,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:35:08,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-29 01:35:08,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 01:35:09,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:09,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737384766] [2023-11-29 01:35:09,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:09,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898208947] [2023-11-29 01:35:09,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898208947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:35:09,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:35:09,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-29 01:35:09,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571784945] [2023-11-29 01:35:09,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:35:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:35:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:35:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:35:09,066 INFO L87 Difference]: Start difference. First operand 637 states and 949 transitions. Second operand has 15 states, 14 states have (on average 6.857142857142857) internal successors, (96), 15 states have internal predecessors, (96), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 01:35:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:10,433 INFO L93 Difference]: Finished difference Result 1447 states and 2148 transitions. [2023-11-29 01:35:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 01:35:10,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.857142857142857) internal successors, (96), 15 states have internal predecessors, (96), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 294 [2023-11-29 01:35:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:10,439 INFO L225 Difference]: With dead ends: 1447 [2023-11-29 01:35:10,439 INFO L226 Difference]: Without dead ends: 947 [2023-11-29 01:35:10,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 575 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:35:10,441 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1117 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:10,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1165 Valid, 1062 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:35:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-11-29 01:35:10,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 628. [2023-11-29 01:35:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 454 states have (on average 1.3898678414096917) internal successors, (631), 456 states have internal predecessors, (631), 152 states have call successors, (152), 21 states have call predecessors, (152), 21 states have return successors, (152), 150 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 01:35:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 935 transitions. [2023-11-29 01:35:10,620 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 935 transitions. Word has length 294 [2023-11-29 01:35:10,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:10,621 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 935 transitions. [2023-11-29 01:35:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.857142857142857) internal successors, (96), 15 states have internal predecessors, (96), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 01:35:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 935 transitions. [2023-11-29 01:35:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 01:35:10,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:10,624 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:10,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:35:10,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:35:10,826 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:10,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1530961142, now seen corresponding path program 1 times [2023-11-29 01:35:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545393247] [2023-11-29 01:35:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:10,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:10,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:10,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098531926] [2023-11-29 01:35:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:10,855 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:10,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:35:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:11,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:35:11,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:35:11,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:11,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545393247] [2023-11-29 01:35:11,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098531926] [2023-11-29 01:35:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098531926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:11,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:11,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:35:11,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523273800] [2023-11-29 01:35:11,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:11,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:35:11,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:11,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:35:11,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:35:11,052 INFO L87 Difference]: Start difference. First operand 628 states and 935 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:35:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:11,304 INFO L93 Difference]: Finished difference Result 1126 states and 1676 transitions. [2023-11-29 01:35:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:35:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 294 [2023-11-29 01:35:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:11,308 INFO L225 Difference]: With dead ends: 1126 [2023-11-29 01:35:11,308 INFO L226 Difference]: Without dead ends: 626 [2023-11-29 01:35:11,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 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 01:35:11,310 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 113 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:11,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 528 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:35:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-11-29 01:35:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 578. [2023-11-29 01:35:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 413 states have (on average 1.3849878934624698) internal successors, (572), 413 states have internal predecessors, (572), 144 states have call successors, (144), 20 states have call predecessors, (144), 20 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-29 01:35:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 860 transitions. [2023-11-29 01:35:11,455 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 860 transitions. Word has length 294 [2023-11-29 01:35:11,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:11,456 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 860 transitions. [2023-11-29 01:35:11,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:35:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 860 transitions. [2023-11-29 01:35:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 01:35:11,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:11,458 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:11,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:35:11,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:35:11,658 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:11,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:11,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1695630602, now seen corresponding path program 1 times [2023-11-29 01:35:11,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:11,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945689483] [2023-11-29 01:35:11,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:11,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:11,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:11,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137782984] [2023-11-29 01:35:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:11,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:11,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:11,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:11,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:35:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:11,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:35:11,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:35:20,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:20,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945689483] [2023-11-29 01:35:20,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:20,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137782984] [2023-11-29 01:35:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137782984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:20,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:20,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:35:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934062141] [2023-11-29 01:35:20,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:20,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:35:20,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:35:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:35:20,342 INFO L87 Difference]: Start difference. First operand 578 states and 860 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:35:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:21,379 INFO L93 Difference]: Finished difference Result 1209 states and 1802 transitions. [2023-11-29 01:35:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:35:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 294 [2023-11-29 01:35:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:21,383 INFO L225 Difference]: With dead ends: 1209 [2023-11-29 01:35:21,383 INFO L226 Difference]: Without dead ends: 763 [2023-11-29 01:35:21,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:35:21,385 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 258 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:21,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 974 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:35:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2023-11-29 01:35:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 648. [2023-11-29 01:35:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 483 states have (on average 1.4078674948240166) internal successors, (680), 483 states have internal predecessors, (680), 144 states have call successors, (144), 20 states have call predecessors, (144), 20 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-29 01:35:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 968 transitions. [2023-11-29 01:35:21,536 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 968 transitions. Word has length 294 [2023-11-29 01:35:21,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:21,537 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 968 transitions. [2023-11-29 01:35:21,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 9 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:35:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 968 transitions. [2023-11-29 01:35:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 01:35:21,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:21,540 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:21,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 01:35:21,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:35:21,741 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:21,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:21,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1880092628, now seen corresponding path program 1 times [2023-11-29 01:35:21,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:21,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608046595] [2023-11-29 01:35:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:21,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:21,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432237786] [2023-11-29 01:35:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:21,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:21,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:21,768 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:21,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:35:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:22,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 01:35:22,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1447 proven. 303 refuted. 0 times theorem prover too weak. 2762 trivial. 0 not checked. [2023-11-29 01:35:48,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:35:57,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:57,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608046595] [2023-11-29 01:35:57,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:57,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432237786] [2023-11-29 01:35:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432237786] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:35:57,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:35:57,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [23] total 31 [2023-11-29 01:35:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51072024] [2023-11-29 01:35:57,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:57,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:35:57,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:35:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:35:57,411 INFO L87 Difference]: Start difference. First operand 648 states and 968 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:36:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:00,887 INFO L93 Difference]: Finished difference Result 1306 states and 1948 transitions. [2023-11-29 01:36:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:36:00,888 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 01:36:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:00,892 INFO L225 Difference]: With dead ends: 1306 [2023-11-29 01:36:00,892 INFO L226 Difference]: Without dead ends: 1035 [2023-11-29 01:36:00,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 01:36:00,894 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 349 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:00,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 995 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 01:36:00,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2023-11-29 01:36:01,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 663. [2023-11-29 01:36:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 498 states have (on average 1.4136546184738956) internal successors, (704), 498 states have internal predecessors, (704), 144 states have call successors, (144), 20 states have call predecessors, (144), 20 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-29 01:36:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 992 transitions. [2023-11-29 01:36:01,050 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 992 transitions. Word has length 295 [2023-11-29 01:36:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:01,050 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 992 transitions. [2023-11-29 01:36:01,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:36:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 992 transitions. [2023-11-29 01:36:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 01:36:01,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:01,053 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:01,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:36:01,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:36:01,254 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:01,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash 74654294, now seen corresponding path program 1 times [2023-11-29 01:36:01,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:01,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560067656] [2023-11-29 01:36:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:01,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:01,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:01,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644346124] [2023-11-29 01:36:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:01,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:01,279 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:01,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:36:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:01,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:36:01,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 96 proven. 276 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-29 01:36:25,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 01:36:34,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:34,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560067656] [2023-11-29 01:36:34,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:34,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644346124] [2023-11-29 01:36:34,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644346124] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:34,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:36:34,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 22 [2023-11-29 01:36:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613815629] [2023-11-29 01:36:34,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:36:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:36:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:36:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:36:34,163 INFO L87 Difference]: Start difference. First operand 663 states and 992 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:36:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:41,541 INFO L93 Difference]: Finished difference Result 1117 states and 1649 transitions. [2023-11-29 01:36:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 01:36:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 01:36:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:41,546 INFO L225 Difference]: With dead ends: 1117 [2023-11-29 01:36:41,546 INFO L226 Difference]: Without dead ends: 843 [2023-11-29 01:36:41,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 01:36:41,547 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 579 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:41,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1115 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 01:36:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2023-11-29 01:36:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 648. [2023-11-29 01:36:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 483 states have (on average 1.4078674948240166) internal successors, (680), 483 states have internal predecessors, (680), 144 states have call successors, (144), 20 states have call predecessors, (144), 20 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2023-11-29 01:36:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 968 transitions. [2023-11-29 01:36:41,694 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 968 transitions. Word has length 295 [2023-11-29 01:36:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:41,695 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 968 transitions. [2023-11-29 01:36:41,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 01:36:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 968 transitions. [2023-11-29 01:36:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-29 01:36:41,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:41,696 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:41,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:36:41,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:36:41,897 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:41,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash -902535091, now seen corresponding path program 1 times [2023-11-29 01:36:41,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:41,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101356507] [2023-11-29 01:36:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:41,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:41,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:41,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868051113] [2023-11-29 01:36:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:41,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:41,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:41,929 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:41,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03f80541-a5b8-4290-be3a-e593497fbdba/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:36:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:42,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 01:36:42,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1229 proven. 252 refuted. 0 times theorem prover too weak. 3031 trivial. 0 not checked. [2023-11-29 01:38:19,492 INFO L327 TraceCheckSpWp]: Computing backward predicates...