./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-44.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_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/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_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-44.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/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_f3e2279b-e111-4249-9536-e11b8fdd85bd/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 52bbdb7a41796c9d1c42151e2a189c74de125cfeae86983365ab22d3ff48a0ac --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:34:51,967 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:34:52,028 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 20:34:52,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:34:52,034 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:34:52,057 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:34:52,058 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:34:52,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:34:52,059 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:34:52,060 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:34:52,060 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:34:52,061 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:34:52,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:34:52,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:34:52,063 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:34:52,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:34:52,064 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 20:34:52,064 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:34:52,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:34:52,065 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:34:52,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:34:52,066 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 20:34:52,067 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:34:52,067 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 20:34:52,068 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:34:52,068 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 20:34:52,069 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:34:52,069 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:34:52,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:34:52,070 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:34:52,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:34:52,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:34:52,071 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:34:52,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:34:52,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 20:34:52,072 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:34:52,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:34:52,072 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:34:52,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:34:52,073 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 20:34:52,073 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:34:52,073 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:34:52,073 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_f3e2279b-e111-4249-9536-e11b8fdd85bd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52bbdb7a41796c9d1c42151e2a189c74de125cfeae86983365ab22d3ff48a0ac [2023-11-28 20:34:52,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:34:52,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:34:52,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:34:52,313 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:34:52,313 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:34:52,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-44.i [2023-11-28 20:34:55,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:34:55,247 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:34:55,247 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-44.i [2023-11-28 20:34:55,254 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/data/9fc32a279/1099341a08d944bfa3a957a3866e22ba/FLAG3bfa48fc8 [2023-11-28 20:34:55,267 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/data/9fc32a279/1099341a08d944bfa3a957a3866e22ba [2023-11-28 20:34:55,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:34:55,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:34:55,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:34:55,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:34:55,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:34:55,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1354438e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55, skipping insertion in model container [2023-11-28 20:34:55,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,306 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:34:55,428 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_f3e2279b-e111-4249-9536-e11b8fdd85bd/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-44.i[915,928] [2023-11-28 20:34:55,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:34:55,478 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:34:55,491 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_f3e2279b-e111-4249-9536-e11b8fdd85bd/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-44.i[915,928] [2023-11-28 20:34:55,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:34:55,527 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:34:55,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55 WrapperNode [2023-11-28 20:34:55,527 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:34:55,528 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:34:55,528 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:34:55,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:34:55,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,582 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 130 [2023-11-28 20:34:55,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:34:55,584 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:34:55,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:34:55,584 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:34:55,594 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,598 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,613 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]. [2023-11-28 20:34:55,614 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,614 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,621 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,629 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,633 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:34:55,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:34:55,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:34:55,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:34:55,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (1/1) ... [2023-11-28 20:34:55,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:34:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:55,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:34:55,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:34:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:34:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-28 20:34:55,693 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-28 20:34:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 20:34:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:34:55,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:34:55,759 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:34:55,761 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:34:56,016 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:34:56,044 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:34:56,044 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-28 20:34:56,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:34:56 BoogieIcfgContainer [2023-11-28 20:34:56,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:34:56,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:34:56,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:34:56,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:34:56,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:34:55" (1/3) ... [2023-11-28 20:34:56,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db39435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:34:56, skipping insertion in model container [2023-11-28 20:34:56,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:55" (2/3) ... [2023-11-28 20:34:56,053 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db39435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:34:56, skipping insertion in model container [2023-11-28 20:34:56,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:34:56" (3/3) ... [2023-11-28 20:34:56,055 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-44.i [2023-11-28 20:34:56,074 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:34:56,075 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-28 20:34:56,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:34:56,130 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;@17fb09b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:34:56,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-28 20:34:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 32 states have internal predecessors, (43), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-28 20:34:56,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:34:56,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:56,150 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:56,150 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash 318110618, now seen corresponding path program 1 times [2023-11-28 20:34:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:56,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385574007] [2023-11-28 20:34:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:56,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:34:56,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385574007] [2023-11-28 20:34:56,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-28 20:34:56,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589662514] [2023-11-28 20:34:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:56,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:56,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:56,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:56,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:34:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:56,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-28 20:34:56,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2023-11-28 20:34:56,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:34:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589662514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:34:56,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:34:56,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:34:56,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407907429] [2023-11-28 20:34:56,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:56,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 20:34:56,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:34:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 20:34:56,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:34:56,629 INFO L87 Difference]: Start difference. First operand has 55 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 32 states have internal predecessors, (43), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-28 20:34:56,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:34:56,667 INFO L93 Difference]: Finished difference Result 107 states and 189 transitions. [2023-11-28 20:34:56,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 20:34:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) Word has length 128 [2023-11-28 20:34:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:34:56,677 INFO L225 Difference]: With dead ends: 107 [2023-11-28 20:34:56,677 INFO L226 Difference]: Without dead ends: 53 [2023-11-28 20:34:56,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 20:34:56,685 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:34:56,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:34:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-28 20:34:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-28 20:34:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-28 20:34:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 80 transitions. [2023-11-28 20:34:56,729 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 80 transitions. Word has length 128 [2023-11-28 20:34:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:34:56,730 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 80 transitions. [2023-11-28 20:34:56,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-28 20:34:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 80 transitions. [2023-11-28 20:34:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:34:56,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:34:56,734 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:56,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:34:56,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-28 20:34:56,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:34:56,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1762825000, now seen corresponding path program 1 times [2023-11-28 20:34:56,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:34:56,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062583072] [2023-11-28 20:34:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:56,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:34:57,000 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:34:57,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504085919] [2023-11-28 20:34:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:57,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:34:57,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:57,002 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:34:57,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:34:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:57,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:34:57,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 464 proven. 129 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-11-28 20:35:03,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-28 20:35:06,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:06,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062583072] [2023-11-28 20:35:06,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:06,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504085919] [2023-11-28 20:35:06,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504085919] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:06,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:06,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [20] total 25 [2023-11-28 20:35:06,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251400951] [2023-11-28 20:35:06,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:06,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:35:06,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:35:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-11-28 20:35:06,743 INFO L87 Difference]: Start difference. First operand 53 states and 80 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:35:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:09,144 INFO L93 Difference]: Finished difference Result 141 states and 205 transitions. [2023-11-28 20:35:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:35:09,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 128 [2023-11-28 20:35:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:09,148 INFO L225 Difference]: With dead ends: 141 [2023-11-28 20:35:09,148 INFO L226 Difference]: Without dead ends: 89 [2023-11-28 20:35:09,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2023-11-28 20:35:09,151 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 161 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:09,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 291 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 20:35:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-28 20:35:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2023-11-28 20:35:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 25 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-28 20:35:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2023-11-28 20:35:09,173 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 128 [2023-11-28 20:35:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:09,174 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2023-11-28 20:35:09,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:35:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2023-11-28 20:35:09,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-28 20:35:09,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:09,177 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:09,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-28 20:35:09,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:09,378 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:09,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1722795670, now seen corresponding path program 1 times [2023-11-28 20:35:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:09,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145079352] [2023-11-28 20:35:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:09,412 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:09,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054509545] [2023-11-28 20:35:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:09,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:09,414 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:09,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:35:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:09,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-28 20:35:09,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 539 proven. 147 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-11-28 20:35:13,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-28 20:35:17,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145079352] [2023-11-28 20:35:17,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:17,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054509545] [2023-11-28 20:35:17,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054509545] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:17,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:17,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [21] total 26 [2023-11-28 20:35:17,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80653937] [2023-11-28 20:35:17,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:17,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:35:17,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:17,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:35:17,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:35:17,324 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:35:19,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:19,982 INFO L93 Difference]: Finished difference Result 153 states and 216 transitions. [2023-11-28 20:35:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 20:35:19,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 128 [2023-11-28 20:35:19,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:19,985 INFO L225 Difference]: With dead ends: 153 [2023-11-28 20:35:19,985 INFO L226 Difference]: Without dead ends: 92 [2023-11-28 20:35:19,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2023-11-28 20:35:19,987 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 91 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:19,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 254 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-28 20:35:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-28 20:35:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2023-11-28 20:35:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 44 states have internal predecessors, (53), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-28 20:35:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 103 transitions. [2023-11-28 20:35:20,009 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 103 transitions. Word has length 128 [2023-11-28 20:35:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:20,010 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 103 transitions. [2023-11-28 20:35:20,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:35:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 103 transitions. [2023-11-28 20:35:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-28 20:35:20,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:20,013 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:20,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:35:20,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:20,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:20,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash 674656796, now seen corresponding path program 1 times [2023-11-28 20:35:20,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:20,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576394416] [2023-11-28 20:35:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:20,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:20,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:20,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865171777] [2023-11-28 20:35:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:20,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:20,258 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:20,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:35:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:20,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:35:20,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-28 20:35:22,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:22,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576394416] [2023-11-28 20:35:22,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865171777] [2023-11-28 20:35:22,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865171777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:22,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:22,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 20:35:22,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116632677] [2023-11-28 20:35:22,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:22,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:35:22,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:22,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:35:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:35:22,910 INFO L87 Difference]: Start difference. First operand 72 states and 103 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:35:24,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:24,366 INFO L93 Difference]: Finished difference Result 206 states and 284 transitions. [2023-11-28 20:35:24,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:35:24,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 129 [2023-11-28 20:35:24,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:35:24,369 INFO L225 Difference]: With dead ends: 206 [2023-11-28 20:35:24,369 INFO L226 Difference]: Without dead ends: 141 [2023-11-28 20:35:24,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:35:24,371 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 122 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:35:24,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 371 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-28 20:35:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-28 20:35:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2023-11-28 20:35:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-28 20:35:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2023-11-28 20:35:24,406 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 129 [2023-11-28 20:35:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:35:24,407 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2023-11-28 20:35:24,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:35:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2023-11-28 20:35:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-28 20:35:24,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:35:24,409 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:24,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 20:35:24,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:24,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:35:24,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1354715166, now seen corresponding path program 1 times [2023-11-28 20:35:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:35:24,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143960179] [2023-11-28 20:35:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:24,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:35:24,634 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:35:24,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744557998] [2023-11-28 20:35:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:35:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:35:24,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:35:24,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-28 20:35:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:24,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-28 20:35:24,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 472 proven. 96 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-28 20:35:31,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-28 20:35:47,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:35:47,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143960179] [2023-11-28 20:35:47,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:35:47,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744557998] [2023-11-28 20:35:47,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744557998] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:35:47,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:35:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 25 [2023-11-28 20:35:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887807477] [2023-11-28 20:35:47,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:35:47,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:35:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:35:47,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=467, Unknown=3, NotChecked=0, Total=600 [2023-11-28 20:35:47,163 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:35:52,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-28 20:35:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:35:59,998 INFO L93 Difference]: Finished difference Result 215 states and 294 transitions. [2023-11-28 20:35:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 20:35:59,999 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 129 [2023-11-28 20:36:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:00,002 INFO L225 Difference]: With dead ends: 215 [2023-11-28 20:36:00,002 INFO L226 Difference]: Without dead ends: 147 [2023-11-28 20:36:00,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=207, Invalid=846, Unknown=3, NotChecked=0, Total=1056 [2023-11-28 20:36:00,004 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 72 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:00,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 396 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 288 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2023-11-28 20:36:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-28 20:36:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2023-11-28 20:36:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-28 20:36:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2023-11-28 20:36:00,051 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 129 [2023-11-28 20:36:00,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:00,052 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2023-11-28 20:36:00,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:36:00,052 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2023-11-28 20:36:00,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-28 20:36:00,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:00,054 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:00,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-28 20:36:00,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:00,255 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:00,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash 545368540, now seen corresponding path program 1 times [2023-11-28 20:36:00,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:00,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734811886] [2023-11-28 20:36:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:00,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:00,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477177178] [2023-11-28 20:36:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:00,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:00,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:00,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-28 20:36:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:00,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:36:00,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 524 proven. 111 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-11-28 20:36:07,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-28 20:36:23,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734811886] [2023-11-28 20:36:23,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477177178] [2023-11-28 20:36:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477177178] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:23,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:23,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [21] total 27 [2023-11-28 20:36:23,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925693359] [2023-11-28 20:36:23,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:23,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:36:23,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:23,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:36:23,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=559, Unknown=3, NotChecked=0, Total=702 [2023-11-28 20:36:23,227 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:36:33,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-28 20:36:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:36:36,370 INFO L93 Difference]: Finished difference Result 181 states and 254 transitions. [2023-11-28 20:36:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:36:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 129 [2023-11-28 20:36:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:36:36,372 INFO L225 Difference]: With dead ends: 181 [2023-11-28 20:36:36,372 INFO L226 Difference]: Without dead ends: 112 [2023-11-28 20:36:36,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=196, Invalid=923, Unknown=3, NotChecked=0, Total=1122 [2023-11-28 20:36:36,374 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 107 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:36:36,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 315 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 317 Invalid, 1 Unknown, 0 Unchecked, 10.2s Time] [2023-11-28 20:36:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-28 20:36:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2023-11-28 20:36:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-28 20:36:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2023-11-28 20:36:36,408 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 129 [2023-11-28 20:36:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:36:36,408 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2023-11-28 20:36:36,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:36:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2023-11-28 20:36:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-28 20:36:36,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:36:36,410 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:36,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-28 20:36:36,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:36,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:36:36,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:36,611 INFO L85 PathProgramCache]: Analyzing trace with hash 932822234, now seen corresponding path program 1 times [2023-11-28 20:36:36,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:36:36,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142259456] [2023-11-28 20:36:36,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:36,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:36:36,630 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:36:36,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737938153] [2023-11-28 20:36:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:36,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:36:36,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:36:36,631 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:36:36,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-28 20:36:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:36,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 20:36:36,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 472 proven. 96 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-28 20:36:37,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-28 20:36:42,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:36:42,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142259456] [2023-11-28 20:36:42,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:36:42,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737938153] [2023-11-28 20:36:42,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737938153] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 20:36:42,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:36:42,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 24 [2023-11-28 20:36:42,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470676032] [2023-11-28 20:36:42,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:42,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-28 20:36:42,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:36:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-28 20:36:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2023-11-28 20:36:42,433 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:36:51,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-28 20:36:56,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.29s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-28 20:36:58,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-28 20:37:00,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-28 20:37:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:37:02,671 INFO L93 Difference]: Finished difference Result 239 states and 324 transitions. [2023-11-28 20:37:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 20:37:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 129 [2023-11-28 20:37:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:37:02,673 INFO L225 Difference]: With dead ends: 239 [2023-11-28 20:37:02,673 INFO L226 Difference]: Without dead ends: 171 [2023-11-28 20:37:02,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 20:37:02,675 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 176 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:37:02,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 435 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 301 Invalid, 1 Unknown, 0 Unchecked, 14.0s Time] [2023-11-28 20:37:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-28 20:37:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 83. [2023-11-28 20:37:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-28 20:37:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2023-11-28 20:37:02,708 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 129 [2023-11-28 20:37:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:37:02,708 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2023-11-28 20:37:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:37:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2023-11-28 20:37:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-28 20:37:02,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:37:02,710 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:37:02,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-28 20:37:02,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:37:02,911 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:37:02,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:37:02,911 INFO L85 PathProgramCache]: Analyzing trace with hash 123475608, now seen corresponding path program 1 times [2023-11-28 20:37:02,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:37:02,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358564888] [2023-11-28 20:37:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:37:02,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:37:02,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:37:02,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003548380] [2023-11-28 20:37:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:37:02,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:37:02,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:37:02,927 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:37:02,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-28 20:37:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:37:03,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 20:37:03,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:37:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-11-28 20:37:03,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:37:03,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:37:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358564888] [2023-11-28 20:37:03,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-28 20:37:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003548380] [2023-11-28 20:37:03,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003548380] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:37:03,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:37:03,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 20:37:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035675295] [2023-11-28 20:37:03,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:37:03,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:37:03,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:37:03,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:37:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:37:03,414 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:37:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:37:04,685 INFO L93 Difference]: Finished difference Result 208 states and 285 transitions. [2023-11-28 20:37:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:37:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) Word has length 129 [2023-11-28 20:37:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:37:04,687 INFO L225 Difference]: With dead ends: 208 [2023-11-28 20:37:04,687 INFO L226 Difference]: Without dead ends: 140 [2023-11-28 20:37:04,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:37:04,688 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 122 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:37:04,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 420 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 20:37:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-28 20:37:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 75. [2023-11-28 20:37:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 43 states have internal predecessors, (49), 28 states have call successors, (28), 4 states have call predecessors, (28), 4 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-28 20:37:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2023-11-28 20:37:04,715 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 129 [2023-11-28 20:37:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:37:04,716 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2023-11-28 20:37:04,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 1 states have call predecessors, (21), 1 states have call successors, (21) [2023-11-28 20:37:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2023-11-28 20:37:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-28 20:37:04,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:37:04,717 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:37:04,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-28 20:37:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:37:04,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-28 20:37:04,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:37:04,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2101820157, now seen corresponding path program 1 times [2023-11-28 20:37:04,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:37:04,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726269277] [2023-11-28 20:37:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:37:04,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:37:04,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-28 20:37:04,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582835218] [2023-11-28 20:37:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:37:04,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:37:04,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:37:04,939 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:37:04,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3e2279b-e111-4249-9536-e11b8fdd85bd/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-28 20:37:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:37:05,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-28 20:37:05,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:39:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 335 proven. 87 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2023-11-28 20:39:42,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:40:07,999 WARN L293 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:41:01,990 WARN L293 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:41:25,175 WARN L293 SmtUtils]: Spent 6.56s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:41:37,348 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:42:31,596 WARN L293 SmtUtils]: Spent 34.33s on a formula simplification. DAG size of input: 73 DAG size of output: 66 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:42:37,671 WARN L293 SmtUtils]: Spent 5.91s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:43:14,496 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:43:24,805 WARN L293 SmtUtils]: Spent 5.82s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:44:29,543 WARN L293 SmtUtils]: Spent 50.69s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:44:58,034 WARN L293 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:45:24,876 WARN L293 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:46:09,461 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:46:27,736 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:46:40,034 WARN L293 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:47:07,171 WARN L293 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:47:15,177 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:47:20,754 WARN L293 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:47:28,762 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:48:07,729 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:48:15,736 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:48:27,898 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:48:40,454 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:48:56,474 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:49:04,481 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:49:25,867 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:49:41,889 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:49:49,896 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:49:57,903 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)