./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/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_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/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_08bb9087-da48-4793-bdea-609edb06d555/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 0cc8a0783ec7e65aec5bb1b8ce7f7837d17a7d27f4f67ff4962ce15c1b498ac3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:53:56,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:53:56,149 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:53:56,155 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:53:56,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:53:56,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:53:56,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:53:56,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:53:56,182 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:53:56,182 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:53:56,183 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:53:56,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:53:56,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:53:56,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:53:56,185 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:53:56,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:53:56,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:53:56,187 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:53:56,187 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:53:56,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:53:56,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:53:56,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:53:56,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:53:56,190 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:53:56,190 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:53:56,191 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:53:56,191 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:53:56,191 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:53:56,192 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:53:56,192 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:53:56,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:53:56,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:53:56,193 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:53:56,193 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:53:56,194 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:53:56,194 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:53:56,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:53:56,194 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:53:56,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:53:56,195 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:53:56,195 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:53:56,195 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:53:56,195 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_08bb9087-da48-4793-bdea-609edb06d555/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cc8a0783ec7e65aec5bb1b8ce7f7837d17a7d27f4f67ff4962ce15c1b498ac3 [2023-11-29 05:53:56,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:53:56,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:53:56,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:53:56,414 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:53:56,415 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:53:56,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i [2023-11-29 05:53:59,202 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:53:59,392 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:53:59,392 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i [2023-11-29 05:53:59,402 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/data/4948be130/7f50085404fd4c418b4d7a40b0535a9b/FLAG1a4498b82 [2023-11-29 05:53:59,417 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/data/4948be130/7f50085404fd4c418b4d7a40b0535a9b [2023-11-29 05:53:59,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:53:59,421 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:53:59,422 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:53:59,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:53:59,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:53:59,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4769a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59, skipping insertion in model container [2023-11-29 05:53:59,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,469 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:53:59,598 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_08bb9087-da48-4793-bdea-609edb06d555/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i[916,929] [2023-11-29 05:53:59,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:53:59,696 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:53:59,707 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_08bb9087-da48-4793-bdea-609edb06d555/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_100-while_file-26.i[916,929] [2023-11-29 05:53:59,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:53:59,766 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:53:59,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59 WrapperNode [2023-11-29 05:53:59,766 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:53:59,767 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:53:59,768 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:53:59,768 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:53:59,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,831 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 229 [2023-11-29 05:53:59,832 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:53:59,833 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:53:59,833 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:53:59,833 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:53:59,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,849 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,875 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 05:53:59,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,896 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:53:59,913 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:53:59,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:53:59,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:53:59,914 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (1/1) ... [2023-11-29 05:53:59,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:53:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:59,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:53:59,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:53:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:53:59,975 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 05:53:59,976 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 05:53:59,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:53:59,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:53:59,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:54:00,063 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:54:00,066 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:54:00,503 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:54:00,535 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:54:00,535 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:54:00,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:54:00 BoogieIcfgContainer [2023-11-29 05:54:00,536 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:54:00,538 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:54:00,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:54:00,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:54:00,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:53:59" (1/3) ... [2023-11-29 05:54:00,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43654754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:54:00, skipping insertion in model container [2023-11-29 05:54:00,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:53:59" (2/3) ... [2023-11-29 05:54:00,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43654754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:54:00, skipping insertion in model container [2023-11-29 05:54:00,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:54:00" (3/3) ... [2023-11-29 05:54:00,545 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-while_file-26.i [2023-11-29 05:54:00,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:54:00,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:54:00,615 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:54:00,622 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;@17e29b67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:54:00,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:54:00,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 62 states have internal predecessors, (91), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 05:54:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-29 05:54:00,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:54:00,641 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:00,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:54:00,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash 228631936, now seen corresponding path program 1 times [2023-11-29 05:54:00,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:00,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858665474] [2023-11-29 05:54:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:00,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:00,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:00,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858665474] [2023-11-29 05:54:00,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 05:54:00,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302287931] [2023-11-29 05:54:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:00,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:00,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:00,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:00,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:54:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:01,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 05:54:01,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2023-11-29 05:54:01,151 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:54:01,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302287931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:01,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:01,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:54:01,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704581394] [2023-11-29 05:54:01,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:01,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:54:01,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:54:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:54:01,191 INFO L87 Difference]: Start difference. First operand has 94 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 62 states have internal predecessors, (91), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-29 05:54:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:54:01,238 INFO L93 Difference]: Finished difference Result 185 states and 330 transitions. [2023-11-29 05:54:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:54:01,240 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) Word has length 193 [2023-11-29 05:54:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:54:01,248 INFO L225 Difference]: With dead ends: 185 [2023-11-29 05:54:01,249 INFO L226 Difference]: Without dead ends: 92 [2023-11-29 05:54:01,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:54:01,256 INFO L413 NwaCegarLoop]: 143 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, 143 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 [2023-11-29 05:54:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 143 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:54:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-29 05:54:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-11-29 05:54:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 05:54:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 146 transitions. [2023-11-29 05:54:01,305 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 146 transitions. Word has length 193 [2023-11-29 05:54:01,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:54:01,305 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 146 transitions. [2023-11-29 05:54:01,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-29 05:54:01,306 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 146 transitions. [2023-11-29 05:54:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2023-11-29 05:54:01,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:54:01,312 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:01,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:54:01,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:01,513 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:54:01,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:01,514 INFO L85 PathProgramCache]: Analyzing trace with hash -728940540, now seen corresponding path program 1 times [2023-11-29 05:54:01,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:01,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908290772] [2023-11-29 05:54:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:01,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:01,583 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:54:01,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745487611] [2023-11-29 05:54:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:01,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:01,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:01,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:01,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:54:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:01,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:54:01,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:01,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 05:54:01,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:54:01,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:01,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908290772] [2023-11-29 05:54:01,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:54:01,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745487611] [2023-11-29 05:54:01,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745487611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:01,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:01,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:54:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115768626] [2023-11-29 05:54:01,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:01,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:54:01,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:01,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:54:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:54:01,846 INFO L87 Difference]: Start difference. First operand 92 states and 146 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-29 05:54:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:54:02,048 INFO L93 Difference]: Finished difference Result 269 states and 427 transitions. [2023-11-29 05:54:02,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:54:02,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 193 [2023-11-29 05:54:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:54:02,054 INFO L225 Difference]: With dead ends: 269 [2023-11-29 05:54:02,054 INFO L226 Difference]: Without dead ends: 178 [2023-11-29 05:54:02,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:54:02,057 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 126 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:54:02,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 325 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:54:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-29 05:54:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 110. [2023-11-29 05:54:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.4743589743589745) internal successors, (115), 78 states have internal predecessors, (115), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-29 05:54:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 175 transitions. [2023-11-29 05:54:02,080 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 175 transitions. Word has length 193 [2023-11-29 05:54:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:54:02,082 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 175 transitions. [2023-11-29 05:54:02,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-29 05:54:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 175 transitions. [2023-11-29 05:54:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-29 05:54:02,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:54:02,087 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:02,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:54:02,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:02,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:54:02,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1712222014, now seen corresponding path program 1 times [2023-11-29 05:54:02,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:02,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795324380] [2023-11-29 05:54:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:02,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:02,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:54:02,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495626822] [2023-11-29 05:54:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:02,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:02,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:02,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:02,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:54:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:02,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:54:02,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 29 proven. 87 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-11-29 05:54:02,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2023-11-29 05:54:03,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795324380] [2023-11-29 05:54:03,267 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:54:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495626822] [2023-11-29 05:54:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495626822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:03,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:54:03,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 05:54:03,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225400500] [2023-11-29 05:54:03,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:03,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:54:03,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:03,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:54:03,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:54:03,271 INFO L87 Difference]: Start difference. First operand 110 states and 175 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 3 states have call successors, (59), 2 states have call predecessors, (59), 4 states have return successors, (60), 2 states have call predecessors, (60), 3 states have call successors, (60) [2023-11-29 05:54:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:54:03,734 INFO L93 Difference]: Finished difference Result 281 states and 437 transitions. [2023-11-29 05:54:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:54:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 3 states have call successors, (59), 2 states have call predecessors, (59), 4 states have return successors, (60), 2 states have call predecessors, (60), 3 states have call successors, (60) Word has length 194 [2023-11-29 05:54:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:54:03,738 INFO L225 Difference]: With dead ends: 281 [2023-11-29 05:54:03,738 INFO L226 Difference]: Without dead ends: 172 [2023-11-29 05:54:03,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:54:03,741 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 155 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:54:03,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 413 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:54:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-29 05:54:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 167. [2023-11-29 05:54:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 128 states have (on average 1.4453125) internal successors, (185), 129 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-29 05:54:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 253 transitions. [2023-11-29 05:54:03,764 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 253 transitions. Word has length 194 [2023-11-29 05:54:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:54:03,766 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 253 transitions. [2023-11-29 05:54:03,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 3 states have call successors, (59), 2 states have call predecessors, (59), 4 states have return successors, (60), 2 states have call predecessors, (60), 3 states have call successors, (60) [2023-11-29 05:54:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 253 transitions. [2023-11-29 05:54:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-29 05:54:03,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:54:03,770 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:03,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:54:03,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-29 05:54:03,971 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:54:03,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash 994397380, now seen corresponding path program 1 times [2023-11-29 05:54:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:03,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250961253] [2023-11-29 05:54:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:04,014 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:54:04,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772370776] [2023-11-29 05:54:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:04,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:04,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:04,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:04,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:54:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:04,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:54:04,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 857 proven. 33 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2023-11-29 05:54:04,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 54 proven. 33 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2023-11-29 05:54:04,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:04,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250961253] [2023-11-29 05:54:04,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:54:04,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772370776] [2023-11-29 05:54:04,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772370776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:04,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:54:04,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 05:54:04,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083604706] [2023-11-29 05:54:04,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:04,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:54:04,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:04,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:54:04,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:54:04,605 INFO L87 Difference]: Start difference. First operand 167 states and 253 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-29 05:54:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:54:05,883 INFO L93 Difference]: Finished difference Result 749 states and 1130 transitions. [2023-11-29 05:54:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:54:05,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 194 [2023-11-29 05:54:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:54:05,891 INFO L225 Difference]: With dead ends: 749 [2023-11-29 05:54:05,891 INFO L226 Difference]: Without dead ends: 583 [2023-11-29 05:54:05,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 05:54:05,893 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 611 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:54:05,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 777 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:54:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-11-29 05:54:05,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 339. [2023-11-29 05:54:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 260 states have (on average 1.4307692307692308) internal successors, (372), 262 states have internal predecessors, (372), 68 states have call successors, (68), 10 states have call predecessors, (68), 10 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 05:54:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 508 transitions. [2023-11-29 05:54:05,950 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 508 transitions. Word has length 194 [2023-11-29 05:54:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:54:05,951 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 508 transitions. [2023-11-29 05:54:05,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 3 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-29 05:54:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 508 transitions. [2023-11-29 05:54:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-29 05:54:05,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:54:05,955 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:05,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:54:06,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:06,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:54:06,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash -694546362, now seen corresponding path program 1 times [2023-11-29 05:54:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:06,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875174741] [2023-11-29 05:54:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:06,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:54:06,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425904347] [2023-11-29 05:54:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:06,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:06,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:06,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:06,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:54:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:06,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:54:06,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 1034 proven. 84 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2023-11-29 05:54:06,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 84 proven. 87 refuted. 0 times theorem prover too weak. 1569 trivial. 0 not checked. [2023-11-29 05:54:07,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:07,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875174741] [2023-11-29 05:54:07,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:54:07,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425904347] [2023-11-29 05:54:07,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425904347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:07,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:54:07,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2023-11-29 05:54:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836652913] [2023-11-29 05:54:07,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:07,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:54:07,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:54:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:54:07,131 INFO L87 Difference]: Start difference. First operand 339 states and 508 transitions. Second operand has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 3 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-29 05:54:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:54:08,430 INFO L93 Difference]: Finished difference Result 1000 states and 1452 transitions. [2023-11-29 05:54:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 05:54:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 3 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) Word has length 194 [2023-11-29 05:54:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:54:08,436 INFO L225 Difference]: With dead ends: 1000 [2023-11-29 05:54:08,437 INFO L226 Difference]: Without dead ends: 662 [2023-11-29 05:54:08,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 374 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=584, Invalid=1768, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 05:54:08,440 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 397 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:54:08,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 749 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 05:54:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-11-29 05:54:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 287. [2023-11-29 05:54:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 204 states have (on average 1.3088235294117647) internal successors, (267), 206 states have internal predecessors, (267), 68 states have call successors, (68), 14 states have call predecessors, (68), 14 states have return successors, (68), 66 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-29 05:54:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 403 transitions. [2023-11-29 05:54:08,498 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 403 transitions. Word has length 194 [2023-11-29 05:54:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:54:08,499 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 403 transitions. [2023-11-29 05:54:08,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.25) internal successors, (84), 16 states have internal predecessors, (84), 3 states have call successors, (53), 3 states have call predecessors, (53), 7 states have return successors, (54), 3 states have call predecessors, (54), 3 states have call successors, (54) [2023-11-29 05:54:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 403 transitions. [2023-11-29 05:54:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-29 05:54:08,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:54:08,502 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:08,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:54:08,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:08,702 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:54:08,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:08,703 INFO L85 PathProgramCache]: Analyzing trace with hash 28931626, now seen corresponding path program 1 times [2023-11-29 05:54:08,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:08,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117825888] [2023-11-29 05:54:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:08,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:08,738 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:54:08,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088191862] [2023-11-29 05:54:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:08,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:08,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:08,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:54:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:08,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:54:08,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2023-11-29 05:54:09,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:54:09,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:09,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117825888] [2023-11-29 05:54:09,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:54:09,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088191862] [2023-11-29 05:54:09,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088191862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:54:09,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:54:09,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:54:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694386274] [2023-11-29 05:54:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:54:09,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:54:09,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:54:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:54:09,072 INFO L87 Difference]: Start difference. First operand 287 states and 403 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-29 05:54:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:54:09,288 INFO L93 Difference]: Finished difference Result 757 states and 1063 transitions. [2023-11-29 05:54:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:54:09,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) Word has length 195 [2023-11-29 05:54:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:54:09,293 INFO L225 Difference]: With dead ends: 757 [2023-11-29 05:54:09,294 INFO L226 Difference]: Without dead ends: 471 [2023-11-29 05:54:09,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:54:09,296 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 129 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:54:09,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 512 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:54:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-29 05:54:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 429. [2023-11-29 05:54:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 305 states have (on average 1.3049180327868852) internal successors, (398), 308 states have internal predecessors, (398), 102 states have call successors, (102), 21 states have call predecessors, (102), 21 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-29 05:54:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 602 transitions. [2023-11-29 05:54:09,375 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 602 transitions. Word has length 195 [2023-11-29 05:54:09,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:54:09,376 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 602 transitions. [2023-11-29 05:54:09,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 1 states have call predecessors, (30), 1 states have call successors, (30) [2023-11-29 05:54:09,376 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 602 transitions. [2023-11-29 05:54:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-29 05:54:09,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:54:09,379 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:09,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:54:09,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:09,580 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:54:09,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash 169480236, now seen corresponding path program 1 times [2023-11-29 05:54:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:09,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545925830] [2023-11-29 05:54:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:09,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:09,608 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:54:09,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024693172] [2023-11-29 05:54:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:09,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:09,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:09,610 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:09,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:54:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:09,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:54:09,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 950 proven. 36 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2023-11-29 05:54:10,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 132 proven. 39 refuted. 0 times theorem prover too weak. 1569 trivial. 0 not checked. [2023-11-29 05:54:10,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545925830] [2023-11-29 05:54:10,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:54:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024693172] [2023-11-29 05:54:10,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024693172] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:54:10,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:54:10,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2023-11-29 05:54:10,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227387516] [2023-11-29 05:54:10,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:10,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:54:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:54:10,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:54:10,686 INFO L87 Difference]: Start difference. First operand 429 states and 602 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 6 states have call successors, (60), 4 states have call predecessors, (60), 8 states have return successors, (60), 6 states have call predecessors, (60), 6 states have call successors, (60) [2023-11-29 05:54:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:54:12,943 INFO L93 Difference]: Finished difference Result 1875 states and 2626 transitions. [2023-11-29 05:54:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 05:54:12,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 6 states have call successors, (60), 4 states have call predecessors, (60), 8 states have return successors, (60), 6 states have call predecessors, (60), 6 states have call successors, (60) Word has length 195 [2023-11-29 05:54:12,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:54:12,956 INFO L225 Difference]: With dead ends: 1875 [2023-11-29 05:54:12,956 INFO L226 Difference]: Without dead ends: 1447 [2023-11-29 05:54:12,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=578, Invalid=1492, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 05:54:12,959 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 625 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:54:12,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1287 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 05:54:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2023-11-29 05:54:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 587. [2023-11-29 05:54:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 418 states have (on average 1.291866028708134) internal successors, (540), 422 states have internal predecessors, (540), 136 states have call successors, (136), 32 states have call predecessors, (136), 32 states have return successors, (136), 132 states have call predecessors, (136), 136 states have call successors, (136) [2023-11-29 05:54:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 812 transitions. [2023-11-29 05:54:13,047 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 812 transitions. Word has length 195 [2023-11-29 05:54:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:54:13,048 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 812 transitions. [2023-11-29 05:54:13,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 6 states have call successors, (60), 4 states have call predecessors, (60), 8 states have return successors, (60), 6 states have call predecessors, (60), 6 states have call successors, (60) [2023-11-29 05:54:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 812 transitions. [2023-11-29 05:54:13,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-29 05:54:13,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:54:13,050 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:54:13,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:54:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:13,250 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:54:13,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:54:13,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1635958098, now seen corresponding path program 1 times [2023-11-29 05:54:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:54:13,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289647153] [2023-11-29 05:54:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:54:13,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:54:13,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696433704] [2023-11-29 05:54:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:54:13,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:54:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:54:13,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:54:13,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08bb9087-da48-4793-bdea-609edb06d555/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:54:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:54:13,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 05:54:13,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:54:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 593 proven. 69 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2023-11-29 05:54:52,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:55:20,506 WARN L293 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 275 DAG size of output: 259 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:59:38,013 WARN L293 SmtUtils]: Spent 17.80s on a formula simplification that was a NOOP. DAG size: 196 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:00:54,223 WARN L293 SmtUtils]: Spent 33.24s on a formula simplification. DAG size of input: 199 DAG size of output: 199 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:01:47,319 WARN L293 SmtUtils]: Spent 25.50s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 06:05:25,204 WARN L293 SmtUtils]: Spent 2.22m on a formula simplification. DAG size of input: 413 DAG size of output: 298 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)