./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU --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 86018b7f3e582b94d83913c12d8eaea893434e1e96da49ea035805521496eb67 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:01:14,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:01:14,965 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:01:14,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:01:14,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:01:15,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:01:15,009 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:01:15,009 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:01:15,011 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:01:15,013 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:01:15,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:01:15,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:01:15,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:01:15,015 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:01:15,015 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:01:15,016 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:01:15,016 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:01:15,016 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:01:15,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:01:15,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:01:15,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:01:15,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:01:15,022 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:01:15,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:01:15,023 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:01:15,023 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:01:15,023 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:01:15,024 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:01:15,024 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:01:15,024 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:01:15,026 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:01:15,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:01:15,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:01:15,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:01:15,027 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:01:15,028 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:01:15,029 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:01:15,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:01:15,029 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:01:15,029 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:01:15,030 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:01:15,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:01:15,030 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_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86018b7f3e582b94d83913c12d8eaea893434e1e96da49ea035805521496eb67 [2024-10-31 22:01:15,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:01:15,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:01:15,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:01:15,392 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:01:15,393 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:01:15,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound100.c Unable to find full path for "g++" [2024-10-31 22:01:17,553 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:01:17,777 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:01:17,778 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound100.c [2024-10-31 22:01:17,786 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/data/9bcc37ca7/19e00e97a0a946fdbf2c98d2e2e8845c/FLAG342b4874b [2024-10-31 22:01:17,809 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/data/9bcc37ca7/19e00e97a0a946fdbf2c98d2e2e8845c [2024-10-31 22:01:17,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:01:17,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:01:17,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:01:17,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:01:17,825 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:01:17,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:01:17" (1/1) ... [2024-10-31 22:01:17,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7607a25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:17, skipping insertion in model container [2024-10-31 22:01:17,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:01:17" (1/1) ... [2024-10-31 22:01:17,858 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:01:18,060 WARN L251 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_65934ad7-56b0-492c-bace-6242e740308d/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound100.c[597,610] [2024-10-31 22:01:18,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:01:18,091 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:01:18,104 WARN L251 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_65934ad7-56b0-492c-bace-6242e740308d/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound100.c[597,610] [2024-10-31 22:01:18,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:01:18,129 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:01:18,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18 WrapperNode [2024-10-31 22:01:18,130 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:01:18,131 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:01:18,131 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:01:18,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:01:18,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,164 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2024-10-31 22:01:18,164 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:01:18,165 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:01:18,165 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:01:18,165 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:01:18,176 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,178 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,189 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]. [2024-10-31 22:01:18,189 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,190 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,193 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,196 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:01:18,204 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:01:18,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:01:18,205 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:01:18,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (1/1) ... [2024-10-31 22:01:18,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:01:18,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:18,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:01:18,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:01:18,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:01:18,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:01:18,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:01:18,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:01:18,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 22:01:18,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 22:01:18,373 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:01:18,377 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:01:18,549 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-10-31 22:01:18,549 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:01:18,566 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:01:18,566 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:01:18,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:01:18 BoogieIcfgContainer [2024-10-31 22:01:18,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:01:18,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:01:18,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:01:18,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:01:18,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:01:17" (1/3) ... [2024-10-31 22:01:18,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b12c0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:01:18, skipping insertion in model container [2024-10-31 22:01:18,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:01:18" (2/3) ... [2024-10-31 22:01:18,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b12c0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:01:18, skipping insertion in model container [2024-10-31 22:01:18,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:01:18" (3/3) ... [2024-10-31 22:01:18,575 INFO L112 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound100.c [2024-10-31 22:01:18,590 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:01:18,590 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:01:18,658 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:01:18,667 INFO L333 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, 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;@4a65c1ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:01:18,667 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:01:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:01:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 22:01:18,681 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:18,682 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:18,682 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:18,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash 180444447, now seen corresponding path program 1 times [2024-10-31 22:01:18,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:18,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559011726] [2024-10-31 22:01:18,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:18,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:01:18,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855059755] [2024-10-31 22:01:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:18,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:18,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:18,868 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:18,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:01:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:18,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:01:18,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:19,288 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:01:19,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:19,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559011726] [2024-10-31 22:01:19,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:01:19,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855059755] [2024-10-31 22:01:19,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855059755] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:19,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:19,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:01:19,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358082964] [2024-10-31 22:01:19,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:19,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:01:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:19,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:01:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:01:19,348 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:19,598 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2024-10-31 22:01:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:01:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 22:01:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:19,611 INFO L225 Difference]: With dead ends: 52 [2024-10-31 22:01:19,612 INFO L226 Difference]: Without dead ends: 28 [2024-10-31 22:01:19,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:01:19,619 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:19,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 64 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:01:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-31 22:01:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2024-10-31 22:01:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:01:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-10-31 22:01:19,661 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 8 [2024-10-31 22:01:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:19,662 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-10-31 22:01:19,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-10-31 22:01:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-31 22:01:19,663 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:19,663 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:19,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:01:19,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:19,865 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:19,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1226236780, now seen corresponding path program 1 times [2024-10-31 22:01:19,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528383042] [2024-10-31 22:01:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:19,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:20,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:20,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528383042] [2024-10-31 22:01:20,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528383042] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:20,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:20,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:01:20,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558004801] [2024-10-31 22:01:20,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:20,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:01:20,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:20,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:01:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:20,028 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:20,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:20,047 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2024-10-31 22:01:20,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:01:20,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-10-31 22:01:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:20,050 INFO L225 Difference]: With dead ends: 31 [2024-10-31 22:01:20,050 INFO L226 Difference]: Without dead ends: 23 [2024-10-31 22:01:20,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:01:20,052 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:20,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:01:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-10-31 22:01:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-10-31 22:01:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:01:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-10-31 22:01:20,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 9 [2024-10-31 22:01:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:20,060 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-10-31 22:01:20,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:01:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-10-31 22:01:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 22:01:20,061 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:20,061 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:20,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:01:20,062 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:20,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:20,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1414665262, now seen corresponding path program 1 times [2024-10-31 22:01:20,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:20,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648181534] [2024-10-31 22:01:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:20,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:01:20,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242224046] [2024-10-31 22:01:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:20,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:20,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:20,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:20,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:01:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:20,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:01:20,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:20,479 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:01:20,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:20,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648181534] [2024-10-31 22:01:20,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:01:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242224046] [2024-10-31 22:01:20,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242224046] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:01:20,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:01:20,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:01:20,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391647161] [2024-10-31 22:01:20,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:01:20,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:01:20,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:01:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:01:20,488 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:01:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:20,605 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-10-31 22:01:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:01:20,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-10-31 22:01:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:20,609 INFO L225 Difference]: With dead ends: 33 [2024-10-31 22:01:20,609 INFO L226 Difference]: Without dead ends: 25 [2024-10-31 22:01:20,610 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:01:20,613 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:20,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:01:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-31 22:01:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-10-31 22:01:20,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:01:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-10-31 22:01:20,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2024-10-31 22:01:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:20,629 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-10-31 22:01:20,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-31 22:01:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-10-31 22:01:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-31 22:01:20,630 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:20,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:20,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:01:20,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-31 22:01:20,840 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:20,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:20,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2080570626, now seen corresponding path program 1 times [2024-10-31 22:01:20,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:20,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793228925] [2024-10-31 22:01:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:20,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:01:20,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947596159] [2024-10-31 22:01:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:20,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:20,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:20,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:01:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:20,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:01:20,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:21,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:01:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793228925] [2024-10-31 22:01:21,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:01:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947596159] [2024-10-31 22:01:21,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947596159] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:21,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:01:21,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-10-31 22:01:21,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846061948] [2024-10-31 22:01:21,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:21,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:01:21,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:21,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:01:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:01:21,333 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:01:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:21,629 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2024-10-31 22:01:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:01:21,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-31 22:01:21,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:21,631 INFO L225 Difference]: With dead ends: 41 [2024-10-31 22:01:21,631 INFO L226 Difference]: Without dead ends: 37 [2024-10-31 22:01:21,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:01:21,633 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:21,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 85 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:01:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-31 22:01:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2024-10-31 22:01:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:01:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-10-31 22:01:21,643 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2024-10-31 22:01:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:21,643 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-10-31 22:01:21,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-31 22:01:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-10-31 22:01:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-31 22:01:21,644 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:21,644 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:21,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:01:21,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:21,845 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:21,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash 606185, now seen corresponding path program 1 times [2024-10-31 22:01:21,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:21,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399458773] [2024-10-31 22:01:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:21,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:21,993 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:01:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:22,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399458773] [2024-10-31 22:01:22,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399458773] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:22,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085137280] [2024-10-31 22:01:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:22,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:22,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:22,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:22,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:01:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:22,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:01:22,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:22,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:01:22,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085137280] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:22,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:22,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-10-31 22:01:22,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40368400] [2024-10-31 22:01:22,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:22,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:01:22,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:22,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:01:22,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:01:22,144 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:01:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:22,238 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2024-10-31 22:01:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:01:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-10-31 22:01:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:22,241 INFO L225 Difference]: With dead ends: 68 [2024-10-31 22:01:22,241 INFO L226 Difference]: Without dead ends: 62 [2024-10-31 22:01:22,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:01:22,242 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:22,243 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 78 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:01:22,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-31 22:01:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2024-10-31 22:01:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:01:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-10-31 22:01:22,259 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 19 [2024-10-31 22:01:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:22,259 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-10-31 22:01:22,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-31 22:01:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-10-31 22:01:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:01:22,261 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:22,261 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:22,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:01:22,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:22,465 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:22,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:22,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1993750159, now seen corresponding path program 1 times [2024-10-31 22:01:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:22,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487507229] [2024-10-31 22:01:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:01:22,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695167064] [2024-10-31 22:01:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:22,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:22,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:22,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:22,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:01:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:22,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:01:22,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:01:22,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:01:23,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:23,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487507229] [2024-10-31 22:01:23,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:01:23,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695167064] [2024-10-31 22:01:23,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695167064] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:23,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:01:23,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2024-10-31 22:01:23,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200270925] [2024-10-31 22:01:23,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:23,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:01:23,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:23,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:01:23,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:01:23,028 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:01:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:23,258 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2024-10-31 22:01:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:01:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2024-10-31 22:01:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:23,263 INFO L225 Difference]: With dead ends: 79 [2024-10-31 22:01:23,263 INFO L226 Difference]: Without dead ends: 73 [2024-10-31 22:01:23,264 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:01:23,265 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:23,265 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:01:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-31 22:01:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2024-10-31 22:01:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 22:01:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2024-10-31 22:01:23,304 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 25 [2024-10-31 22:01:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:23,305 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2024-10-31 22:01:23,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-31 22:01:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2024-10-31 22:01:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:01:23,307 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:23,307 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:23,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:01:23,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:23,512 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:23,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:23,513 INFO L85 PathProgramCache]: Analyzing trace with hash 713886481, now seen corresponding path program 1 times [2024-10-31 22:01:23,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:23,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374363948] [2024-10-31 22:01:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:23,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 22:01:23,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021342895] [2024-10-31 22:01:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:23,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:23,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:23,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:23,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:01:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:23,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 22:01:23,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:01:24,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:01:32,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:32,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374363948] [2024-10-31 22:01:32,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 22:01:32,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021342895] [2024-10-31 22:01:32,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021342895] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:32,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:01:32,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2024-10-31 22:01:32,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642080602] [2024-10-31 22:01:32,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:32,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:01:32,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:32,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:01:32,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=420, Unknown=1, NotChecked=0, Total=506 [2024-10-31 22:01:32,644 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 23 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:01:35,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:35,907 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2024-10-31 22:01:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 22:01:35,908 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2024-10-31 22:01:35,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:35,911 INFO L225 Difference]: With dead ends: 86 [2024-10-31 22:01:35,911 INFO L226 Difference]: Without dead ends: 78 [2024-10-31 22:01:35,912 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=203, Invalid=918, Unknown=1, NotChecked=0, Total=1122 [2024-10-31 22:01:35,913 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:35,913 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 118 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-10-31 22:01:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-10-31 22:01:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2024-10-31 22:01:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 62 states have internal predecessors, (73), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:01:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2024-10-31 22:01:35,941 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 25 [2024-10-31 22:01:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:35,941 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2024-10-31 22:01:35,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 states have internal predecessors, (32), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-31 22:01:35,942 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2024-10-31 22:01:35,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-31 22:01:35,943 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:35,943 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:35,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:01:36,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:36,148 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:36,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:36,148 INFO L85 PathProgramCache]: Analyzing trace with hash 741920142, now seen corresponding path program 1 times [2024-10-31 22:01:36,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:36,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414670251] [2024-10-31 22:01:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:36,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:36,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:01:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:36,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 22:01:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:36,601 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:01:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:01:36,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:36,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414670251] [2024-10-31 22:01:36,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414670251] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:36,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167642184] [2024-10-31 22:01:36,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:36,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:36,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:36,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:36,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:01:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:36,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:01:36,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:01:36,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-31 22:01:37,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167642184] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:37,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:37,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-31 22:01:37,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880487643] [2024-10-31 22:01:37,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:37,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:01:37,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:37,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:01:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:01:37,175 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:01:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:37,424 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2024-10-31 22:01:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:01:37,425 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 35 [2024-10-31 22:01:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:37,426 INFO L225 Difference]: With dead ends: 88 [2024-10-31 22:01:37,426 INFO L226 Difference]: Without dead ends: 82 [2024-10-31 22:01:37,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:01:37,428 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:37,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:01:37,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-31 22:01:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-10-31 22:01:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-31 22:01:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2024-10-31 22:01:37,452 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 35 [2024-10-31 22:01:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:37,452 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2024-10-31 22:01:37,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-31 22:01:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2024-10-31 22:01:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 22:01:37,454 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:37,455 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:37,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:01:37,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:37,659 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:37,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:37,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1464162251, now seen corresponding path program 2 times [2024-10-31 22:01:37,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:37,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334397686] [2024-10-31 22:01:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:37,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:37,983 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:01:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:37,995 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 22:01:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:38,001 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:01:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:38,007 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-31 22:01:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:01:38,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:38,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334397686] [2024-10-31 22:01:38,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334397686] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:38,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36704213] [2024-10-31 22:01:38,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:01:38,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:38,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:38,017 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:38,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:01:38,167 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:01:38,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:38,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-31 22:01:38,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:01:38,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:01:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:01:38,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36704213] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:01:38,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:01:38,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-10-31 22:01:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540442473] [2024-10-31 22:01:38,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:01:38,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-31 22:01:38,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:01:38,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-31 22:01:38,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2024-10-31 22:01:38,989 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-31 22:01:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:01:39,597 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2024-10-31 22:01:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-31 22:01:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 45 [2024-10-31 22:01:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:01:39,599 INFO L225 Difference]: With dead ends: 110 [2024-10-31 22:01:39,600 INFO L226 Difference]: Without dead ends: 104 [2024-10-31 22:01:39,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2024-10-31 22:01:39,601 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-31 22:01:39,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 160 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-31 22:01:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-31 22:01:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2024-10-31 22:01:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 82 states have internal predecessors, (98), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-31 22:01:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2024-10-31 22:01:39,646 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 45 [2024-10-31 22:01:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:01:39,646 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2024-10-31 22:01:39,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-31 22:01:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2024-10-31 22:01:39,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-31 22:01:39,648 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:01:39,649 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:01:39,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:01:39,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-31 22:01:39,853 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:01:39,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:01:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1900020427, now seen corresponding path program 3 times [2024-10-31 22:01:39,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:01:39,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566926625] [2024-10-31 22:01:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:01:39,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:01:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:39,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-10-31 22:01:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:39,956 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-31 22:01:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:39,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 22:01:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:39,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-31 22:01:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:01:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 22:01:39,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:01:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566926625] [2024-10-31 22:01:39,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566926625] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:01:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893995945] [2024-10-31 22:01:39,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:01:39,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:01:39,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:01:39,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:01:39,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65934ad7-56b0-492c-bace-6242e740308d/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:01:40,114 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:01:40,115 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:01:40,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-31 22:01:40,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:01:41,235 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-31 22:01:41,235 INFO L311 TraceCheckSpWp]: Computing backward predicates...