./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/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_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/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_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/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 9cf0abd1bd1b4ed3cb492af2ceaa5e063719310ace8aba62ab225fe204180938 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:56:57,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:56:57,764 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:56:57,769 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:56:57,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:56:57,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:56:57,809 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:56:57,810 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:56:57,810 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:56:57,812 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:56:57,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:56:57,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:56:57,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:56:57,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:56:57,815 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:56:57,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:56:57,815 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:56:57,816 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:56:57,816 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:56:57,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:56:57,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:56:57,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:56:57,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:56:57,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:56:57,818 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:56:57,818 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:56:57,819 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:56:57,819 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:56:57,819 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:56:57,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:56:57,820 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:56:57,820 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:56:57,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:56:57,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:56:57,821 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:56:57,821 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:56:57,821 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:56:57,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:56:57,824 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:56:57,824 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:56:57,825 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:56:57,825 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:56:57,825 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_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cf0abd1bd1b4ed3cb492af2ceaa5e063719310ace8aba62ab225fe204180938 [2024-10-31 21:56:58,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:56:58,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:56:58,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:56:58,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:56:58,182 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:56:58,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c Unable to find full path for "g++" [2024-10-31 21:57:00,418 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:57:00,630 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:57:00,633 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2024-10-31 21:57:00,644 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/data/fb3358581/3eb54ea2400241c694734238bde5ae30/FLAGfd8414804 [2024-10-31 21:57:00,660 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/data/fb3358581/3eb54ea2400241c694734238bde5ae30 [2024-10-31 21:57:00,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:57:00,664 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:57:00,666 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:57:00,666 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:57:00,672 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:57:00,673 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:57:00" (1/1) ... [2024-10-31 21:57:00,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a92ea82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:00, skipping insertion in model container [2024-10-31 21:57:00,675 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:57:00" (1/1) ... [2024-10-31 21:57:00,701 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:57:00,959 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_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c[576,589] [2024-10-31 21:57:00,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:57:01,003 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:57:01,017 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_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c[576,589] [2024-10-31 21:57:01,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:57:01,056 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:57:01,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01 WrapperNode [2024-10-31 21:57:01,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:57:01,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:57:01,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:57:01,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:57:01,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,096 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-10-31 21:57:01,098 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:57:01,099 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:57:01,099 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:57:01,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:57:01,111 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,134 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 21:57:01,135 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,135 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,140 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,145 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:57:01,148 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:57:01,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:57:01,149 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:57:01,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (1/1) ... [2024-10-31 21:57:01,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:57:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:01,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:57:01,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:57:01,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:57:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:57:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:57:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:57:01,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-31 21:57:01,232 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-31 21:57:01,320 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:57:01,324 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:57:01,561 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-31 21:57:01,562 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:57:01,577 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:57:01,577 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 21:57:01,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:57:01 BoogieIcfgContainer [2024-10-31 21:57:01,578 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:57:01,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:57:01,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:57:01,587 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:57:01,588 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:57:00" (1/3) ... [2024-10-31 21:57:01,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fc9c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:57:01, skipping insertion in model container [2024-10-31 21:57:01,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:57:01" (2/3) ... [2024-10-31 21:57:01,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fc9c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:57:01, skipping insertion in model container [2024-10-31 21:57:01,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:57:01" (3/3) ... [2024-10-31 21:57:01,592 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound50.c [2024-10-31 21:57:01,615 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:57:01,615 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:57:01,707 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:57:01,717 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;@38c07630, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:57:01,717 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 21:57:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 21:57:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-31 21:57:01,732 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:01,733 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:01,734 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:01,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash -555122024, now seen corresponding path program 1 times [2024-10-31 21:57:01,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:01,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172632082] [2024-10-31 21:57:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:01,927 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 21:57:01,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:01,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172632082] [2024-10-31 21:57:01,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172632082] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:01,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:01,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:57:01,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593498795] [2024-10-31 21:57:01,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:01,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 21:57:01,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 21:57:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 21:57:01,966 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 21:57:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:01,998 INFO L93 Difference]: Finished difference Result 55 states and 87 transitions. [2024-10-31 21:57:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 21:57:02,000 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 21:57:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:02,008 INFO L225 Difference]: With dead ends: 55 [2024-10-31 21:57:02,008 INFO L226 Difference]: Without dead ends: 25 [2024-10-31 21:57:02,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 21:57:02,018 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:02,020 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:57:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-31 21:57:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-31 21:57:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 21:57:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2024-10-31 21:57:02,065 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 9 [2024-10-31 21:57:02,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:02,065 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2024-10-31 21:57:02,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 21:57:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2024-10-31 21:57:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 21:57:02,069 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:02,069 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:02,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:57:02,070 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:02,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:02,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1985514477, now seen corresponding path program 1 times [2024-10-31 21:57:02,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:02,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361333252] [2024-10-31 21:57:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:02,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:02,212 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 21:57:02,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361333252] [2024-10-31 21:57:02,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361333252] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:02,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:02,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 21:57:02,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695913071] [2024-10-31 21:57:02,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:02,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:57:02,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:02,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:57:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:57:02,220 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 21:57:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:02,252 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-10-31 21:57:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:57:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2024-10-31 21:57:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:02,254 INFO L225 Difference]: With dead ends: 34 [2024-10-31 21:57:02,254 INFO L226 Difference]: Without dead ends: 27 [2024-10-31 21:57:02,254 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 21:57:02,256 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:02,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:57:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-31 21:57:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-10-31 21:57:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-31 21:57:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-10-31 21:57:02,268 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 10 [2024-10-31 21:57:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:02,268 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-10-31 21:57:02,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 21:57:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-10-31 21:57:02,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 21:57:02,271 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:02,271 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:02,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:57:02,272 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:02,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1984024927, now seen corresponding path program 1 times [2024-10-31 21:57:02,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:02,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321087671] [2024-10-31 21:57:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:02,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:57:02,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644779774] [2024-10-31 21:57:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:02,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:02,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:02,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:57:02,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:57:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:02,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 21:57:02,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:57:02,492 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 21:57:02,492 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:57:02,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:02,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321087671] [2024-10-31 21:57:02,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:57:02,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644779774] [2024-10-31 21:57:02,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644779774] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:02,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:02,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:57:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108747130] [2024-10-31 21:57:02,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:02,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:57:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:57:02,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:57:02,498 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 21:57:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:02,596 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2024-10-31 21:57:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:57:02,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2024-10-31 21:57:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:02,599 INFO L225 Difference]: With dead ends: 37 [2024-10-31 21:57:02,599 INFO L226 Difference]: Without dead ends: 35 [2024-10-31 21:57:02,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:57:02,601 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:02,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 111 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:57:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-10-31 21:57:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-10-31 21:57:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-10-31 21:57:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-10-31 21:57:02,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 10 [2024-10-31 21:57:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:02,618 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-10-31 21:57:02,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 21:57:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-10-31 21:57:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-31 21:57:02,622 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:02,622 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:02,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 21:57:02,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:02,823 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:02,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2084809189, now seen corresponding path program 1 times [2024-10-31 21:57:02,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:02,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255378724] [2024-10-31 21:57:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:57:02,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938524989] [2024-10-31 21:57:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:02,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:02,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:02,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:57:02,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:57:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:02,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 21:57:02,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:57:02,979 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 21:57:02,979 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:57:02,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:02,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255378724] [2024-10-31 21:57:02,980 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:57:02,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938524989] [2024-10-31 21:57:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938524989] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:02,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:02,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:57:02,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953834517] [2024-10-31 21:57:02,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:02,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:57:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:57:02,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:57:02,983 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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 21:57:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:03,074 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2024-10-31 21:57:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:57:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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 21:57:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:03,076 INFO L225 Difference]: With dead ends: 50 [2024-10-31 21:57:03,076 INFO L226 Difference]: Without dead ends: 47 [2024-10-31 21:57:03,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:57:03,078 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:03,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:57:03,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-31 21:57:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-10-31 21:57:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-10-31 21:57:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-10-31 21:57:03,090 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 15 [2024-10-31 21:57:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:03,090 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-10-31 21:57:03,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 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 21:57:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-10-31 21:57:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-31 21:57:03,092 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:03,092 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:03,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:57:03,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:03,297 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:03,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2002825724, now seen corresponding path program 1 times [2024-10-31 21:57:03,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:03,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242882780] [2024-10-31 21:57:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:03,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:57:03,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693099313] [2024-10-31 21:57:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:03,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:03,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:03,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:57:03,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:57:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:03,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 21:57:03,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:57:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:57:03,506 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:57:03,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:03,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242882780] [2024-10-31 21:57:03,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:57:03,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693099313] [2024-10-31 21:57:03,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693099313] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:03,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:03,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:57:03,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183679875] [2024-10-31 21:57:03,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:03,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:57:03,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:57:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:57:03,512 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 21:57:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:03,616 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2024-10-31 21:57:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:57:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-10-31 21:57:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:03,619 INFO L225 Difference]: With dead ends: 75 [2024-10-31 21:57:03,619 INFO L226 Difference]: Without dead ends: 73 [2024-10-31 21:57:03,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-31 21:57:03,621 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:03,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 117 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:57:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-31 21:57:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2024-10-31 21:57:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 43 states have internal predecessors, (53), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-31 21:57:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 92 transitions. [2024-10-31 21:57:03,638 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 92 transitions. Word has length 23 [2024-10-31 21:57:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:03,639 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 92 transitions. [2024-10-31 21:57:03,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 21:57:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 92 transitions. [2024-10-31 21:57:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-31 21:57:03,640 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:03,641 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:03,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 21:57:03,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:03,841 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:03,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:03,842 INFO L85 PathProgramCache]: Analyzing trace with hash -840648207, now seen corresponding path program 1 times [2024-10-31 21:57:03,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:03,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523369333] [2024-10-31 21:57:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:03,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,056 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:57:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,065 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 21:57:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 21:57:04,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:04,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523369333] [2024-10-31 21:57:04,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523369333] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:04,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:04,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:57:04,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553387589] [2024-10-31 21:57:04,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:04,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:57:04,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:57:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:57:04,077 INFO L87 Difference]: Start difference. First operand 66 states and 92 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 21:57:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:04,118 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-10-31 21:57:04,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:57:04,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-10-31 21:57:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:04,123 INFO L225 Difference]: With dead ends: 105 [2024-10-31 21:57:04,123 INFO L226 Difference]: Without dead ends: 70 [2024-10-31 21:57:04,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:57:04,125 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:04,128 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 92 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:57:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-10-31 21:57:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-10-31 21:57:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-31 21:57:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-10-31 21:57:04,145 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 26 [2024-10-31 21:57:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:04,145 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-10-31 21:57:04,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-31 21:57:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-10-31 21:57:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-31 21:57:04,146 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:04,146 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:04,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 21:57:04,147 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:04,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2012484164, now seen corresponding path program 1 times [2024-10-31 21:57:04,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:04,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038884115] [2024-10-31 21:57:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:04,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,451 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:57:04,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,464 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 21:57:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,473 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 21:57:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:57:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-31 21:57:04,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:04,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038884115] [2024-10-31 21:57:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038884115] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:04,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:57:04,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 21:57:04,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548013649] [2024-10-31 21:57:04,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:04,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:57:04,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:04,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:57:04,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 21:57:04,499 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 21:57:04,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:04,606 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2024-10-31 21:57:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:57:04,607 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-10-31 21:57:04,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:04,608 INFO L225 Difference]: With dead ends: 76 [2024-10-31 21:57:04,608 INFO L226 Difference]: Without dead ends: 74 [2024-10-31 21:57:04,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:57:04,609 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:04,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 108 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:57:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-31 21:57:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-10-31 21:57:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-10-31 21:57:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-10-31 21:57:04,627 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 33 [2024-10-31 21:57:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:04,628 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-10-31 21:57:04,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-31 21:57:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-10-31 21:57:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-31 21:57:04,629 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:04,629 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:04,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 21:57:04,630 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:04,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2020901362, now seen corresponding path program 1 times [2024-10-31 21:57:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:04,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886478543] [2024-10-31 21:57:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:04,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:57:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,866 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 21:57:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,871 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 21:57:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,904 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:57:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-31 21:57:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-31 21:57:04,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:04,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886478543] [2024-10-31 21:57:04,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886478543] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:57:04,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280841869] [2024-10-31 21:57:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:04,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:04,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:57:04,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:57:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:05,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 21:57:05,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:57:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 21:57:05,170 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 21:57:05,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280841869] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:57:05,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:57:05,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-10-31 21:57:05,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704064096] [2024-10-31 21:57:05,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:05,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 21:57:05,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 21:57:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:57:05,172 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:57:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:05,324 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2024-10-31 21:57:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 21:57:05,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-10-31 21:57:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:05,330 INFO L225 Difference]: With dead ends: 87 [2024-10-31 21:57:05,330 INFO L226 Difference]: Without dead ends: 85 [2024-10-31 21:57:05,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:57:05,331 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:05,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 155 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:57:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-10-31 21:57:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2024-10-31 21:57:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.22) internal successors, (61), 54 states have internal predecessors, (61), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2024-10-31 21:57:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2024-10-31 21:57:05,351 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 39 [2024-10-31 21:57:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:05,351 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2024-10-31 21:57:05,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-31 21:57:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2024-10-31 21:57:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-31 21:57:05,353 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:05,353 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:05,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-31 21:57:05,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:05,557 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:05,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash 803844641, now seen corresponding path program 1 times [2024-10-31 21:57:05,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:05,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656221847] [2024-10-31 21:57:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:05,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:05,650 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:57:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:05,657 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 21:57:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:05,668 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 21:57:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:05,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:57:05,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:05,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-31 21:57:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 21:57:05,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:05,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656221847] [2024-10-31 21:57:05,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656221847] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:57:05,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528521412] [2024-10-31 21:57:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:05,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:05,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:05,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:57:05,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:57:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:05,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 21:57:05,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:57:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 21:57:05,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:57:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-31 21:57:06,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528521412] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:57:06,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:57:06,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-10-31 21:57:06,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931804078] [2024-10-31 21:57:06,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:57:06,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 21:57:06,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 21:57:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-31 21:57:06,010 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-31 21:57:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:06,288 INFO L93 Difference]: Finished difference Result 247 states and 304 transitions. [2024-10-31 21:57:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 21:57:06,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 42 [2024-10-31 21:57:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:06,293 INFO L225 Difference]: With dead ends: 247 [2024-10-31 21:57:06,293 INFO L226 Difference]: Without dead ends: 240 [2024-10-31 21:57:06,295 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:57:06,297 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:06,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 176 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:57:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-10-31 21:57:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-10-31 21:57:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 153 states have internal predecessors, (173), 55 states have call successors, (55), 24 states have call predecessors, (55), 24 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2024-10-31 21:57:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 279 transitions. [2024-10-31 21:57:06,366 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 279 transitions. Word has length 42 [2024-10-31 21:57:06,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:06,367 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 279 transitions. [2024-10-31 21:57:06,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 5 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-10-31 21:57:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 279 transitions. [2024-10-31 21:57:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-31 21:57:06,373 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:06,373 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:06,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:57:06,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:06,574 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:06,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1528082637, now seen corresponding path program 1 times [2024-10-31 21:57:06,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:06,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659628493] [2024-10-31 21:57:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:06,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:57:06,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939948055] [2024-10-31 21:57:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:06,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:06,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:57:06,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:57:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:06,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 21:57:06,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:57:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-31 21:57:07,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:57:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-10-31 21:57:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659628493] [2024-10-31 21:57:07,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:57:07,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939948055] [2024-10-31 21:57:07,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939948055] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 21:57:07,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 21:57:07,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2024-10-31 21:57:07,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694836812] [2024-10-31 21:57:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:57:07,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 21:57:07,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 21:57:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-10-31 21:57:07,406 INFO L87 Difference]: Start difference. First operand 224 states and 279 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 21:57:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:07,610 INFO L93 Difference]: Finished difference Result 242 states and 296 transitions. [2024-10-31 21:57:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:57:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-10-31 21:57:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:07,614 INFO L225 Difference]: With dead ends: 242 [2024-10-31 21:57:07,614 INFO L226 Difference]: Without dead ends: 236 [2024-10-31 21:57:07,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-10-31 21:57:07,617 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:07,617 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 95 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:57:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-31 21:57:07,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2024-10-31 21:57:07,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 117 states have internal predecessors, (127), 36 states have call successors, (36), 22 states have call predecessors, (36), 22 states have return successors, (36), 31 states have call predecessors, (36), 36 states have call successors, (36) [2024-10-31 21:57:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 199 transitions. [2024-10-31 21:57:07,682 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 199 transitions. Word has length 47 [2024-10-31 21:57:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:07,682 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 199 transitions. [2024-10-31 21:57:07,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-31 21:57:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 199 transitions. [2024-10-31 21:57:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-10-31 21:57:07,684 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:57:07,684 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:07,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-31 21:57:07,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 21:57:07,897 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:57:07,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:57:07,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1339763981, now seen corresponding path program 1 times [2024-10-31 21:57:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:57:07,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906254944] [2024-10-31 21:57:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:07,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:57:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,045 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-31 21:57:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-10-31 21:57:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,051 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-10-31 21:57:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,054 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-31 21:57:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,058 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-31 21:57:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,060 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-10-31 21:57:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,063 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-10-31 21:57:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,106 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-10-31 21:57:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,112 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-10-31 21:57:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-10-31 21:57:08,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:57:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906254944] [2024-10-31 21:57:08,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906254944] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:57:08,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300567756] [2024-10-31 21:57:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:57:08,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:08,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:57:08,120 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:57:08,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 21:57:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:57:08,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 21:57:08,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:57:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-10-31 21:57:08,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:57:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-10-31 21:57:08,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300567756] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:57:08,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:57:08,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2024-10-31 21:57:08,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263214405] [2024-10-31 21:57:08,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:57:08,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:57:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:57:08,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:57:08,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:57:08,412 INFO L87 Difference]: Start difference. First operand 171 states and 199 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-31 21:57:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:57:08,570 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2024-10-31 21:57:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 21:57:08,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 63 [2024-10-31 21:57:08,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:57:08,572 INFO L225 Difference]: With dead ends: 183 [2024-10-31 21:57:08,572 INFO L226 Difference]: Without dead ends: 0 [2024-10-31 21:57:08,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 21:57:08,573 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:57:08,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 84 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:57:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-31 21:57:08,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-31 21:57:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:57:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-31 21:57:08,575 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2024-10-31 21:57:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:57:08,575 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-31 21:57:08,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-10-31 21:57:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-31 21:57:08,575 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-31 21:57:08,578 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 21:57:08,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 21:57:08,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:57:08,785 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:57:08,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-31 21:57:10,037 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 21:57:10,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 09:57:10 BoogieIcfgContainer [2024-10-31 21:57:10,071 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 21:57:10,072 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-31 21:57:10,072 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-31 21:57:10,072 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-31 21:57:10,073 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:57:01" (3/4) ... [2024-10-31 21:57:10,075 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-10-31 21:57:10,080 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-31 21:57:10,085 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2024-10-31 21:57:10,085 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-10-31 21:57:10,085 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-31 21:57:10,085 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-31 21:57:10,178 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/witness.graphml [2024-10-31 21:57:10,181 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/witness.yml [2024-10-31 21:57:10,181 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-31 21:57:10,182 INFO L158 Benchmark]: Toolchain (without parser) took 9518.33ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 117.0MB in the beginning and 82.6MB in the end (delta: 34.4MB). Peak memory consumption was 69.0MB. Max. memory is 16.1GB. [2024-10-31 21:57:10,182 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory is still 56.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 21:57:10,183 INFO L158 Benchmark]: CACSL2BoogieTranslator took 392.15ms. Allocated memory is still 151.0MB. Free memory was 116.6MB in the beginning and 103.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-31 21:57:10,183 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.73ms. Allocated memory is still 151.0MB. Free memory was 103.9MB in the beginning and 102.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-31 21:57:10,183 INFO L158 Benchmark]: Boogie Preprocessor took 48.73ms. Allocated memory is still 151.0MB. Free memory was 102.3MB in the beginning and 100.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-31 21:57:10,183 INFO L158 Benchmark]: RCFGBuilder took 429.91ms. Allocated memory is still 151.0MB. Free memory was 100.5MB in the beginning and 89.3MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-31 21:57:10,184 INFO L158 Benchmark]: TraceAbstraction took 8488.46ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 88.4MB in the beginning and 87.8MB in the end (delta: 599.9kB). Peak memory consumption was 73.2MB. Max. memory is 16.1GB. [2024-10-31 21:57:10,184 INFO L158 Benchmark]: Witness Printer took 109.75ms. Allocated memory is still 182.5MB. Free memory was 87.8MB in the beginning and 82.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-10-31 21:57:10,186 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 109.1MB. Free memory is still 56.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 392.15ms. Allocated memory is still 151.0MB. Free memory was 116.6MB in the beginning and 103.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.73ms. Allocated memory is still 151.0MB. Free memory was 103.9MB in the beginning and 102.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.73ms. Allocated memory is still 151.0MB. Free memory was 102.3MB in the beginning and 100.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 429.91ms. Allocated memory is still 151.0MB. Free memory was 100.5MB in the beginning and 89.3MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 8488.46ms. Allocated memory was 151.0MB in the beginning and 182.5MB in the end (delta: 31.5MB). Free memory was 88.4MB in the beginning and 87.8MB in the end (delta: 599.9kB). Peak memory consumption was 73.2MB. Max. memory is 16.1GB. * Witness Printer took 109.75ms. Allocated memory is still 182.5MB. Free memory was 87.8MB in the beginning and 82.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.1s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 210 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 190 mSDsluCounter, 1165 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 837 mSDsCounter, 62 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 482 IncrementalHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 62 mSolverCounterUnsat, 328 mSDtfsCounter, 482 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 484 GetRequests, 406 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=224occurred in iteration=9, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 97 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 556 NumberOfCodeBlocks, 556 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 596 ConstructedInterpolants, 0 QuantifiedInterpolants, 1574 SizeOfPredicates, 13 NumberOfNonLiveVariables, 712 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 905/967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((x == (r + ((__int128) q * y))) && (1 <= y)) && (1 <= r)) && (((__int128) b + x) == ((((__int128) a * y) + r) + ((__int128) q * y)))) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((x == (r + ((__int128) q * y))) && (1 <= y)) && (((__int128) b + x) == ((((__int128) a * y) + r) + ((__int128) q * y)))) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: ((cond != 0) && (counter == \old(counter))) RESULT: Ultimate proved your program to be correct! [2024-10-31 21:57:10,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c7bbcbc-08a8-4ada-88a4-466f0466bbb1/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE