./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i --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_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/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_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_reverse_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/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_ab28c162-3c75-4d56-928a-02b7961b8cf4/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 cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:08:59,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:08:59,517 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 22:08:59,523 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:08:59,526 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:08:59,567 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:08:59,568 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:08:59,568 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:08:59,569 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:08:59,569 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:08:59,571 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:08:59,571 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:08:59,572 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:08:59,573 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:08:59,576 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:08:59,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:08:59,577 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 22:08:59,577 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:08:59,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:08:59,578 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:08:59,582 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:08:59,582 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 22:08:59,583 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:08:59,583 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 22:08:59,583 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:08:59,584 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:08:59,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 22:08:59,584 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:08:59,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:08:59,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:08:59,585 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:08:59,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:08:59,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:08:59,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:08:59,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:08:59,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 22:08:59,589 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:08:59,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:08:59,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:08:59,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:08:59,590 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:08:59,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:08:59,591 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_ab28c162-3c75-4d56-928a-02b7961b8cf4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cce6de3c48d80c64796d0d47269c605ab237c0f177720038579dfa7efd061db0 [2024-10-31 22:08:59,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:08:59,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:08:59,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:08:59,964 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:08:59,964 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:08:59,966 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/array-examples/standard_reverse_ground.i Unable to find full path for "g++" [2024-10-31 22:09:02,015 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:09:02,246 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:09:02,247 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/sv-benchmarks/c/array-examples/standard_reverse_ground.i [2024-10-31 22:09:02,258 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/data/e49b20234/fb92d5a53fac46a6b488e8d31349d6f0/FLAGb786cfdf7 [2024-10-31 22:09:02,601 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/data/e49b20234/fb92d5a53fac46a6b488e8d31349d6f0 [2024-10-31 22:09:02,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:09:02,605 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:09:02,606 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:09:02,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:09:02,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:09:02,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:02,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326645e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02, skipping insertion in model container [2024-10-31 22:09:02,616 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:02,642 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:09:02,877 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_ab28c162-3c75-4d56-928a-02b7961b8cf4/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2024-10-31 22:09:02,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:09:02,917 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:09:02,930 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_ab28c162-3c75-4d56-928a-02b7961b8cf4/sv-benchmarks/c/array-examples/standard_reverse_ground.i[816,829] [2024-10-31 22:09:02,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:09:02,961 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:09:02,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02 WrapperNode [2024-10-31 22:09:02,961 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:09:02,963 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:09:02,963 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:09:02,964 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:09:02,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:02,980 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,003 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 63 [2024-10-31 22:09:03,004 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:09:03,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:09:03,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:09:03,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:09:03,022 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,025 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,043 INFO L175 MemorySlicer]: Split 7 memory accesses to 3 slices as follows [2, 2, 3]. 43 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-31 22:09:03,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,054 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,057 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:09:03,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:09:03,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:09:03,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:09:03,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (1/1) ... [2024-10-31 22:09:03,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:09:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:03,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:09:03,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:09:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:09:03,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:09:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:09:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:09:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:09:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:09:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:09:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:09:03,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:09:03,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:09:03,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:09:03,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:09:03,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:09:03,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:09:03,209 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:09:03,211 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:09:03,418 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-10-31 22:09:03,419 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:09:03,435 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:09:03,436 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:09:03,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:09:03 BoogieIcfgContainer [2024-10-31 22:09:03,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:09:03,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:09:03,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:09:03,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:09:03,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:09:02" (1/3) ... [2024-10-31 22:09:03,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37426deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:09:03, skipping insertion in model container [2024-10-31 22:09:03,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:09:02" (2/3) ... [2024-10-31 22:09:03,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37426deb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:09:03, skipping insertion in model container [2024-10-31 22:09:03,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:09:03" (3/3) ... [2024-10-31 22:09:03,451 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_reverse_ground.i [2024-10-31 22:09:03,466 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:09:03,466 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 22:09:03,530 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:09:03,536 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;@4854c89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:09:03,536 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 22:09:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 22:09:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-10-31 22:09:03,548 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:09:03,548 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:03,549 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:09:03,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:03,555 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2024-10-31 22:09:03,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:03,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93246251] [2024-10-31 22:09:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:09:03,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:03,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93246251] [2024-10-31 22:09:03,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93246251] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:03,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:09:03,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:09:03,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048545336] [2024-10-31 22:09:03,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:03,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:09:03,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:09:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:09:03,876 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 22:09:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:09:03,917 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2024-10-31 22:09:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:09:03,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) Word has length 9 [2024-10-31 22:09:03,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:09:03,924 INFO L225 Difference]: With dead ends: 36 [2024-10-31 22:09:03,924 INFO L226 Difference]: Without dead ends: 18 [2024-10-31 22:09:03,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:09:03,930 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 22:09:03,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 22:09:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-31 22:09:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-10-31 22:09:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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 22:09:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-10-31 22:09:03,964 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2024-10-31 22:09:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:09:03,965 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-10-31 22:09:03,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 22:09:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-10-31 22:09:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-31 22:09:03,968 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:09:03,968 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:03,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:09:03,969 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:09:03,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2024-10-31 22:09:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:03,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133838990] [2024-10-31 22:09:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:09:04,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:04,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133838990] [2024-10-31 22:09:04,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133838990] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:04,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389574578] [2024-10-31 22:09:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:04,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:04,096 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:04,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:09:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:04,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-31 22:09:04,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:09:04,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:09:04,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389574578] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:09:04,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:09:04,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:09:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795276680] [2024-10-31 22:09:04,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:09:04,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:09:04,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:04,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:09:04,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:09:04,306 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 22:09:04,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:09:04,374 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-10-31 22:09:04,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:09:04,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) Word has length 13 [2024-10-31 22:09:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:09:04,376 INFO L225 Difference]: With dead ends: 39 [2024-10-31 22:09:04,376 INFO L226 Difference]: Without dead ends: 28 [2024-10-31 22:09:04,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:09:04,377 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:09:04,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:09:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-31 22:09:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-31 22:09:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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 22:09:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-10-31 22:09:04,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2024-10-31 22:09:04,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:09:04,385 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-10-31 22:09:04,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 22:09:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-10-31 22:09:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-31 22:09:04,386 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:09:04,386 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:04,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:09:04,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-10-31 22:09:04,590 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:09:04,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:04,591 INFO L85 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 2 times [2024-10-31 22:09:04,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:04,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33709375] [2024-10-31 22:09:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:04,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:09:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33709375] [2024-10-31 22:09:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33709375] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:04,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245283176] [2024-10-31 22:09:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:09:04,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:04,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:04,868 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:04,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:09:04,962 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:09:04,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:09:04,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:09:04,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:09:05,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-31 22:09:05,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245283176] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:09:05,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:09:05,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-31 22:09:05,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246280439] [2024-10-31 22:09:05,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:09:05,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:09:05,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:09:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:09:05,156 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 22:09:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:09:05,317 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2024-10-31 22:09:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:09:05,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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) Word has length 25 [2024-10-31 22:09:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:09:05,319 INFO L225 Difference]: With dead ends: 69 [2024-10-31 22:09:05,319 INFO L226 Difference]: Without dead ends: 52 [2024-10-31 22:09:05,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:09:05,324 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:09:05,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:09:05,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-31 22:09:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-10-31 22:09:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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 22:09:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-10-31 22:09:05,342 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 25 [2024-10-31 22:09:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:09:05,343 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-10-31 22:09:05,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 22:09:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-10-31 22:09:05,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-31 22:09:05,346 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:09:05,347 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:05,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:09:05,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:05,552 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:09:05,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:05,553 INFO L85 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 3 times [2024-10-31 22:09:05,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:05,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825015112] [2024-10-31 22:09:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:05,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-10-31 22:09:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825015112] [2024-10-31 22:09:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825015112] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964216987] [2024-10-31 22:09:05,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:09:05,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:05,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:06,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:09:06,110 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-31 22:09:06,110 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:09:06,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:09:06,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:06,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-31 22:09:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-10-31 22:09:06,497 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:09:06,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964216987] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:09:06,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:09:06,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2024-10-31 22:09:06,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806695288] [2024-10-31 22:09:06,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:09:06,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:09:06,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:06,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:09:06,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:09:06,502 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 22:09:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:09:06,626 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2024-10-31 22:09:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:09:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) Word has length 49 [2024-10-31 22:09:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:09:06,628 INFO L225 Difference]: With dead ends: 58 [2024-10-31 22:09:06,628 INFO L226 Difference]: Without dead ends: 56 [2024-10-31 22:09:06,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:09:06,632 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 22:09:06,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 36 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 22:09:06,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-31 22:09:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2024-10-31 22:09:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 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 22:09:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-10-31 22:09:06,645 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2024-10-31 22:09:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:09:06,646 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-10-31 22:09:06,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 22:09:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-10-31 22:09:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-31 22:09:06,648 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:09:06,648 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:06,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:09:06,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:06,853 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:09:06,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:06,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1048670371, now seen corresponding path program 1 times [2024-10-31 22:09:06,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:06,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402265296] [2024-10-31 22:09:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:06,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-10-31 22:09:07,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:07,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402265296] [2024-10-31 22:09:07,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402265296] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:07,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336189348] [2024-10-31 22:09:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:07,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:07,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:07,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:09:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:07,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:09:07,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-10-31 22:09:07,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2024-10-31 22:09:07,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336189348] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:09:07,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:09:07,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-10-31 22:09:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086283144] [2024-10-31 22:09:07,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:09:07,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-31 22:09:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-31 22:09:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:09:07,916 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 22:09:08,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:09:08,230 INFO L93 Difference]: Finished difference Result 133 states and 160 transitions. [2024-10-31 22:09:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-31 22:09:08,231 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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) Word has length 53 [2024-10-31 22:09:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:09:08,232 INFO L225 Difference]: With dead ends: 133 [2024-10-31 22:09:08,235 INFO L226 Difference]: Without dead ends: 102 [2024-10-31 22:09:08,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-31 22:09:08,237 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 22:09:08,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 36 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 22:09:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-10-31 22:09:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-10-31 22:09:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 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 22:09:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2024-10-31 22:09:08,286 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 53 [2024-10-31 22:09:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:09:08,287 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2024-10-31 22:09:08,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 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 22:09:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2024-10-31 22:09:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-10-31 22:09:08,292 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:09:08,293 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:08,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:09:08,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:08,494 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:09:08,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:08,495 INFO L85 PathProgramCache]: Analyzing trace with hash -109773453, now seen corresponding path program 2 times [2024-10-31 22:09:08,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:08,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091481596] [2024-10-31 22:09:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:08,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-10-31 22:09:09,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:09,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091481596] [2024-10-31 22:09:09,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091481596] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:09,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997181988] [2024-10-31 22:09:09,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:09:09,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:09,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:09,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:09:09,802 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:09:09,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:09:09,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-31 22:09:09,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-10-31 22:09:09,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-10-31 22:09:11,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997181988] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:09:11,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:09:11,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-10-31 22:09:11,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940199449] [2024-10-31 22:09:11,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:09:11,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-10-31 22:09:11,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-10-31 22:09:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-31 22:09:11,189 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 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 22:09:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 22:09:11,934 INFO L93 Difference]: Finished difference Result 253 states and 304 transitions. [2024-10-31 22:09:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-10-31 22:09:11,935 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 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) Word has length 101 [2024-10-31 22:09:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 22:09:11,939 INFO L225 Difference]: With dead ends: 253 [2024-10-31 22:09:11,939 INFO L226 Difference]: Without dead ends: 198 [2024-10-31 22:09:11,941 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-10-31 22:09:11,943 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-31 22:09:11,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 36 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-31 22:09:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-10-31 22:09:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2024-10-31 22:09:11,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 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 22:09:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2024-10-31 22:09:11,994 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 101 [2024-10-31 22:09:11,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 22:09:11,997 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2024-10-31 22:09:11,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.183673469387755) internal successors, (107), 49 states have internal predecessors, (107), 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 22:09:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2024-10-31 22:09:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-10-31 22:09:12,001 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 22:09:12,001 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:09:12,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:09:12,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:09:12,206 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 22:09:12,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:09:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash -645892333, now seen corresponding path program 3 times [2024-10-31 22:09:12,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:09:12,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392039491] [2024-10-31 22:09:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:09:12,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:09:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:09:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2024-10-31 22:09:16,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:09:16,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392039491] [2024-10-31 22:09:16,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392039491] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:09:16,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667608960] [2024-10-31 22:09:16,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:09:16,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:09:16,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:09:16,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:09:16,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab28c162-3c75-4d56-928a-02b7961b8cf4/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:09:16,453 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-31 22:09:16,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:09:16,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-31 22:09:16,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:09:16,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-10-31 22:09:16,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 43 [2024-10-31 22:09:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 179 proven. 3 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2024-10-31 22:09:17,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:09:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4234 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2024-10-31 22:09:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667608960] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:09:18,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:09:18,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 11, 10] total 66 [2024-10-31 22:09:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473470157] [2024-10-31 22:09:18,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:09:18,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-10-31 22:09:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:09:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-10-31 22:09:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1444, Invalid=2846, Unknown=0, NotChecked=0, Total=4290 [2024-10-31 22:09:18,295 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 66 states, 66 states have (on average 2.1818181818181817) internal successors, (144), 66 states have internal predecessors, (144), 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)