./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_92_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_92_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4e5a617c0a379f925027f5036faf7a534daf9af0397b0a1cbe8b3ad005abc899 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:20:26,374 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:20:26,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:20:26,440 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:20:26,441 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:20:26,462 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:20:26,462 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:20:26,463 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:20:26,464 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:20:26,464 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:20:26,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:20:26,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:20:26,466 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:20:26,466 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:20:26,467 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:20:26,467 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:20:26,468 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:20:26,468 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:20:26,469 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:20:26,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:20:26,470 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:20:26,472 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:20:26,473 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:20:26,473 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:20:26,474 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:20:26,474 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:20:26,475 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:20:26,475 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:20:26,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:20:26,476 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:20:26,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:20:26,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:20:26,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:20:26,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:20:26,477 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:20:26,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:20:26,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:20:26,478 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:20:26,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:20:26,478 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:20:26,479 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:20:26,479 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:20:26,479 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_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e5a617c0a379f925027f5036faf7a534daf9af0397b0a1cbe8b3ad005abc899 [2023-11-29 06:20:26,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:20:26,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:20:26,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:20:26,739 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:20:26,739 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:20:26,740 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/neural-networks/cartpole_92_safe.c-amalgamation.i [2023-11-29 06:20:29,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:20:29,793 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:20:29,794 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/sv-benchmarks/c/neural-networks/cartpole_92_safe.c-amalgamation.i [2023-11-29 06:20:29,824 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/data/a16e83cdf/7434e899643d4ce6a314b66f3f58a066/FLAG72dc6d221 [2023-11-29 06:20:29,838 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/data/a16e83cdf/7434e899643d4ce6a314b66f3f58a066 [2023-11-29 06:20:29,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:20:29,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:20:29,844 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:20:29,844 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:20:29,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:20:29,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:20:29" (1/1) ... [2023-11-29 06:20:29,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be33764 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:29, skipping insertion in model container [2023-11-29 06:20:29,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:20:29" (1/1) ... [2023-11-29 06:20:29,929 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:20:30,564 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/sv-benchmarks/c/neural-networks/cartpole_92_safe.c-amalgamation.i[63697,63710] [2023-11-29 06:20:30,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:20:30,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:20:30,973 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/sv-benchmarks/c/neural-networks/cartpole_92_safe.c-amalgamation.i[63697,63710] [2023-11-29 06:20:31,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:20:31,367 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:20:31,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31 WrapperNode [2023-11-29 06:20:31,367 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:20:31,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:20:31,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:20:31,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:20:31,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,445 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,665 INFO L138 Inliner]: procedures = 620, calls = 4746, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-29 06:20:31,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:20:31,666 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:20:31,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:20:31,666 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:20:31,678 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,753 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,819 INFO L175 MemorySlicer]: Split 4721 memory accesses to 12 slices as follows [2, 7, 257, 65, 4097, 65, 129, 3, 10, 13, 3, 70]. 87 percent of accesses are in the largest equivalence class. The 4687 initializations are split as follows [2, 7, 256, 64, 4096, 64, 128, 2, 4, 0, 0, 64]. The 10 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 0, 3, 4, 1, 2]. [2023-11-29 06:20:31,820 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,820 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,906 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,938 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,972 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:20:31,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:20:31,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:20:31,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:20:31,974 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (1/1) ... [2023-11-29 06:20:31,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:20:31,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:32,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:20:32,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:20:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-29 06:20:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-29 06:20:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-29 06:20:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-29 06:20:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-29 06:20:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-29 06:20:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-29 06:20:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-29 06:20:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-29 06:20:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-29 06:20:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-29 06:20:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-29 06:20:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:20:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-29 06:20:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-29 06:20:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-29 06:20:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-29 06:20:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-29 06:20:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-29 06:20:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-29 06:20:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-29 06:20:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-29 06:20:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-29 06:20:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-29 06:20:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-29 06:20:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-29 06:20:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-29 06:20:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-29 06:20:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-29 06:20:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:20:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:20:32,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:20:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:20:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:20:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:20:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-29 06:20:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-29 06:20:32,232 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:20:32,234 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:20:38,177 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:20:38,657 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:20:38,658 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-29 06:20:38,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:20:38 BoogieIcfgContainer [2023-11-29 06:20:38,658 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:20:38,661 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:20:38,661 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:20:38,664 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:20:38,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:20:29" (1/3) ... [2023-11-29 06:20:38,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569feca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:20:38, skipping insertion in model container [2023-11-29 06:20:38,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:20:31" (2/3) ... [2023-11-29 06:20:38,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569feca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:20:38, skipping insertion in model container [2023-11-29 06:20:38,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:20:38" (3/3) ... [2023-11-29 06:20:38,667 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_92_safe.c-amalgamation.i [2023-11-29 06:20:38,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:20:38,686 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:20:38,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:20:38,741 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@215a32f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:20:38,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:20:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 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) [2023-11-29 06:20:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 06:20:38,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:38,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:38,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:38,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:38,758 INFO L85 PathProgramCache]: Analyzing trace with hash -531373804, now seen corresponding path program 1 times [2023-11-29 06:20:38,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:38,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802784101] [2023-11-29 06:20:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:38,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:39,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:39,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802784101] [2023-11-29 06:20:39,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802784101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:39,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:39,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:20:39,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804462739] [2023-11-29 06:20:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:39,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:20:39,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:20:39,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:20:39,687 INFO L87 Difference]: Start difference. First operand has 46 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 45 states have internal predecessors, (80), 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 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2023-11-29 06:20:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:40,034 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2023-11-29 06:20:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:20:40,037 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2023-11-29 06:20:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:40,045 INFO L225 Difference]: With dead ends: 89 [2023-11-29 06:20:40,045 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 06:20:40,047 INFO L412 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 [2023-11-29 06:20:40,051 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:40,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:20:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 06:20:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 06:20:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 43 states have internal predecessors, (61), 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) [2023-11-29 06:20:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-29 06:20:40,081 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 27 [2023-11-29 06:20:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:40,082 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-29 06:20:40,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 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) [2023-11-29 06:20:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-29 06:20:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 06:20:40,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:40,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:40,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:20:40,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:40,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:40,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1087110762, now seen corresponding path program 1 times [2023-11-29 06:20:40,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:40,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116068871] [2023-11-29 06:20:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:40,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:40,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116068871] [2023-11-29 06:20:40,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116068871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:40,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:40,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:20:40,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094222418] [2023-11-29 06:20:40,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:40,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:40,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:40,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:40,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:20:40,794 INFO L87 Difference]: Start difference. First operand 44 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-11-29 06:20:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:41,224 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-11-29 06:20:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2023-11-29 06:20:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:41,226 INFO L225 Difference]: With dead ends: 80 [2023-11-29 06:20:41,226 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 06:20:41,226 INFO L412 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 [2023-11-29 06:20:41,228 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:41,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:20:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 06:20:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 06:20:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 43 states have internal predecessors, (60), 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) [2023-11-29 06:20:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-29 06:20:41,235 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 27 [2023-11-29 06:20:41,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:41,236 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-29 06:20:41,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-11-29 06:20:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-11-29 06:20:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 06:20:41,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:41,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:41,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 06:20:41,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:41,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:41,238 INFO L85 PathProgramCache]: Analyzing trace with hash -269462312, now seen corresponding path program 1 times [2023-11-29 06:20:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:41,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384044233] [2023-11-29 06:20:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:41,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:42,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:42,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384044233] [2023-11-29 06:20:42,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384044233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:20:42,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:20:42,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:20:42,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57818791] [2023-11-29 06:20:42,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:42,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:42,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:20:42,208 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-11-29 06:20:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:42,503 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-11-29 06:20:42,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:42,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2023-11-29 06:20:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:42,505 INFO L225 Difference]: With dead ends: 75 [2023-11-29 06:20:42,505 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 06:20:42,506 INFO L412 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 [2023-11-29 06:20:42,507 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:42,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:20:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 06:20:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-29 06:20:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 44 states have internal predecessors, (61), 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) [2023-11-29 06:20:42,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-29 06:20:42,515 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 27 [2023-11-29 06:20:42,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:42,515 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-29 06:20:42,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2023-11-29 06:20:42,515 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-29 06:20:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 06:20:42,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:42,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:42,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:20:42,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:42,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:42,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1144208086, now seen corresponding path program 1 times [2023-11-29 06:20:42,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960013484] [2023-11-29 06:20:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:42,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:43,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:43,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960013484] [2023-11-29 06:20:43,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960013484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:43,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320279137] [2023-11-29 06:20:43,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:43,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:43,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:43,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:43,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:20:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:44,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 5408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:20:44,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:20:44,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:20:44,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320279137] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:44,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:44,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 06:20:44,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075533749] [2023-11-29 06:20:44,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:44,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:44,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:44,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:20:44,870 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-29 06:20:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:45,197 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-29 06:20:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2023-11-29 06:20:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:45,198 INFO L225 Difference]: With dead ends: 66 [2023-11-29 06:20:45,198 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 06:20:45,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:20:45,200 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:45,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:20:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 06:20:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-29 06:20:45,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 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) [2023-11-29 06:20:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-29 06:20:45,207 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 28 [2023-11-29 06:20:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:45,208 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-29 06:20:45,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-29 06:20:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-29 06:20:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 06:20:45,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:45,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:45,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:20:45,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:45,410 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:45,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash -372313272, now seen corresponding path program 1 times [2023-11-29 06:20:45,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:45,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273898153] [2023-11-29 06:20:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:45,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:20:46,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:46,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273898153] [2023-11-29 06:20:46,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273898153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:46,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815205774] [2023-11-29 06:20:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:46,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:46,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:46,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:46,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:20:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:47,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:20:47,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:20:47,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:20:47,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815205774] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:47,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:47,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 06:20:47,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205916522] [2023-11-29 06:20:47,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:47,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:47,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:47,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:20:47,986 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-29 06:20:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:48,261 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-29 06:20:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 31 [2023-11-29 06:20:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:48,262 INFO L225 Difference]: With dead ends: 57 [2023-11-29 06:20:48,262 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 06:20:48,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:20:48,264 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:48,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:20:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 06:20:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-29 06:20:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 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) [2023-11-29 06:20:48,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-29 06:20:48,270 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2023-11-29 06:20:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:48,270 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-29 06:20:48,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-29 06:20:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-29 06:20:48,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 06:20:48,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:48,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:48,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:20:48,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:48,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:48,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2044304526, now seen corresponding path program 1 times [2023-11-29 06:20:48,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:48,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484954559] [2023-11-29 06:20:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:48,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:20:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:49,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484954559] [2023-11-29 06:20:49,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484954559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:49,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25557365] [2023-11-29 06:20:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:49,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:49,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:49,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:20:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:50,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:20:50,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 06:20:50,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:20:50,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25557365] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:50,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:50,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 06:20:50,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504112232] [2023-11-29 06:20:50,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:50,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:50,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:50,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:20:50,595 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-11-29 06:20:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:50,888 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-11-29 06:20:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 34 [2023-11-29 06:20:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:50,890 INFO L225 Difference]: With dead ends: 74 [2023-11-29 06:20:50,890 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 06:20:50,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:20:50,891 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:50,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:20:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 06:20:50,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-29 06:20:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 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) [2023-11-29 06:20:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-29 06:20:50,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 34 [2023-11-29 06:20:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:50,895 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-29 06:20:50,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-11-29 06:20:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-29 06:20:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 06:20:50,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:50,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:50,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:20:51,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:20:51,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:51,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash -359810836, now seen corresponding path program 1 times [2023-11-29 06:20:51,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:51,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030150909] [2023-11-29 06:20:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:51,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:20:51,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:51,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030150909] [2023-11-29 06:20:51,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030150909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:51,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504859033] [2023-11-29 06:20:51,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:51,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:51,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:51,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:51,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:20:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:53,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 5450 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:20:53,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 06:20:53,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:20:53,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504859033] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:53,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:53,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 06:20:53,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915614708] [2023-11-29 06:20:53,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:53,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:53,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:53,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:53,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:20:53,207 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-29 06:20:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:53,502 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-11-29 06:20:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:53,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 37 [2023-11-29 06:20:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:53,503 INFO L225 Difference]: With dead ends: 64 [2023-11-29 06:20:53,503 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 06:20:53,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:20:53,504 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:53,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:20:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 06:20:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 06:20:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 48 states have internal predecessors, (65), 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) [2023-11-29 06:20:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-29 06:20:53,510 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 37 [2023-11-29 06:20:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:53,511 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-29 06:20:53,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-11-29 06:20:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-29 06:20:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 06:20:53,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:53,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:53,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:20:53,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:20:53,713 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:53,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash 242160194, now seen corresponding path program 1 times [2023-11-29 06:20:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:53,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227890046] [2023-11-29 06:20:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:20:54,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227890046] [2023-11-29 06:20:54,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227890046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:54,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810121009] [2023-11-29 06:20:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:54,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:54,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:54,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:54,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:20:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:55,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 5456 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:20:55,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:20:55,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:20:55,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810121009] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:55,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:55,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 06:20:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722730758] [2023-11-29 06:20:55,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:55,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:20:55,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:20:55,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:20:55,598 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-29 06:20:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:55,846 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-29 06:20:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:20:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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 40 [2023-11-29 06:20:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:55,847 INFO L225 Difference]: With dead ends: 54 [2023-11-29 06:20:55,847 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 06:20:55,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:20:55,848 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:55,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:20:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 06:20:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-29 06:20:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 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) [2023-11-29 06:20:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-29 06:20:55,852 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2023-11-29 06:20:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:55,853 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-29 06:20:55,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-29 06:20:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-29 06:20:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 06:20:55,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:55,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:55,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 06:20:56,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:56,055 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:56,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:56,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1371144433, now seen corresponding path program 1 times [2023-11-29 06:20:56,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:56,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761396772] [2023-11-29 06:20:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:56,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:20:56,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:56,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761396772] [2023-11-29 06:20:56,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761396772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:56,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455495340] [2023-11-29 06:20:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:56,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:56,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:56,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:56,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:20:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:57,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 5462 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:20:57,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:20:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 06:20:57,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:20:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:20:57,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455495340] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:57,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:20:57,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2023-11-29 06:20:57,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508639641] [2023-11-29 06:20:57,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:20:57,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:20:57,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:20:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:20:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:20:57,964 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2023-11-29 06:20:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:20:58,229 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2023-11-29 06:20:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:20:58,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 43 [2023-11-29 06:20:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:20:58,230 INFO L225 Difference]: With dead ends: 60 [2023-11-29 06:20:58,230 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 06:20:58,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:20:58,231 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:20:58,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:20:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 06:20:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-29 06:20:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 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) [2023-11-29 06:20:58,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2023-11-29 06:20:58,237 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 43 [2023-11-29 06:20:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:20:58,238 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2023-11-29 06:20:58,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2023-11-29 06:20:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2023-11-29 06:20:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 06:20:58,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:20:58,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:20:58,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:20:58,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 06:20:58,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:20:58,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:20:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1175858717, now seen corresponding path program 1 times [2023-11-29 06:20:58,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:20:58,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174532546] [2023-11-29 06:20:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:58,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:20:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:20:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:20:59,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:20:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174532546] [2023-11-29 06:20:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174532546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:20:59,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045816695] [2023-11-29 06:20:59,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:20:59,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:20:59,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:20:59,072 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:20:59,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:21:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:00,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 5476 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:21:00,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:21:00,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 06:21:00,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045816695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:00,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:00,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 06:21:00,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405124308] [2023-11-29 06:21:00,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:21:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:00,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:21:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:21:00,197 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 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) [2023-11-29 06:21:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:00,597 INFO L93 Difference]: Finished difference Result 97 states and 132 transitions. [2023-11-29 06:21:00,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:21:00,598 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 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 46 [2023-11-29 06:21:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:00,598 INFO L225 Difference]: With dead ends: 97 [2023-11-29 06:21:00,598 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 06:21:00,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:21:00,599 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:00,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 193 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:21:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 06:21:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 06:21:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 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) [2023-11-29 06:21:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-29 06:21:00,604 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 46 [2023-11-29 06:21:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:00,604 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-29 06:21:00,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 states have internal predecessors, (64), 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) [2023-11-29 06:21:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-29 06:21:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 06:21:00,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:00,606 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:00,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:21:00,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:21:00,806 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:00,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1861807109, now seen corresponding path program 2 times [2023-11-29 06:21:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277877938] [2023-11-29 06:21:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 06:21:01,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277877938] [2023-11-29 06:21:01,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277877938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:01,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228922230] [2023-11-29 06:21:01,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:21:01,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:01,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:01,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:01,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:21:02,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:02,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:02,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 5541 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:21:02,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 06:21:02,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-29 06:21:02,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228922230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:02,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:02,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-29 06:21:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686787556] [2023-11-29 06:21:02,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:02,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:21:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:21:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:21:02,749 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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) [2023-11-29 06:21:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:03,181 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2023-11-29 06:21:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:21:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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 56 [2023-11-29 06:21:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:03,182 INFO L225 Difference]: With dead ends: 116 [2023-11-29 06:21:03,182 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 06:21:03,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:21:03,183 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:03,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 192 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:21:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 06:21:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-29 06:21:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 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) [2023-11-29 06:21:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2023-11-29 06:21:03,191 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 56 [2023-11-29 06:21:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:03,191 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2023-11-29 06:21:03,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 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) [2023-11-29 06:21:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2023-11-29 06:21:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 06:21:03,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:03,193 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:03,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:21:03,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:21:03,394 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:03,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash -78359747, now seen corresponding path program 3 times [2023-11-29 06:21:03,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:03,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578985793] [2023-11-29 06:21:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:03,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 06:21:04,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:04,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578985793] [2023-11-29 06:21:04,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578985793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:04,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173508957] [2023-11-29 06:21:04,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:21:04,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:04,392 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:04,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:21:05,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:21:05,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:05,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 5473 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:21:05,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 06:21:05,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 06:21:05,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173508957] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:05,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:05,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 10 [2023-11-29 06:21:05,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375773078] [2023-11-29 06:21:05,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:05,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:05,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:21:05,738 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-11-29 06:21:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:06,020 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2023-11-29 06:21:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:21:06,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 66 [2023-11-29 06:21:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:06,021 INFO L225 Difference]: With dead ends: 124 [2023-11-29 06:21:06,021 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 06:21:06,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:21:06,022 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:06,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:21:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 06:21:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-29 06:21:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.323943661971831) internal successors, (94), 71 states have internal predecessors, (94), 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) [2023-11-29 06:21:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2023-11-29 06:21:06,027 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 66 [2023-11-29 06:21:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:06,027 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2023-11-29 06:21:06,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-11-29 06:21:06,028 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2023-11-29 06:21:06,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 06:21:06,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:06,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:06,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:21:06,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:06,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:06,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:06,230 INFO L85 PathProgramCache]: Analyzing trace with hash 141608377, now seen corresponding path program 1 times [2023-11-29 06:21:06,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:06,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336586781] [2023-11-29 06:21:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:06,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-29 06:21:07,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:07,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336586781] [2023-11-29 06:21:07,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336586781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:07,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704297261] [2023-11-29 06:21:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:07,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:07,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:07,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:07,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:21:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:08,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 5620 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 06:21:08,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-29 06:21:08,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-29 06:21:08,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704297261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:08,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:08,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 13 [2023-11-29 06:21:08,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087700814] [2023-11-29 06:21:08,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:08,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:21:08,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:08,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:21:08,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:21:08,397 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 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) [2023-11-29 06:21:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:09,204 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2023-11-29 06:21:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:21:09,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 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 69 [2023-11-29 06:21:09,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:09,206 INFO L225 Difference]: With dead ends: 132 [2023-11-29 06:21:09,206 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 06:21:09,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:21:09,207 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:09,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 401 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:21:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 06:21:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-29 06:21:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 76 states have internal predecessors, (100), 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) [2023-11-29 06:21:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2023-11-29 06:21:09,215 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 69 [2023-11-29 06:21:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:09,215 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2023-11-29 06:21:09,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 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) [2023-11-29 06:21:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2023-11-29 06:21:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-29 06:21:09,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:09,216 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:09,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 06:21:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:21:09,417 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:09,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1160223902, now seen corresponding path program 1 times [2023-11-29 06:21:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775331415] [2023-11-29 06:21:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 06:21:10,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:10,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775331415] [2023-11-29 06:21:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775331415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:10,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101874414] [2023-11-29 06:21:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:10,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:10,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:10,494 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:10,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:21:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:11,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 5654 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 06:21:11,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 06:21:11,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-29 06:21:11,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101874414] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:11,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:11,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 7] total 18 [2023-11-29 06:21:11,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305791970] [2023-11-29 06:21:11,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:11,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:21:11,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:11,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:21:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:21:11,789 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 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) [2023-11-29 06:21:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:12,881 INFO L93 Difference]: Finished difference Result 133 states and 181 transitions. [2023-11-29 06:21:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:21:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 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 74 [2023-11-29 06:21:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:12,883 INFO L225 Difference]: With dead ends: 133 [2023-11-29 06:21:12,883 INFO L226 Difference]: Without dead ends: 100 [2023-11-29 06:21:12,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:21:12,884 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 43 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:12,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 597 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:21:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-29 06:21:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2023-11-29 06:21:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 97 states have internal predecessors, (128), 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) [2023-11-29 06:21:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2023-11-29 06:21:12,893 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 74 [2023-11-29 06:21:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:12,893 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2023-11-29 06:21:12,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.611111111111111) internal successors, (101), 18 states have internal predecessors, (101), 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) [2023-11-29 06:21:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2023-11-29 06:21:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 06:21:12,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:12,895 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:12,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:21:13,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:13,096 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:13,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1889764462, now seen corresponding path program 2 times [2023-11-29 06:21:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:13,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014041467] [2023-11-29 06:21:13,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:13,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-11-29 06:21:14,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:14,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014041467] [2023-11-29 06:21:14,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014041467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:14,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530644093] [2023-11-29 06:21:14,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:21:14,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:14,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:14,271 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:14,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:21:15,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:15,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:15,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 5780 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 06:21:15,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-11-29 06:21:15,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-29 06:21:15,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530644093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:15,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:15,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 16] total 24 [2023-11-29 06:21:15,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176188168] [2023-11-29 06:21:15,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:15,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 06:21:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 06:21:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:21:15,943 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 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) [2023-11-29 06:21:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:17,691 INFO L93 Difference]: Finished difference Result 173 states and 235 transitions. [2023-11-29 06:21:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:21:17,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 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 95 [2023-11-29 06:21:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:17,693 INFO L225 Difference]: With dead ends: 173 [2023-11-29 06:21:17,693 INFO L226 Difference]: Without dead ends: 122 [2023-11-29 06:21:17,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:21:17,694 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 71 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:17,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 721 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 06:21:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-29 06:21:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-29 06:21:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.322314049586777) internal successors, (160), 121 states have internal predecessors, (160), 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) [2023-11-29 06:21:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 160 transitions. [2023-11-29 06:21:17,703 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 160 transitions. Word has length 95 [2023-11-29 06:21:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:17,703 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 160 transitions. [2023-11-29 06:21:17,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.458333333333333) internal successors, (107), 24 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) [2023-11-29 06:21:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 160 transitions. [2023-11-29 06:21:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 06:21:17,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:17,705 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:17,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:21:17,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:17,906 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:17,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash -318599790, now seen corresponding path program 3 times [2023-11-29 06:21:17,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:17,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027413092] [2023-11-29 06:21:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:17,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-11-29 06:21:19,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:19,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027413092] [2023-11-29 06:21:19,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027413092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:19,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082190225] [2023-11-29 06:21:19,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:21:19,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:19,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:19,720 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:19,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:21:20,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:21:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:20,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 5473 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:21:20,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2023-11-29 06:21:20,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2023-11-29 06:21:20,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082190225] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:20,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:21:20,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17, 5] total 22 [2023-11-29 06:21:20,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281675628] [2023-11-29 06:21:20,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:21:20,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:21:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:21:20,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:21:20,984 INFO L87 Difference]: Start difference. First operand 122 states and 160 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2023-11-29 06:21:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:21,259 INFO L93 Difference]: Finished difference Result 172 states and 227 transitions. [2023-11-29 06:21:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:21:21,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 119 [2023-11-29 06:21:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:21,260 INFO L225 Difference]: With dead ends: 172 [2023-11-29 06:21:21,260 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 06:21:21,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-11-29 06:21:21,261 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:21,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:21:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 06:21:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-11-29 06:21:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.319672131147541) internal successors, (161), 122 states have internal predecessors, (161), 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) [2023-11-29 06:21:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2023-11-29 06:21:21,270 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 119 [2023-11-29 06:21:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:21,270 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2023-11-29 06:21:21,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2023-11-29 06:21:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2023-11-29 06:21:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 06:21:21,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:21,272 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 10, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:21,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:21:21,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:21,472 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:21,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1502731541, now seen corresponding path program 1 times [2023-11-29 06:21:21,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:21,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386974705] [2023-11-29 06:21:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-29 06:21:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386974705] [2023-11-29 06:21:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386974705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420260786] [2023-11-29 06:21:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:23,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:23,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:23,177 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:23,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:21:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:24,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 5938 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 06:21:24,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 414 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 06:21:24,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-11-29 06:21:25,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420260786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:25,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:25,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 13] total 39 [2023-11-29 06:21:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548815613] [2023-11-29 06:21:25,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:25,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 06:21:25,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:25,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 06:21:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:21:25,041 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 39 states, 39 states have (on average 4.358974358974359) internal successors, (170), 39 states have internal predecessors, (170), 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) [2023-11-29 06:21:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:21:31,978 INFO L93 Difference]: Finished difference Result 216 states and 297 transitions. [2023-11-29 06:21:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 06:21:31,978 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.358974358974359) internal successors, (170), 39 states have internal predecessors, (170), 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 122 [2023-11-29 06:21:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:21:31,980 INFO L225 Difference]: With dead ends: 216 [2023-11-29 06:21:31,980 INFO L226 Difference]: Without dead ends: 164 [2023-11-29 06:21:31,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=450, Invalid=1902, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 06:21:31,981 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 136 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 2430 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:21:31,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1539 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2430 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 06:21:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-29 06:21:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2023-11-29 06:21:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.3229813664596273) internal successors, (213), 161 states have internal predecessors, (213), 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) [2023-11-29 06:21:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 213 transitions. [2023-11-29 06:21:31,988 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 213 transitions. Word has length 122 [2023-11-29 06:21:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:21:31,988 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 213 transitions. [2023-11-29 06:21:31,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.358974358974359) internal successors, (170), 39 states have internal predecessors, (170), 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) [2023-11-29 06:21:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 213 transitions. [2023-11-29 06:21:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-29 06:21:31,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:21:31,990 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 15, 15, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:21:32,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:21:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:32,190 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:21:32,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:21:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -472678903, now seen corresponding path program 2 times [2023-11-29 06:21:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:21:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515539989] [2023-11-29 06:21:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:21:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:21:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:21:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2023-11-29 06:21:33,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:21:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515539989] [2023-11-29 06:21:33,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515539989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:21:33,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576790453] [2023-11-29 06:21:33,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:21:33,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:21:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:21:33,978 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:21:33,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:21:35,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:21:35,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:21:35,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 6172 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 06:21:35,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:21:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2023-11-29 06:21:35,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:21:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 322 proven. 660 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-29 06:21:36,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576790453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:21:36,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:21:36,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 34] total 51 [2023-11-29 06:21:36,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290739701] [2023-11-29 06:21:36,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:21:36,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-29 06:21:36,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:21:36,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-29 06:21:36,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 06:21:36,773 INFO L87 Difference]: Start difference. First operand 162 states and 213 transitions. Second operand has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 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) [2023-11-29 06:22:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:08,144 INFO L93 Difference]: Finished difference Result 301 states and 414 transitions. [2023-11-29 06:22:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 06:22:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 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 161 [2023-11-29 06:22:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:08,146 INFO L225 Difference]: With dead ends: 301 [2023-11-29 06:22:08,146 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 06:22:08,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=912, Invalid=3378, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 06:22:08,148 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 298 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:08,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1755 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 06:22:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 06:22:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-11-29 06:22:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.3254716981132075) internal successors, (281), 212 states have internal predecessors, (281), 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) [2023-11-29 06:22:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 281 transitions. [2023-11-29 06:22:08,156 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 281 transitions. Word has length 161 [2023-11-29 06:22:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:08,156 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 281 transitions. [2023-11-29 06:22:08,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 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) [2023-11-29 06:22:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 281 transitions. [2023-11-29 06:22:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-29 06:22:08,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:08,158 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 22, 22, 22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:08,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 06:22:08,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:08,358 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:08,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1237238293, now seen corresponding path program 3 times [2023-11-29 06:22:08,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:08,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100033564] [2023-11-29 06:22:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:08,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2023-11-29 06:22:11,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:11,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100033564] [2023-11-29 06:22:11,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100033564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:11,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574191048] [2023-11-29 06:22:11,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:22:11,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:11,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:11,869 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:11,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:22:13,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:22:13,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:22:13,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:22:13,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2023-11-29 06:22:14,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2250 trivial. 0 not checked. [2023-11-29 06:22:14,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574191048] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:14,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:22:14,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [35, 6] total 41 [2023-11-29 06:22:14,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666661709] [2023-11-29 06:22:14,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:22:14,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:22:14,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:14,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:22:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 06:22:14,138 INFO L87 Difference]: Start difference. First operand 213 states and 281 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-29 06:22:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:22:14,439 INFO L93 Difference]: Finished difference Result 300 states and 397 transitions. [2023-11-29 06:22:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:22:14,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 212 [2023-11-29 06:22:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:22:14,441 INFO L225 Difference]: With dead ends: 300 [2023-11-29 06:22:14,441 INFO L226 Difference]: Without dead ends: 214 [2023-11-29 06:22:14,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 06:22:14,443 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:22:14,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:22:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-29 06:22:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2023-11-29 06:22:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.323943661971831) internal successors, (282), 213 states have internal predecessors, (282), 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) [2023-11-29 06:22:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 282 transitions. [2023-11-29 06:22:14,454 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 282 transitions. Word has length 212 [2023-11-29 06:22:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:22:14,455 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 282 transitions. [2023-11-29 06:22:14,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2023-11-29 06:22:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 282 transitions. [2023-11-29 06:22:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2023-11-29 06:22:14,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:22:14,456 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 22, 22, 22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:22:14,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:22:14,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:14,657 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:22:14,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:22:14,657 INFO L85 PathProgramCache]: Analyzing trace with hash 178071926, now seen corresponding path program 1 times [2023-11-29 06:22:14,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:22:14,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649058859] [2023-11-29 06:22:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:14,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:22:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2253 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2023-11-29 06:22:18,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:22:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649058859] [2023-11-29 06:22:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649058859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:22:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670813712] [2023-11-29 06:22:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:22:18,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:22:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:22:18,290 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:22:18,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:22:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:22:19,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 6483 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 06:22:19,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:22:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2253 backedges. 0 proven. 2100 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 06:22:20,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:22:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2253 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1538 trivial. 0 not checked. [2023-11-29 06:22:22,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670813712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:22:22,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:22:22,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 48, 25] total 81 [2023-11-29 06:22:22,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4371278] [2023-11-29 06:22:22,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:22:22,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-11-29 06:22:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:22:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-11-29 06:22:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=5760, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 06:22:22,678 INFO L87 Difference]: Start difference. First operand 214 states and 282 transitions. Second operand has 81 states, 81 states have (on average 3.6790123456790123) internal successors, (298), 81 states have internal predecessors, (298), 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) [2023-11-29 06:25:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:25:10,585 INFO L93 Difference]: Finished difference Result 380 states and 527 transitions. [2023-11-29 06:25:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 06:25:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.6790123456790123) internal successors, (298), 81 states have internal predecessors, (298), 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 213 [2023-11-29 06:25:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:25:10,588 INFO L225 Difference]: With dead ends: 380 [2023-11-29 06:25:10,588 INFO L226 Difference]: Without dead ends: 291 [2023-11-29 06:25:10,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 165.5s TimeCoverageRelationStatistics Valid=1776, Invalid=8730, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 06:25:10,591 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 580 mSDsluCounter, 4464 mSDsCounter, 0 mSdLazyCounter, 9550 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 9552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:25:10,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 4554 Invalid, 9552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9550 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-29 06:25:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-29 06:25:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2023-11-29 06:25:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.3263888888888888) internal successors, (382), 288 states have internal predecessors, (382), 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) [2023-11-29 06:25:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 382 transitions. [2023-11-29 06:25:10,602 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 382 transitions. Word has length 213 [2023-11-29 06:25:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:25:10,603 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 382 transitions. [2023-11-29 06:25:10,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.6790123456790123) internal successors, (298), 81 states have internal predecessors, (298), 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) [2023-11-29 06:25:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 382 transitions. [2023-11-29 06:25:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-11-29 06:25:10,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:25:10,604 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 33, 33, 33, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:25:10,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:25:10,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:10,805 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:25:10,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:25:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash -552052350, now seen corresponding path program 2 times [2023-11-29 06:25:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:25:10,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108208184] [2023-11-29 06:25:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:25:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:25:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:25:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4786 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 3169 trivial. 0 not checked. [2023-11-29 06:25:15,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:25:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108208184] [2023-11-29 06:25:15,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108208184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:25:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328356677] [2023-11-29 06:25:15,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:25:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:25:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:25:15,099 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:25:15,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:25:16,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:25:16,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:25:16,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 6933 conjuncts, 138 conjunts are in the unsatisfiable core [2023-11-29 06:25:16,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:25:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4786 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 3169 trivial. 0 not checked. [2023-11-29 06:25:16,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:25:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4786 backedges. 1300 proven. 3234 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-11-29 06:25:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328356677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:25:22,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:25:22,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 70] total 105 [2023-11-29 06:25:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252265346] [2023-11-29 06:25:22,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:25:22,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-29 06:25:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:25:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-29 06:25:22,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1422, Invalid=9498, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 06:25:22,407 INFO L87 Difference]: Start difference. First operand 289 states and 382 transitions. Second operand has 105 states, 105 states have (on average 3.3714285714285714) internal successors, (354), 105 states have internal predecessors, (354), 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) [2023-11-29 06:34:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:34:52,615 INFO L93 Difference]: Finished difference Result 543 states and 750 transitions. [2023-11-29 06:34:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 06:34:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.3714285714285714) internal successors, (354), 105 states have internal predecessors, (354), 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 288 [2023-11-29 06:34:52,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:34:52,617 INFO L225 Difference]: With dead ends: 543 [2023-11-29 06:34:52,617 INFO L226 Difference]: Without dead ends: 382 [2023-11-29 06:34:52,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 569.9s TimeCoverageRelationStatistics Valid=3363, Invalid=14456, Unknown=3, NotChecked=0, Total=17822 [2023-11-29 06:34:52,622 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 969 mSDsluCounter, 4726 mSDsCounter, 0 mSdLazyCounter, 8192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 4798 SdHoareTripleChecker+Invalid, 8194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:34:52,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 4798 Invalid, 8194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8192 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-29 06:34:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-29 06:34:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2023-11-29 06:34:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.3280839895013123) internal successors, (506), 381 states have internal predecessors, (506), 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) [2023-11-29 06:34:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 506 transitions. [2023-11-29 06:34:52,636 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 506 transitions. Word has length 288 [2023-11-29 06:34:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:34:52,637 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 506 transitions. [2023-11-29 06:34:52,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.3714285714285714) internal successors, (354), 105 states have internal predecessors, (354), 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) [2023-11-29 06:34:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 506 transitions. [2023-11-29 06:34:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2023-11-29 06:34:52,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:34:52,639 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 46, 46, 46, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:34:52,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:34:52,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:52,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:34:52,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:34:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash 202543990, now seen corresponding path program 3 times [2023-11-29 06:34:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:34:52,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818686351] [2023-11-29 06:34:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:34:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:34:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:34:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9281 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 6130 trivial. 0 not checked. [2023-11-29 06:34:59,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:34:59,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818686351] [2023-11-29 06:34:59,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818686351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:34:59,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627396482] [2023-11-29 06:34:59,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:34:59,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:34:59,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:34:59,545 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:34:59,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:35:02,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:35:02,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:35:02,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:35:02,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:35:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9281 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9273 trivial. 0 not checked. [2023-11-29 06:35:02,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:35:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9281 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9279 trivial. 0 not checked. [2023-11-29 06:35:02,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627396482] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:02,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:35:02,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [49, 6] total 55 [2023-11-29 06:35:02,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083318570] [2023-11-29 06:35:02,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:35:02,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:35:02,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:35:02,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:35:02,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 06:35:02,418 INFO L87 Difference]: Start difference. First operand 382 states and 506 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) [2023-11-29 06:35:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:35:02,700 INFO L93 Difference]: Finished difference Result 393 states and 520 transitions. [2023-11-29 06:35:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:35:02,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) Word has length 381 [2023-11-29 06:35:02,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:35:02,703 INFO L225 Difference]: With dead ends: 393 [2023-11-29 06:35:02,703 INFO L226 Difference]: Without dead ends: 383 [2023-11-29 06:35:02,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 756 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 06:35:02,704 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:35:02,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:35:02,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-11-29 06:35:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2023-11-29 06:35:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.3272251308900525) internal successors, (507), 382 states have internal predecessors, (507), 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) [2023-11-29 06:35:02,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 507 transitions. [2023-11-29 06:35:02,718 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 507 transitions. Word has length 381 [2023-11-29 06:35:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:35:02,718 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 507 transitions. [2023-11-29 06:35:02,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 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) [2023-11-29 06:35:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 507 transitions. [2023-11-29 06:35:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2023-11-29 06:35:02,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:35:02,720 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 46, 46, 46, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:35:02,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:35:02,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 06:35:02,921 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:35:02,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:35:02,921 INFO L85 PathProgramCache]: Analyzing trace with hash -660623767, now seen corresponding path program 1 times [2023-11-29 06:35:02,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:35:02,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907715297] [2023-11-29 06:35:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:02,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:35:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:35:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9282 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 6131 trivial. 0 not checked. [2023-11-29 06:35:09,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:35:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907715297] [2023-11-29 06:35:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907715297] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:35:09,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159431725] [2023-11-29 06:35:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:35:09,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:35:09,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:35:09,600 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:35:09,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da7c2da7-eab4-484d-b864-ce8fd8901e05/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process