./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_96_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_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/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_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_96_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/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_9c6b9d0b-a514-4547-9531-66ac10652094/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 2f41471c4e6a9783f102d2425aecd4c9f9e271d08576324e43bcb68f0343d773 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:06:32,067 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:06:32,130 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:06:32,134 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:06:32,135 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:06:32,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:06:32,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:06:32,160 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:06:32,161 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:06:32,162 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:06:32,162 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:06:32,163 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:06:32,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:06:32,164 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:06:32,165 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:06:32,166 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:06:32,166 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:06:32,167 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:06:32,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:06:32,168 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:06:32,169 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:06:32,169 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:06:32,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:06:32,170 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:06:32,171 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:06:32,171 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:06:32,171 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:06:32,172 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:06:32,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:06:32,173 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:06:32,173 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:06:32,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:06:32,174 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:06:32,174 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:06:32,174 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:06:32,175 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:06:32,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:06:32,175 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:06:32,175 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:06:32,175 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:06:32,176 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:06:32,176 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:06:32,177 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_9c6b9d0b-a514-4547-9531-66ac10652094/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f41471c4e6a9783f102d2425aecd4c9f9e271d08576324e43bcb68f0343d773 [2023-11-29 00:06:32,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:06:32,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:06:32,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:06:32,409 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:06:32,410 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:06:32,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/neural-networks/cartpole_96_safe.c-amalgamation.i [2023-11-29 00:06:35,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:06:35,573 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:06:35,573 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/sv-benchmarks/c/neural-networks/cartpole_96_safe.c-amalgamation.i [2023-11-29 00:06:35,598 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/data/ba80bd5c1/9ebff7ad684a4b50a66affdca2d3e1e5/FLAG5a784347f [2023-11-29 00:06:35,612 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/data/ba80bd5c1/9ebff7ad684a4b50a66affdca2d3e1e5 [2023-11-29 00:06:35,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:06:35,616 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:06:35,618 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:06:35,618 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:06:35,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:06:35,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:06:35" (1/1) ... [2023-11-29 00:06:35,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6064fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:35, skipping insertion in model container [2023-11-29 00:06:35,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:06:35" (1/1) ... [2023-11-29 00:06:35,709 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:06:36,452 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_9c6b9d0b-a514-4547-9531-66ac10652094/sv-benchmarks/c/neural-networks/cartpole_96_safe.c-amalgamation.i[63704,63717] [2023-11-29 00:06:36,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:06:36,753 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:06:36,795 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_9c6b9d0b-a514-4547-9531-66ac10652094/sv-benchmarks/c/neural-networks/cartpole_96_safe.c-amalgamation.i[63704,63717] [2023-11-29 00:06:36,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:06:37,156 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:06:37,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37 WrapperNode [2023-11-29 00:06:37,157 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:06:37,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:06:37,158 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:06:37,158 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:06:37,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,239 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,440 INFO L138 Inliner]: procedures = 620, calls = 4746, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-29 00:06:37,440 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:06:37,441 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:06:37,441 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:06:37,441 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:06:37,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,490 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,545 INFO L175 MemorySlicer]: Split 4721 memory accesses to 12 slices as follows [2, 7, 257, 65, 4097, 65, 129, 3, 13, 10, 70, 3]. 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, 0, 4, 64, 0]. The 10 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 0, 4, 3, 2, 1]. [2023-11-29 00:06:37,545 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,545 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,663 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,683 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,693 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,727 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:06:37,729 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:06:37,729 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:06:37,729 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:06:37,730 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (1/1) ... [2023-11-29 00:06:37,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:06:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:37,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:06:37,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:06:37,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-29 00:06:37,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-29 00:06:37,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-29 00:06:37,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-29 00:06:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-29 00:06:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-29 00:06:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-29 00:06:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-29 00:06:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-29 00:06:37,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-29 00:06:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-29 00:06:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-29 00:06:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:06:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-29 00:06:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-29 00:06:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-29 00:06:37,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-29 00:06:37,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-29 00:06:37,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-29 00:06:37,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-29 00:06:37,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-29 00:06:37,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-29 00:06:37,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-29 00:06:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-29 00:06:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-29 00:06:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-29 00:06:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-29 00:06:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-29 00:06:37,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-29 00:06:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-29 00:06:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-29 00:06:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-29 00:06:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-29 00:06:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-29 00:06:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-29 00:06:37,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-29 00:06:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-29 00:06:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:06:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:06:37,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:06:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:06:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:06:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:06:37,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:06:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:06:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 00:06:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 00:06:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 00:06:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 00:06:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-29 00:06:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-29 00:06:37,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-29 00:06:37,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-29 00:06:38,046 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:06:38,049 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:06:44,393 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:06:44,718 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:06:44,718 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-29 00:06:44,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:06:44 BoogieIcfgContainer [2023-11-29 00:06:44,719 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:06:44,721 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:06:44,721 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:06:44,724 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:06:44,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:06:35" (1/3) ... [2023-11-29 00:06:44,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739b2dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:06:44, skipping insertion in model container [2023-11-29 00:06:44,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:06:37" (2/3) ... [2023-11-29 00:06:44,726 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739b2dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:06:44, skipping insertion in model container [2023-11-29 00:06:44,726 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:06:44" (3/3) ... [2023-11-29 00:06:44,727 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_96_safe.c-amalgamation.i [2023-11-29 00:06:44,747 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:06:44,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:06:44,797 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:06:44,804 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;@75499b66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:06:44,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:06:44,809 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 00:06:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:06:44,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:44,818 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 00:06:44,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:44,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:44,825 INFO L85 PathProgramCache]: Analyzing trace with hash -531373804, now seen corresponding path program 1 times [2023-11-29 00:06:44,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:44,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958395814] [2023-11-29 00:06:44,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:44,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:45,766 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 00:06:45,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:45,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958395814] [2023-11-29 00:06:45,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958395814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:06:45,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:06:45,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:06:45,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519288016] [2023-11-29 00:06:45,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:06:45,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:06:45,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:45,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:06:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:06:45,803 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 00:06:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:06:46,120 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2023-11-29 00:06:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:06:46,123 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 00:06:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:06:46,132 INFO L225 Difference]: With dead ends: 89 [2023-11-29 00:06:46,132 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 00:06:46,136 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 00:06:46,141 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 00:06:46,143 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 00:06:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 00:06:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 00:06:46,172 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 00:06:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-29 00:06:46,174 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 27 [2023-11-29 00:06:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:06:46,175 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-29 00:06:46,175 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 00:06:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-29 00:06:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:06:46,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:46,177 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 00:06:46,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:06:46,177 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:46,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1087110762, now seen corresponding path program 1 times [2023-11-29 00:06:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:46,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767683791] [2023-11-29 00:06:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:46,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:46,958 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 00:06:46,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:46,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767683791] [2023-11-29 00:06:46,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767683791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:06:46,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:06:46,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:06:46,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054078956] [2023-11-29 00:06:46,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:06:46,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:06:46,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:46,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:06:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:06:46,963 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 00:06:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:06:47,411 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-11-29 00:06:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:06:47,411 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 00:06:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:06:47,412 INFO L225 Difference]: With dead ends: 80 [2023-11-29 00:06:47,412 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 00:06:47,413 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 00:06:47,415 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 00:06:47,415 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 00:06:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 00:06:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 00:06:47,420 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 00:06:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-29 00:06:47,421 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 27 [2023-11-29 00:06:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:06:47,422 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-29 00:06:47,422 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 00:06:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-11-29 00:06:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 00:06:47,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:47,423 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 00:06:47,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:06:47,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:47,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash -269462312, now seen corresponding path program 1 times [2023-11-29 00:06:47,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:47,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943133002] [2023-11-29 00:06:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:47,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:48,589 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 00:06:48,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:48,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943133002] [2023-11-29 00:06:48,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943133002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:06:48,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:06:48,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:06:48,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758543150] [2023-11-29 00:06:48,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:06:48,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:06:48,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:06:48,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:06:48,593 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 00:06:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:06:48,946 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-11-29 00:06:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:06:48,947 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 00:06:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:06:48,948 INFO L225 Difference]: With dead ends: 75 [2023-11-29 00:06:48,948 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 00:06:48,949 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 00:06:48,950 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 00:06:48,950 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 00:06:48,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 00:06:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-29 00:06:48,956 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 00:06:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-29 00:06:48,958 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 27 [2023-11-29 00:06:48,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:06:48,958 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-29 00:06:48,958 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 00:06:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-29 00:06:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 00:06:48,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:48,960 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 00:06:48,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:06:48,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1144208086, now seen corresponding path program 1 times [2023-11-29 00:06:48,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:48,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533333122] [2023-11-29 00:06:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:50,041 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 00:06:50,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:50,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533333122] [2023-11-29 00:06:50,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533333122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:50,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377128283] [2023-11-29 00:06:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:50,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:50,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:50,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:50,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:06:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:51,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 5408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:06:51,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:51,440 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 00:06:51,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:51,456 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 00:06:51,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377128283] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:51,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:06:51,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 00:06:51,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834873778] [2023-11-29 00:06:51,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:06:51,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:06:51,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:51,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:06:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:06:51,459 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 00:06:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:06:51,846 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-29 00:06:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:06:51,847 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 00:06:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:06:51,848 INFO L225 Difference]: With dead ends: 66 [2023-11-29 00:06:51,848 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 00:06:51,848 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 00:06:51,849 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:06:51,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:06:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 00:06:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-29 00:06:51,855 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 00:06:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-29 00:06:51,856 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 28 [2023-11-29 00:06:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:06:51,856 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-29 00:06:51,856 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 00:06:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-29 00:06:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 00:06:51,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:51,858 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 00:06:51,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:06:52,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:52,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:52,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:52,059 INFO L85 PathProgramCache]: Analyzing trace with hash -372313272, now seen corresponding path program 1 times [2023-11-29 00:06:52,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:52,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844999643] [2023-11-29 00:06:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:52,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:52,931 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 00:06:52,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:52,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844999643] [2023-11-29 00:06:52,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844999643] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:52,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304445238] [2023-11-29 00:06:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:52,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:52,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:52,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:52,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:06:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:54,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:06:54,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:54,351 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 00:06:54,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:54,363 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 00:06:54,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304445238] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:54,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:06:54,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 00:06:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483156769] [2023-11-29 00:06:54,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:06:54,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:06:54,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:54,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:06:54,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:06:54,365 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 00:06:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:06:54,654 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-29 00:06:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:06:54,655 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 00:06:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:06:54,656 INFO L225 Difference]: With dead ends: 57 [2023-11-29 00:06:54,656 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 00:06:54,656 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 00:06:54,657 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 00:06:54,658 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 00:06:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 00:06:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-29 00:06:54,662 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 00:06:54,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-29 00:06:54,663 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2023-11-29 00:06:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:06:54,664 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-29 00:06:54,664 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 00:06:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-29 00:06:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 00:06:54,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:54,665 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 00:06:54,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:06:54,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:54,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:54,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2044304526, now seen corresponding path program 1 times [2023-11-29 00:06:54,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:54,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658483296] [2023-11-29 00:06:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:55,834 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 00:06:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658483296] [2023-11-29 00:06:55,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658483296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175994593] [2023-11-29 00:06:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:55,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:55,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:55,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:55,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:06:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:56,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:06:56,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:56,967 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 00:06:56,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:56,980 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 00:06:56,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175994593] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:56,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:06:56,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 00:06:56,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253417361] [2023-11-29 00:06:56,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:06:56,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:06:56,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:56,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:06:56,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:06:56,983 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 00:06:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:06:57,250 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-11-29 00:06:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:06:57,250 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 00:06:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:06:57,251 INFO L225 Difference]: With dead ends: 74 [2023-11-29 00:06:57,251 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 00:06:57,252 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 00:06:57,253 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, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:06:57,253 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 00:06:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 00:06:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-29 00:06:57,257 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 00:06:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-29 00:06:57,258 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 34 [2023-11-29 00:06:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:06:57,258 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-29 00:06:57,258 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 00:06:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-29 00:06:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 00:06:57,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:57,259 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 00:06:57,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:06:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:57,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:57,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -359810836, now seen corresponding path program 1 times [2023-11-29 00:06:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:57,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881717113] [2023-11-29 00:06:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:57,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:06:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:58,252 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 00:06:58,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:06:58,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881717113] [2023-11-29 00:06:58,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881717113] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:58,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354889199] [2023-11-29 00:06:58,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:58,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:58,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:06:58,254 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:06:58,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:06:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:06:59,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 5450 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:06:59,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:06:59,387 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 00:06:59,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:06:59,402 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 00:06:59,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354889199] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:06:59,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:06:59,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 00:06:59,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271630019] [2023-11-29 00:06:59,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:06:59,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:06:59,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:06:59,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:06:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:06:59,405 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 00:06:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:06:59,764 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-11-29 00:06:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:06:59,765 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 00:06:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:06:59,765 INFO L225 Difference]: With dead ends: 64 [2023-11-29 00:06:59,765 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 00:06:59,766 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 00:06:59,767 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:06:59,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 76 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:06:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 00:06:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 00:06:59,772 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 00:06:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-29 00:06:59,773 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 37 [2023-11-29 00:06:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:06:59,773 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-29 00:06:59,773 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 00:06:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-29 00:06:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 00:06:59,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:06:59,774 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 00:06:59,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:06:59,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:06:59,974 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:06:59,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:06:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash 242160194, now seen corresponding path program 1 times [2023-11-29 00:06:59,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:06:59,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48827032] [2023-11-29 00:06:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:06:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:00,717 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 00:07:00,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48827032] [2023-11-29 00:07:00,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48827032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161229856] [2023-11-29 00:07:00,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:00,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:00,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:00,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:07:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:01,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 5456 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:07:01,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:02,021 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 00:07:02,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:02,034 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 00:07:02,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161229856] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:02,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:02,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 00:07:02,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787224204] [2023-11-29 00:07:02,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:02,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:07:02,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:02,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:07:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:07:02,035 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 00:07:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:02,328 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-29 00:07:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:07:02,329 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 00:07:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:02,330 INFO L225 Difference]: With dead ends: 54 [2023-11-29 00:07:02,330 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 00:07:02,330 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 00:07:02,331 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 00:07:02,331 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 00:07:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 00:07:02,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-29 00:07:02,334 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 00:07:02,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-29 00:07:02,335 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2023-11-29 00:07:02,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:02,335 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-29 00:07:02,336 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 00:07:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-29 00:07:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 00:07:02,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:02,336 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 00:07:02,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:07:02,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:07:02,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:02,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1371144433, now seen corresponding path program 1 times [2023-11-29 00:07:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:02,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401294581] [2023-11-29 00:07:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:03,193 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 00:07:03,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:03,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401294581] [2023-11-29 00:07:03,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401294581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:03,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982976303] [2023-11-29 00:07:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:03,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:03,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:03,195 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:03,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:07:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:04,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 5462 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:07:04,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:04,321 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 00:07:04,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:04,354 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 00:07:04,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982976303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:04,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:04,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 00:07:04,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799695649] [2023-11-29 00:07:04,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:04,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:07:04,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:07:04,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:07:04,356 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 00:07:04,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:04,851 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2023-11-29 00:07:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:07:04,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) Word has length 43 [2023-11-29 00:07:04,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:04,853 INFO L225 Difference]: With dead ends: 95 [2023-11-29 00:07:04,853 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 00:07:04,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 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 00:07:04,854 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:04,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 230 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:07:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 00:07:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-29 00:07:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 59 states have internal predecessors, (79), 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 00:07:04,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-11-29 00:07:04,859 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 43 [2023-11-29 00:07:04,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:04,859 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-11-29 00:07:04,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 00:07:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-11-29 00:07:04,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 00:07:04,860 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:04,860 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] [2023-11-29 00:07:04,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 00:07:05,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:05,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:05,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:05,061 INFO L85 PathProgramCache]: Analyzing trace with hash 528894503, now seen corresponding path program 2 times [2023-11-29 00:07:05,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:05,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775162355] [2023-11-29 00:07:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:05,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 00:07:05,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:05,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775162355] [2023-11-29 00:07:05,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775162355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:05,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050037479] [2023-11-29 00:07:05,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:07:05,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:05,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:05,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:07:07,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:07:07,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:07,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 5527 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:07:07,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 00:07:07,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-29 00:07:07,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050037479] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:07,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:07,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-11-29 00:07:07,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259128395] [2023-11-29 00:07:07,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:07,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:07:07,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:07:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:07:07,165 INFO L87 Difference]: Start difference. First operand 60 states and 79 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 00:07:07,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:07,462 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2023-11-29 00:07:07,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:07:07,463 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 53 [2023-11-29 00:07:07,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:07,464 INFO L225 Difference]: With dead ends: 70 [2023-11-29 00:07:07,464 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 00:07:07,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:07:07,465 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 00:07:07,465 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 00:07:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 00:07:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 00:07:07,470 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 00:07:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-29 00:07:07,471 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 53 [2023-11-29 00:07:07,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:07,471 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-29 00:07:07,471 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 00:07:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-29 00:07:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 00:07:07,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:07,473 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 00:07:07,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:07:07,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:07:07,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:07,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:07,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1861807109, now seen corresponding path program 1 times [2023-11-29 00:07:07,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:07,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091998245] [2023-11-29 00:07:07,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:07,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:08,451 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 00:07:08,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:08,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091998245] [2023-11-29 00:07:08,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091998245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:08,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129251137] [2023-11-29 00:07:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:08,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:08,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:08,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:08,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:07:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:09,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 5541 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:07:09,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:09,638 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 00:07:09,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:09,666 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 00:07:09,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129251137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:09,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:09,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-29 00:07:09,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680693554] [2023-11-29 00:07:09,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:09,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:07:09,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:07:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:07:09,668 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 00:07:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:10,234 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2023-11-29 00:07:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:07:10,235 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 00:07:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:10,235 INFO L225 Difference]: With dead ends: 116 [2023-11-29 00:07:10,235 INFO L226 Difference]: Without dead ends: 71 [2023-11-29 00:07:10,236 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 00:07:10,237 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:10,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 267 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:07:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-29 00:07:10,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-29 00:07:10,244 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 00:07:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2023-11-29 00:07:10,244 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 56 [2023-11-29 00:07:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:10,245 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2023-11-29 00:07:10,245 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 00:07:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2023-11-29 00:07:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-29 00:07:10,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:10,246 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 00:07:10,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:07:10,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:07:10,447 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:10,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash -78359747, now seen corresponding path program 2 times [2023-11-29 00:07:10,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:10,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194140325] [2023-11-29 00:07:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:10,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:10,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:11,477 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 00:07:11,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:11,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194140325] [2023-11-29 00:07:11,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194140325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:11,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212705994] [2023-11-29 00:07:11,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:07:11,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:11,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:11,479 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:11,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:07:12,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:07:12,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:12,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 5606 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 00:07:12,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:12,810 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 00:07:12,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-29 00:07:12,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212705994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:12,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:12,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2023-11-29 00:07:12,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23027976] [2023-11-29 00:07:12,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:12,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:07:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:07:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:07:12,946 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 00:07:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:13,626 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2023-11-29 00:07:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:07:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) Word has length 66 [2023-11-29 00:07:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:13,627 INFO L225 Difference]: With dead ends: 126 [2023-11-29 00:07:13,627 INFO L226 Difference]: Without dead ends: 72 [2023-11-29 00:07:13,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:07:13,628 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:13,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 388 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:07:13,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-29 00:07:13,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-29 00:07:13,632 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 00:07:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2023-11-29 00:07:13,633 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 66 [2023-11-29 00:07:13,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:13,633 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2023-11-29 00:07:13,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 00:07:13,633 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2023-11-29 00:07:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 00:07:13,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:13,634 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-29 00:07:13,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:07:13,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:13,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:13,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:13,835 INFO L85 PathProgramCache]: Analyzing trace with hash -789509461, now seen corresponding path program 3 times [2023-11-29 00:07:13,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:13,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666588688] [2023-11-29 00:07:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:13,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 00:07:14,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:14,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666588688] [2023-11-29 00:07:14,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666588688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:14,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842346853] [2023-11-29 00:07:14,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:07:14,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:14,762 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:14,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:07:16,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 00:07:16,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:16,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 5473 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:07:16,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-29 00:07:16,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 00:07:16,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842346853] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:16,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:16,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 12 [2023-11-29 00:07:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292046008] [2023-11-29 00:07:16,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:07:16,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:07:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:07:16,208 INFO L87 Difference]: Start difference. First operand 72 states and 94 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 00:07:16,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:16,467 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2023-11-29 00:07:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:07:16,467 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 67 [2023-11-29 00:07:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:16,468 INFO L225 Difference]: With dead ends: 104 [2023-11-29 00:07:16,468 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 00:07:16,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:07:16,469 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 00:07:16,469 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 00:07:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 00:07:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-29 00:07:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 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 00:07:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2023-11-29 00:07:16,476 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 67 [2023-11-29 00:07:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:16,476 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2023-11-29 00:07:16,477 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 00:07:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2023-11-29 00:07:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 00:07:16,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:16,478 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-11-29 00:07:16,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:07:16,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:16,678 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:16,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1264911644, now seen corresponding path program 1 times [2023-11-29 00:07:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:16,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665546002] [2023-11-29 00:07:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:16,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-29 00:07:17,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:17,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665546002] [2023-11-29 00:07:17,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665546002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:17,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707436579] [2023-11-29 00:07:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:17,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:17,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:17,577 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:17,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:07:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:18,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 5631 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:07:18,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 00:07:18,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:07:18,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707436579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:07:18,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:07:18,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-29 00:07:18,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421311777] [2023-11-29 00:07:18,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:18,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:07:18,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:07:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:07:18,834 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 00:07:19,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:19,125 INFO L93 Difference]: Finished difference Result 129 states and 171 transitions. [2023-11-29 00:07:19,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:07:19,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 70 [2023-11-29 00:07:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:19,127 INFO L225 Difference]: With dead ends: 129 [2023-11-29 00:07:19,127 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 00:07:19,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:07:19,128 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:19,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:07:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 00:07:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-11-29 00:07:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 73 states have internal predecessors, (96), 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 00:07:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2023-11-29 00:07:19,135 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 70 [2023-11-29 00:07:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:19,135 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2023-11-29 00:07:19,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 00:07:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2023-11-29 00:07:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-29 00:07:19,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:19,137 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2023-11-29 00:07:19,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 00:07:19,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:07:19,348 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:19,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:19,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1148367932, now seen corresponding path program 1 times [2023-11-29 00:07:19,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:19,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25286425] [2023-11-29 00:07:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-29 00:07:20,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:20,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25286425] [2023-11-29 00:07:20,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25286425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:20,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352076086] [2023-11-29 00:07:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:20,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:20,242 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:20,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:07:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:21,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 5645 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:07:21,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 00:07:21,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 00:07:21,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352076086] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:21,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:21,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 9] total 16 [2023-11-29 00:07:21,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368724799] [2023-11-29 00:07:21,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:21,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:07:21,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:21,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:07:21,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:07:21,590 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 00:07:21,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:21,903 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2023-11-29 00:07:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:07:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 73 [2023-11-29 00:07:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:21,904 INFO L225 Difference]: With dead ends: 129 [2023-11-29 00:07:21,904 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 00:07:21,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:07:21,905 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 00:07:21,905 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 00:07:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 00:07:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-29 00:07:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 74 states have internal predecessors, (97), 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 00:07:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2023-11-29 00:07:21,911 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 73 [2023-11-29 00:07:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:21,912 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2023-11-29 00:07:21,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 00:07:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2023-11-29 00:07:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-29 00:07:21,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:21,912 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2023-11-29 00:07:21,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:07:22,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:22,113 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:22,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:22,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1864594645, now seen corresponding path program 1 times [2023-11-29 00:07:22,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:22,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56368210] [2023-11-29 00:07:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:22,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 00:07:23,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:23,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56368210] [2023-11-29 00:07:23,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56368210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:23,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409944065] [2023-11-29 00:07:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:23,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:23,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:23,125 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:23,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:07:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:24,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 5650 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:07:24,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-29 00:07:24,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-29 00:07:24,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409944065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:24,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:24,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 8] total 16 [2023-11-29 00:07:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140116319] [2023-11-29 00:07:24,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:24,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:07:24,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:07:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:07:24,553 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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 00:07:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:25,636 INFO L93 Difference]: Finished difference Result 149 states and 202 transitions. [2023-11-29 00:07:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:07:25,637 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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 00:07:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:25,638 INFO L225 Difference]: With dead ends: 149 [2023-11-29 00:07:25,638 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 00:07:25,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2023-11-29 00:07:25,639 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 63 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:25,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 353 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:07:25,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 00:07:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-29 00:07:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3118279569892473) internal successors, (122), 93 states have internal predecessors, (122), 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 00:07:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2023-11-29 00:07:25,645 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 74 [2023-11-29 00:07:25,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:25,645 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2023-11-29 00:07:25,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 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 00:07:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2023-11-29 00:07:25,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 00:07:25,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:25,646 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 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, 1, 1, 1] [2023-11-29 00:07:25,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:07:25,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:25,847 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:25,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1696741860, now seen corresponding path program 2 times [2023-11-29 00:07:25,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:25,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995484229] [2023-11-29 00:07:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:25,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-29 00:07:27,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:27,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995484229] [2023-11-29 00:07:27,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995484229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:27,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222213527] [2023-11-29 00:07:27,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:07:27,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:27,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:27,235 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:27,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:07:28,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:07:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:28,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 5763 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:07:28,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 00:07:28,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-29 00:07:28,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222213527] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:28,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:28,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 26 [2023-11-29 00:07:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631018825] [2023-11-29 00:07:28,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:28,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:07:28,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:07:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:07:28,895 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 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 00:07:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:30,054 INFO L93 Difference]: Finished difference Result 178 states and 236 transitions. [2023-11-29 00:07:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:07:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 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 93 [2023-11-29 00:07:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:30,055 INFO L225 Difference]: With dead ends: 178 [2023-11-29 00:07:30,055 INFO L226 Difference]: Without dead ends: 101 [2023-11-29 00:07:30,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-11-29 00:07:30,056 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 38 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:30,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 689 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:07:30,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-29 00:07:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-11-29 00:07:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 98 states have internal predecessors, (127), 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 00:07:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2023-11-29 00:07:30,064 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 93 [2023-11-29 00:07:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:30,065 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2023-11-29 00:07:30,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 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 00:07:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2023-11-29 00:07:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-29 00:07:30,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:30,066 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 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, 1, 1] [2023-11-29 00:07:30,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:07:30,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:07:30,267 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:30,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:30,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1183577982, now seen corresponding path program 3 times [2023-11-29 00:07:30,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:30,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802298975] [2023-11-29 00:07:30,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:30,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-29 00:07:31,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802298975] [2023-11-29 00:07:31,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802298975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831890630] [2023-11-29 00:07:31,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:07:31,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:31,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:31,741 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:31,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:07:33,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:07:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:33,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 00:07:33,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-29 00:07:33,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:07:33,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831890630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:07:33,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:07:33,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2023-11-29 00:07:33,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003545203] [2023-11-29 00:07:33,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:33,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:07:33,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:07:33,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:07:33,811 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 00:07:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:34,186 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2023-11-29 00:07:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:07:34,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 98 [2023-11-29 00:07:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:34,187 INFO L225 Difference]: With dead ends: 135 [2023-11-29 00:07:34,187 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 00:07:34,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:07:34,188 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 13 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:34,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 149 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:07:34,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 00:07:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2023-11-29 00:07:34,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.292929292929293) internal successors, (128), 99 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 00:07:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2023-11-29 00:07:34,197 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 98 [2023-11-29 00:07:34,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:34,197 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2023-11-29 00:07:34,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 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 00:07:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2023-11-29 00:07:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 00:07:34,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:34,199 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 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, 1, 1, 1] [2023-11-29 00:07:34,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:07:34,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:07:34,399 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:34,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash -132685079, now seen corresponding path program 1 times [2023-11-29 00:07:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:34,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619649586] [2023-11-29 00:07:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-29 00:07:36,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:36,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619649586] [2023-11-29 00:07:36,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619649586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:36,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051823628] [2023-11-29 00:07:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:36,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:36,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:36,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:36,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:07:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:37,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 5796 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 00:07:37,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 00:07:37,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2023-11-29 00:07:37,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051823628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:37,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:37,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 7] total 24 [2023-11-29 00:07:37,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179099054] [2023-11-29 00:07:37,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:37,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:07:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:37,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:07:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:07:37,470 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 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 00:07:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:38,700 INFO L93 Difference]: Finished difference Result 158 states and 211 transitions. [2023-11-29 00:07:38,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:07:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 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 99 [2023-11-29 00:07:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:38,701 INFO L225 Difference]: With dead ends: 158 [2023-11-29 00:07:38,701 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 00:07:38,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:07:38,703 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 73 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:38,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 567 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:07:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 00:07:38,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-11-29 00:07:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3) internal successors, (156), 120 states have internal predecessors, (156), 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 00:07:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 156 transitions. [2023-11-29 00:07:38,712 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 156 transitions. Word has length 99 [2023-11-29 00:07:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:38,712 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 156 transitions. [2023-11-29 00:07:38,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 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 00:07:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 156 transitions. [2023-11-29 00:07:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-29 00:07:38,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:38,714 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 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, 1, 1, 1] [2023-11-29 00:07:38,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:07:38,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:38,915 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:38,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1400755345, now seen corresponding path program 2 times [2023-11-29 00:07:38,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:38,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181060250] [2023-11-29 00:07:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:38,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 00:07:40,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:40,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181060250] [2023-11-29 00:07:40,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181060250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:40,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200113579] [2023-11-29 00:07:40,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:07:40,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:40,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:40,461 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:40,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:07:41,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:07:41,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:41,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 5922 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:07:41,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 00:07:42,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2023-11-29 00:07:42,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200113579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:42,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:42,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 13] total 37 [2023-11-29 00:07:42,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240081742] [2023-11-29 00:07:42,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:42,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 00:07:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 00:07:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 00:07:42,554 INFO L87 Difference]: Start difference. First operand 121 states and 156 transitions. Second operand has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 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 00:07:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:49,114 INFO L93 Difference]: Finished difference Result 215 states and 293 transitions. [2023-11-29 00:07:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 00:07:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 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 120 [2023-11-29 00:07:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:49,116 INFO L225 Difference]: With dead ends: 215 [2023-11-29 00:07:49,116 INFO L226 Difference]: Without dead ends: 162 [2023-11-29 00:07:49,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 00:07:49,118 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 170 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:49,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1403 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:07:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-29 00:07:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2023-11-29 00:07:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3081761006289307) internal successors, (208), 159 states have internal predecessors, (208), 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 00:07:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 208 transitions. [2023-11-29 00:07:49,129 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 208 transitions. Word has length 120 [2023-11-29 00:07:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:49,129 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 208 transitions. [2023-11-29 00:07:49,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.486486486486487) internal successors, (166), 37 states have internal predecessors, (166), 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 00:07:49,130 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 208 transitions. [2023-11-29 00:07:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-29 00:07:49,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:49,131 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 13, 13, 13, 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, 1, 1, 1] [2023-11-29 00:07:49,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:07:49,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:49,332 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:49,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash -508552599, now seen corresponding path program 3 times [2023-11-29 00:07:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:49,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114108228] [2023-11-29 00:07:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:49,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2023-11-29 00:07:51,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:51,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114108228] [2023-11-29 00:07:51,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114108228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:51,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678299689] [2023-11-29 00:07:51,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:07:51,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:51,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:51,170 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:51,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:07:53,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:07:53,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:53,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 00:07:53,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 981 trivial. 0 not checked. [2023-11-29 00:07:53,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 987 trivial. 0 not checked. [2023-11-29 00:07:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678299689] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:53,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:53,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 6] total 22 [2023-11-29 00:07:53,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598297433] [2023-11-29 00:07:53,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:07:53,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:07:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:07:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:07:53,506 INFO L87 Difference]: Start difference. First operand 160 states and 208 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 00:07:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:53,836 INFO L93 Difference]: Finished difference Result 171 states and 222 transitions. [2023-11-29 00:07:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:07:53,837 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 159 [2023-11-29 00:07:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:53,838 INFO L225 Difference]: With dead ends: 171 [2023-11-29 00:07:53,838 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 00:07:53,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2023-11-29 00:07:53,840 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 00:07:53,840 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 00:07:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 00:07:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-11-29 00:07:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.30625) internal successors, (209), 160 states have internal predecessors, (209), 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 00:07:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2023-11-29 00:07:53,848 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 159 [2023-11-29 00:07:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:53,848 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2023-11-29 00:07:53,848 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 00:07:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2023-11-29 00:07:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-29 00:07:53,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:53,849 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 13, 13, 13, 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, 1, 1, 1, 1] [2023-11-29 00:07:53,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:07:54,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:54,050 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:07:54,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1229781546, now seen corresponding path program 1 times [2023-11-29 00:07:54,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:07:54,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725864175] [2023-11-29 00:07:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:54,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:07:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-29 00:07:55,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:07:55,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725864175] [2023-11-29 00:07:55,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725864175] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:07:55,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862554330] [2023-11-29 00:07:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:07:55,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:07:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:07:55,845 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:07:55,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:07:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:57,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 6161 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 00:07:57,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-29 00:07:57,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 360 proven. 494 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-29 00:07:58,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862554330] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:58,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:07:58,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 30] total 45 [2023-11-29 00:07:58,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412419138] [2023-11-29 00:07:58,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:58,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:07:58,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:07:58,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:07:58,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:07:58,659 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 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 00:08:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:08:15,959 INFO L93 Difference]: Finished difference Result 296 states and 402 transitions. [2023-11-29 00:08:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 00:08:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 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 160 [2023-11-29 00:08:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:08:15,962 INFO L225 Difference]: With dead ends: 296 [2023-11-29 00:08:15,962 INFO L226 Difference]: Without dead ends: 206 [2023-11-29 00:08:15,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=714, Invalid=2592, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 00:08:15,964 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 189 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:08:15,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1526 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 00:08:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-29 00:08:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-29 00:08:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3121951219512196) internal successors, (269), 205 states have internal predecessors, (269), 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 00:08:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 269 transitions. [2023-11-29 00:08:15,973 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 269 transitions. Word has length 160 [2023-11-29 00:08:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:08:15,974 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 269 transitions. [2023-11-29 00:08:15,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 45 states have internal predecessors, (175), 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 00:08:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 269 transitions. [2023-11-29 00:08:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-29 00:08:15,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:08:15,975 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 22, 22, 22, 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, 1, 1, 1, 1] [2023-11-29 00:08:15,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:08:16,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:16,176 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:08:16,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash -82907376, now seen corresponding path program 2 times [2023-11-29 00:08:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:08:16,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113661964] [2023-11-29 00:08:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:08:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:08:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:08:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2023-11-29 00:08:19,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:08:19,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113661964] [2023-11-29 00:08:19,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113661964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:08:19,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97051512] [2023-11-29 00:08:19,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:08:19,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:08:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:08:19,543 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:08:19,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:08:21,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:08:21,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:21,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 6431 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 00:08:21,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 1832 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-29 00:08:21,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1905 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2023-11-29 00:08:23,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97051512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:23,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:08:23,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 48, 25] total 77 [2023-11-29 00:08:23,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888122302] [2023-11-29 00:08:23,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:23,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 00:08:23,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:08:23,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 00:08:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=5144, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 00:08:23,671 INFO L87 Difference]: Start difference. First operand 206 states and 269 transitions. Second operand has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 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 00:11:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:11:30,569 INFO L93 Difference]: Finished difference Result 373 states and 515 transitions. [2023-11-29 00:11:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 00:11:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 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 205 [2023-11-29 00:11:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:11:30,571 INFO L225 Difference]: With dead ends: 373 [2023-11-29 00:11:30,571 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 00:11:30,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 183.7s TimeCoverageRelationStatistics Valid=1764, Invalid=7938, Unknown=0, NotChecked=0, Total=9702 [2023-11-29 00:11:30,574 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 630 mSDsluCounter, 3685 mSDsCounter, 0 mSdLazyCounter, 7877 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 3771 SdHoareTripleChecker+Invalid, 7879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:11:30,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 3771 Invalid, 7879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7877 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-29 00:11:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 00:11:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2023-11-29 00:11:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.3178571428571428) internal successors, (369), 280 states have internal predecessors, (369), 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 00:11:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 369 transitions. [2023-11-29 00:11:30,586 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 369 transitions. Word has length 205 [2023-11-29 00:11:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:11:30,586 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 369 transitions. [2023-11-29 00:11:30,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.727272727272727) internal successors, (287), 77 states have internal predecessors, (287), 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 00:11:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 369 transitions. [2023-11-29 00:11:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-11-29 00:11:30,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:11:30,588 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 29, 29, 29, 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, 1, 1, 1, 1] [2023-11-29 00:11:30,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:11:30,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:11:30,788 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:11:30,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1800432854, now seen corresponding path program 3 times [2023-11-29 00:11:30,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:30,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369695755] [2023-11-29 00:11:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:30,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 3179 trivial. 0 not checked. [2023-11-29 00:11:34,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369695755] [2023-11-29 00:11:34,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369695755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340386987] [2023-11-29 00:11:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:11:34,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:34,884 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:34,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:11:37,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 00:11:37,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:37,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 5573 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:11:37,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2023-11-29 00:11:37,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4426 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4424 trivial. 0 not checked. [2023-11-29 00:11:37,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340386987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:37,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:37,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 8, 6] total 42 [2023-11-29 00:11:37,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002225783] [2023-11-29 00:11:37,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:37,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 00:11:37,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:37,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 00:11:37,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 00:11:37,680 INFO L87 Difference]: Start difference. First operand 281 states and 369 transitions. Second operand has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 42 states have internal predecessors, (176), 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 00:11:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:11:40,664 INFO L93 Difference]: Finished difference Result 460 states and 609 transitions. [2023-11-29 00:11:40,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 00:11:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 42 states have internal predecessors, (176), 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 280 [2023-11-29 00:11:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:11:40,667 INFO L225 Difference]: With dead ends: 460 [2023-11-29 00:11:40,667 INFO L226 Difference]: Without dead ends: 298 [2023-11-29 00:11:40,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=1837, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:11:40,668 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 88 mSDsluCounter, 1980 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 3857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:11:40,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 2046 Invalid, 3857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 00:11:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-29 00:11:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2023-11-29 00:11:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.3186440677966103) internal successors, (389), 295 states have internal predecessors, (389), 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 00:11:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 389 transitions. [2023-11-29 00:11:40,683 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 389 transitions. Word has length 280 [2023-11-29 00:11:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:11:40,683 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 389 transitions. [2023-11-29 00:11:40,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.190476190476191) internal successors, (176), 42 states have internal predecessors, (176), 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 00:11:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 389 transitions. [2023-11-29 00:11:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-29 00:11:40,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:11:40,685 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 30, 30, 30, 4, 4, 2, 2, 2, 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, 1] [2023-11-29 00:11:40,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:11:40,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:11:40,885 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:11:40,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1267327331, now seen corresponding path program 4 times [2023-11-29 00:11:40,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:11:40,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091400810] [2023-11-29 00:11:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:11:40,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:11:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:11:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2023-11-29 00:11:45,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:11:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091400810] [2023-11-29 00:11:45,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091400810] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:11:45,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451275017] [2023-11-29 00:11:45,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:11:45,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:11:45,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:11:45,088 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:11:45,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c6b9d0b-a514-4547-9531-66ac10652094/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:11:46,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:11:46,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:46,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 6918 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-29 00:11:46,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2023-11-29 00:11:46,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 1456 proven. 2670 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-29 00:11:51,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451275017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:51,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:11:51,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 64] total 96 [2023-11-29 00:11:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986907245] [2023-11-29 00:11:51,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:51,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-29 00:11:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:11:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-29 00:11:51,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1212, Invalid=7908, Unknown=0, NotChecked=0, Total=9120 [2023-11-29 00:11:51,687 INFO L87 Difference]: Start difference. First operand 296 states and 389 transitions. Second operand has 96 states, 96 states have (on average 3.4166666666666665) internal successors, (328), 96 states have internal predecessors, (328), 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)