./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/cartpole_83_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/cartpole_83_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ --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 628482cc58ddd8d042cf2e0f7d07629d64609ce4743bf030a481197575a79e82 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:34:01,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:34:02,097 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:34:02,102 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:34:02,102 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:34:02,151 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:34:02,153 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:34:02,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:34:02,155 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:34:02,160 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:34:02,161 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:34:02,162 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:34:02,163 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:34:02,164 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:34:02,165 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:34:02,165 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:34:02,166 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:34:02,166 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:34:02,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:34:02,167 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:34:02,168 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:34:02,168 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:34:02,169 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:34:02,169 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:34:02,169 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:34:02,170 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:34:02,170 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:34:02,171 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:34:02,172 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:34:02,172 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:34:02,173 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:34:02,174 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:02,174 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:34:02,174 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:34:02,174 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:34:02,175 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:34:02,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:34:02,175 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:34:02,175 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:34:02,176 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:34:02,176 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:34:02,176 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:34:02,177 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_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 628482cc58ddd8d042cf2e0f7d07629d64609ce4743bf030a481197575a79e82 [2023-11-23 22:34:02,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:34:02,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:34:02,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:34:02,496 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:34:02,496 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:34:02,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/neural-networks/cartpole_83_safe.c-amalgamation.i [2023-11-23 22:34:05,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:34:06,215 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:34:06,217 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/sv-benchmarks/c/neural-networks/cartpole_83_safe.c-amalgamation.i [2023-11-23 22:34:06,261 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/data/e892ffdb0/8c512a07f9234fcd95740bea76e0e1bb/FLAG4ed2b87dc [2023-11-23 22:34:06,285 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/data/e892ffdb0/8c512a07f9234fcd95740bea76e0e1bb [2023-11-23 22:34:06,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:34:06,293 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:34:06,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:06,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:34:06,305 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:34:06,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:06" (1/1) ... [2023-11-23 22:34:06,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a13b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:06, skipping insertion in model container [2023-11-23 22:34:06,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:34:06" (1/1) ... [2023-11-23 22:34:06,426 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:34:06,792 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 22:34:07,605 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_1a6362bd-6929-4528-b8e3-d4c03c5cab80/sv-benchmarks/c/neural-networks/cartpole_83_safe.c-amalgamation.i[63704,63717] [2023-11-23 22:34:07,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:08,133 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:34:08,168 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-23 22:34:08,207 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_1a6362bd-6929-4528-b8e3-d4c03c5cab80/sv-benchmarks/c/neural-networks/cartpole_83_safe.c-amalgamation.i[63704,63717] [2023-11-23 22:34:08,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:34:08,763 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:34:08,771 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:34:08,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08 WrapperNode [2023-11-23 22:34:08,772 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:34:08,773 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:08,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:34:08,774 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:34:08,781 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:08,887 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,227 INFO L138 Inliner]: procedures = 621, calls = 4747, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5015 [2023-11-23 22:34:09,228 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:34:09,229 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:34:09,229 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:34:09,229 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:34:09,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,331 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,419 INFO L189 HeapSplitter]: Split 4721 memory accesses to 12 slices as follows [2, 7, 3, 257, 65, 4097, 65, 129, 13, 3, 10, 70] [2023-11-23 22:34:09,420 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,420 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,552 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,578 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,617 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,713 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:34:09,745 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:34:09,745 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:34:09,746 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:34:09,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (1/1) ... [2023-11-23 22:34:09,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:09,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:09,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:34:09,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:34:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-23 22:34:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-23 22:34:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-23 22:34:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-23 22:34:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-23 22:34:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-23 22:34:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-23 22:34:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-23 22:34:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-23 22:34:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-23 22:34:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-23 22:34:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-23 22:34:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:34:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-23 22:34:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-23 22:34:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-23 22:34:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-23 22:34:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-23 22:34:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-23 22:34:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-23 22:34:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-23 22:34:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-23 22:34:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-23 22:34:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-23 22:34:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-23 22:34:09,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-23 22:34:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-23 22:34:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-23 22:34:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-23 22:34:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-23 22:34:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-23 22:34:09,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-23 22:34:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-23 22:34:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-23 22:34:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-23 22:34:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-23 22:34:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-23 22:34:09,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:34:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:34:09,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:34:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:34:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:34:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:34:09,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:34:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 22:34:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 22:34:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 22:34:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-23 22:34:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-23 22:34:09,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-23 22:34:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-23 22:34:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-23 22:34:09,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-23 22:34:10,080 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:34:10,082 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:34:18,400 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:34:18,783 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:34:18,784 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-23 22:34:18,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:18 BoogieIcfgContainer [2023-11-23 22:34:18,785 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:34:18,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:34:18,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:34:18,792 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:34:18,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:34:06" (1/3) ... [2023-11-23 22:34:18,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2f29fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:18, skipping insertion in model container [2023-11-23 22:34:18,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:34:08" (2/3) ... [2023-11-23 22:34:18,795 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2f29fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:34:18, skipping insertion in model container [2023-11-23 22:34:18,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:34:18" (3/3) ... [2023-11-23 22:34:18,796 INFO L112 eAbstractionObserver]: Analyzing ICFG cartpole_83_safe.c-amalgamation.i [2023-11-23 22:34:18,816 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:34:18,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:34:18,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:34:18,890 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;@7f6454a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:34:18,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 22:34:18,895 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) [2023-11-23 22:34:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 22:34:18,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:18,906 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] [2023-11-23 22:34:18,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:18,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -531373804, now seen corresponding path program 1 times [2023-11-23 22:34:18,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:18,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287372084] [2023-11-23 22:34:18,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:18,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:20,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:20,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287372084] [2023-11-23 22:34:20,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287372084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:20,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:20,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:34:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397548001] [2023-11-23 22:34:20,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:20,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 22:34:20,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 22:34:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 22:34:20,172 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) [2023-11-23 22:34:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:20,574 INFO L93 Difference]: Finished difference Result 89 states and 155 transitions. [2023-11-23 22:34:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 22:34:20,577 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 [2023-11-23 22:34:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:20,586 INFO L225 Difference]: With dead ends: 89 [2023-11-23 22:34:20,586 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 22:34:20,589 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 [2023-11-23 22:34:20,593 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:20,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:34:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 22:34:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-23 22:34:20,628 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) [2023-11-23 22:34:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2023-11-23 22:34:20,630 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 27 [2023-11-23 22:34:20,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:20,631 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2023-11-23 22:34:20,631 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) [2023-11-23 22:34:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2023-11-23 22:34:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 22:34:20,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:20,633 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] [2023-11-23 22:34:20,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:34:20,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:20,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:20,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1087110762, now seen corresponding path program 1 times [2023-11-23 22:34:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:20,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236550982] [2023-11-23 22:34:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:20,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:21,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:21,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236550982] [2023-11-23 22:34:21,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236550982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:21,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:21,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:21,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451803940] [2023-11-23 22:34:21,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:21,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:21,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:21,669 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) [2023-11-23 22:34:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:22,074 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-11-23 22:34:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:22,078 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 [2023-11-23 22:34:22,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:22,081 INFO L225 Difference]: With dead ends: 80 [2023-11-23 22:34:22,081 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 22:34:22,082 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 [2023-11-23 22:34:22,085 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-11-23 22:34:22,085 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] [2023-11-23 22:34:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 22:34:22,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-23 22:34:22,098 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) [2023-11-23 22:34:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2023-11-23 22:34:22,102 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 27 [2023-11-23 22:34:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:22,103 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2023-11-23 22:34:22,103 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) [2023-11-23 22:34:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2023-11-23 22:34:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 22:34:22,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:22,105 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] [2023-11-23 22:34:22,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:34:22,106 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:22,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash -269462312, now seen corresponding path program 1 times [2023-11-23 22:34:22,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:22,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48139452] [2023-11-23 22:34:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:22,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:23,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:23,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48139452] [2023-11-23 22:34:23,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48139452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:34:23,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:34:23,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:34:23,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031674285] [2023-11-23 22:34:23,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:23,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:23,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:23,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:34:23,578 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) [2023-11-23 22:34:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:23,982 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-11-23 22:34:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:23,983 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 [2023-11-23 22:34:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:23,984 INFO L225 Difference]: With dead ends: 75 [2023-11-23 22:34:23,984 INFO L226 Difference]: Without dead ends: 45 [2023-11-23 22:34:23,985 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 [2023-11-23 22:34:23,986 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:23,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:34:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-23 22:34:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-23 22:34:23,995 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) [2023-11-23 22:34:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2023-11-23 22:34:24,001 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 27 [2023-11-23 22:34:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:24,002 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2023-11-23 22:34:24,002 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) [2023-11-23 22:34:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2023-11-23 22:34:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 22:34:24,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:24,006 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] [2023-11-23 22:34:24,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:34:24,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:24,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1144208086, now seen corresponding path program 1 times [2023-11-23 22:34:24,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:24,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924501571] [2023-11-23 22:34:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:24,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:25,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:25,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:25,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924501571] [2023-11-23 22:34:25,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924501571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:25,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931509314] [2023-11-23 22:34:25,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:25,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:25,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:25,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:25,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:34:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:27,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 5408 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:34:27,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:34:27,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:34:27,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931509314] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:27,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:27,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-23 22:34:27,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604751336] [2023-11-23 22:34:27,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:27,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:27,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:27,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:27,409 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) [2023-11-23 22:34:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:27,788 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-23 22:34:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:27,790 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 [2023-11-23 22:34:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:27,791 INFO L225 Difference]: With dead ends: 66 [2023-11-23 22:34:27,791 INFO L226 Difference]: Without dead ends: 46 [2023-11-23 22:34:27,791 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 [2023-11-23 22:34:27,793 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:27,793 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] [2023-11-23 22:34:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-23 22:34:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-23 22:34:27,798 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) [2023-11-23 22:34:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2023-11-23 22:34:27,799 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 28 [2023-11-23 22:34:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:27,800 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2023-11-23 22:34:27,800 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) [2023-11-23 22:34:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2023-11-23 22:34:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 22:34:27,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:27,802 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] [2023-11-23 22:34:27,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:28,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:28,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:28,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:28,003 INFO L85 PathProgramCache]: Analyzing trace with hash -372313272, now seen corresponding path program 1 times [2023-11-23 22:34:28,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:28,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568666419] [2023-11-23 22:34:28,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:28,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:34:29,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568666419] [2023-11-23 22:34:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568666419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879525278] [2023-11-23 22:34:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:29,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:29,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:29,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:29,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:34:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:30,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 5426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:34:30,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 22:34:30,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:34:30,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879525278] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:30,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:30,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-23 22:34:30,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433068828] [2023-11-23 22:34:30,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:30,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:30,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:30,963 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) [2023-11-23 22:34:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:31,332 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-11-23 22:34:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:31,333 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 [2023-11-23 22:34:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:31,334 INFO L225 Difference]: With dead ends: 57 [2023-11-23 22:34:31,334 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 22:34:31,334 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 [2023-11-23 22:34:31,335 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:31,335 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] [2023-11-23 22:34:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 22:34:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-23 22:34:31,340 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) [2023-11-23 22:34:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2023-11-23 22:34:31,340 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2023-11-23 22:34:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:31,341 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2023-11-23 22:34:31,341 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) [2023-11-23 22:34:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2023-11-23 22:34:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 22:34:31,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:31,342 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] [2023-11-23 22:34:31,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:31,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:31,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:31,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:31,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2044304526, now seen corresponding path program 1 times [2023-11-23 22:34:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134823266] [2023-11-23 22:34:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:34:32,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134823266] [2023-11-23 22:34:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134823266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953642399] [2023-11-23 22:34:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:32,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:32,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:32,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:32,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:34:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:34,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 22:34:34,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:34:34,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:34:34,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953642399] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:34,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:34,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-23 22:34:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969869695] [2023-11-23 22:34:34,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:34,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:34:34,167 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) [2023-11-23 22:34:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:34,506 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-11-23 22:34:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:34,507 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 [2023-11-23 22:34:34,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:34,508 INFO L225 Difference]: With dead ends: 74 [2023-11-23 22:34:34,508 INFO L226 Difference]: Without dead ends: 48 [2023-11-23 22:34:34,508 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 [2023-11-23 22:34:34,509 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 [2023-11-23 22:34:34,510 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] [2023-11-23 22:34:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-23 22:34:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-23 22:34:34,514 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) [2023-11-23 22:34:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2023-11-23 22:34:34,515 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 34 [2023-11-23 22:34:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:34,515 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2023-11-23 22:34:34,516 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) [2023-11-23 22:34:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2023-11-23 22:34:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 22:34:34,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:34,517 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] [2023-11-23 22:34:34,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:34,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:34,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:34,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -359810836, now seen corresponding path program 1 times [2023-11-23 22:34:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:34,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930084929] [2023-11-23 22:34:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:34:36,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:36,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930084929] [2023-11-23 22:34:36,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930084929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:36,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711152663] [2023-11-23 22:34:36,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:36,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:36,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:36,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:36,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:34:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:37,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 5450 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:34:37,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:34:37,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:34:37,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711152663] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:37,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-23 22:34:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304358974] [2023-11-23 22:34:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:37,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:37,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:34:37,517 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) [2023-11-23 22:34:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:37,900 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2023-11-23 22:34:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:37,901 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 [2023-11-23 22:34:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:37,902 INFO L225 Difference]: With dead ends: 64 [2023-11-23 22:34:37,902 INFO L226 Difference]: Without dead ends: 49 [2023-11-23 22:34:37,902 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 [2023-11-23 22:34:37,903 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 [2023-11-23 22:34:37,903 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] [2023-11-23 22:34:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-23 22:34:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-23 22:34:37,914 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) [2023-11-23 22:34:37,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-23 22:34:37,914 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 37 [2023-11-23 22:34:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:37,915 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-23 22:34:37,915 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) [2023-11-23 22:34:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-23 22:34:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 22:34:37,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:37,918 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] [2023-11-23 22:34:37,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:38,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:38,132 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:38,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash 242160194, now seen corresponding path program 1 times [2023-11-23 22:34:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:38,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366540513] [2023-11-23 22:34:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:38,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:34:39,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:39,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366540513] [2023-11-23 22:34:39,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366540513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:39,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110405324] [2023-11-23 22:34:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:39,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:39,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:39,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:39,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:34:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:40,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 5456 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:34:40,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:34:40,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:34:40,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110405324] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:40,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:40,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-23 22:34:40,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125093941] [2023-11-23 22:34:40,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:40,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:34:40,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:40,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:34:40,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:34:40,564 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) [2023-11-23 22:34:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:40,832 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-23 22:34:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:34:40,832 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 [2023-11-23 22:34:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:40,834 INFO L225 Difference]: With dead ends: 54 [2023-11-23 22:34:40,834 INFO L226 Difference]: Without dead ends: 50 [2023-11-23 22:34:40,834 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 [2023-11-23 22:34:40,835 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 [2023-11-23 22:34:40,835 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] [2023-11-23 22:34:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-23 22:34:40,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-23 22:34:40,840 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) [2023-11-23 22:34:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2023-11-23 22:34:40,841 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 40 [2023-11-23 22:34:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:40,841 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2023-11-23 22:34:40,841 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) [2023-11-23 22:34:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2023-11-23 22:34:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 22:34:40,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:40,842 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] [2023-11-23 22:34:40,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:41,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:41,043 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:41,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:41,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1371144433, now seen corresponding path program 1 times [2023-11-23 22:34:41,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:41,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473731708] [2023-11-23 22:34:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:41,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:34:42,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473731708] [2023-11-23 22:34:42,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473731708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:42,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781814515] [2023-11-23 22:34:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:42,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:42,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:42,261 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:42,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:34:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:43,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 5462 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 22:34:43,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 22:34:43,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:34:43,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781814515] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:43,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 22:34:43,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 6] total 9 [2023-11-23 22:34:43,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977385632] [2023-11-23 22:34:43,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:34:43,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:34:43,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:43,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:34:43,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:34:43,690 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:44,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:44,077 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2023-11-23 22:34:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:34:44,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-23 22:34:44,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:44,079 INFO L225 Difference]: With dead ends: 60 [2023-11-23 22:34:44,079 INFO L226 Difference]: Without dead ends: 51 [2023-11-23 22:34:44,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:34:44,080 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:44,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:34:44,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-23 22:34:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-23 22:34:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.34) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:34:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2023-11-23 22:34:44,087 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 43 [2023-11-23 22:34:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:44,088 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2023-11-23 22:34:44,088 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) [2023-11-23 22:34:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2023-11-23 22:34:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 22:34:44,090 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:44,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:34:44,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:44,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:44,291 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:44,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1175858717, now seen corresponding path program 1 times [2023-11-23 22:34:44,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:44,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735917850] [2023-11-23 22:34:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:44,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:34:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735917850] [2023-11-23 22:34:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735917850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:45,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70915087] [2023-11-23 22:34:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:45,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:45,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:45,180 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:45,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:34:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:46,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 5476 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:34:46,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 22:34:46,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 22:34:46,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70915087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:46,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:34:46,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2023-11-23 22:34:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417469197] [2023-11-23 22:34:46,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:46,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:34:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:34:46,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:34:46,612 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 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) [2023-11-23 22:34:47,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:34:47,053 INFO L93 Difference]: Finished difference Result 97 states and 132 transitions. [2023-11-23 22:34:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:34:47,054 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 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) Word has length 46 [2023-11-23 22:34:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:34:47,055 INFO L225 Difference]: With dead ends: 97 [2023-11-23 22:34:47,055 INFO L226 Difference]: Without dead ends: 61 [2023-11-23 22:34:47,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:34:47,056 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:34:47,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 192 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:34:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-23 22:34:47,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-23 22:34:47,061 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) [2023-11-23 22:34:47,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2023-11-23 22:34:47,062 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 46 [2023-11-23 22:34:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:34:47,062 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2023-11-23 22:34:47,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 8 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) [2023-11-23 22:34:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2023-11-23 22:34:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 22:34:47,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:34:47,063 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] [2023-11-23 22:34:47,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:34:47,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 22:34:47,264 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:34:47,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:34:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1861807109, now seen corresponding path program 2 times [2023-11-23 22:34:47,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:34:47,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340286124] [2023-11-23 22:34:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:34:47,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:34:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:34:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 22:34:48,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:34:48,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340286124] [2023-11-23 22:34:48,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340286124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:34:48,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165071386] [2023-11-23 22:34:48,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:34:48,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:34:48,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:34:48,437 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:34:48,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a6362bd-6929-4528-b8e3-d4c03c5cab80/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:34:49,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:34:49,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:34:49,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 5541 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:34:49,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:34:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 22:34:49,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:34:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 22:34:49,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165071386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:34:49,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:34:49,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2023-11-23 22:34:49,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109651202] [2023-11-23 22:34:49,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:34:49,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:34:49,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:34:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:34:49,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:34:49,868 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)