./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --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 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:26:42,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:26:42,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:26:42,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:26:42,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:26:42,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:26:42,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:26:42,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:26:42,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:26:42,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:26:42,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:26:42,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:26:42,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:26:42,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:26:42,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:26:42,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:26:42,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:26:42,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:26:42,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:26:42,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:26:42,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:26:42,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:26:42,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:26:42,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:26:42,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:26:42,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:26:42,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:26:42,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:26:42,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:26:42,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:26:42,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:26:42,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:26:42,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:26:42,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:26:42,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:26:42,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:26:42,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:26:42,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:26:42,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:26:42,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:26:42,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:26:42,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:26:42,241 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:26:42,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:26:42,242 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:26:42,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:26:42,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:26:42,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:26:42,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:26:42,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:26:42,245 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:26:42,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:26:42,247 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:26:42,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:26:42,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:26:42,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:26:42,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:26:42,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:26:42,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:26:42,255 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:26:42,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:26:42,255 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:26:42,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:26:42,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:26:42,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:26:42,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:26:42,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:26:42,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:26:42,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:26:42,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:26:42,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:26:42,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:26:42,259 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:26:42,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:26:42,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:26:42,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ba3e3db8f44a5e9ad151b8422bee8deebac1dcf47a42cba5485daeafd8d8e80 [2022-10-17 10:26:42,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:26:42,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:26:42,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:26:42,576 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:26:42,579 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:26:42,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/bitvector/byte_add_1-1.i [2022-10-17 10:26:42,644 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/data/dd6b4384c/016d2fe1bdfe4cd6af14db0287d29b67/FLAG4cb32a230 [2022-10-17 10:26:43,103 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:26:43,104 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/sv-benchmarks/c/bitvector/byte_add_1-1.i [2022-10-17 10:26:43,141 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/data/dd6b4384c/016d2fe1bdfe4cd6af14db0287d29b67/FLAG4cb32a230 [2022-10-17 10:26:43,465 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/data/dd6b4384c/016d2fe1bdfe4cd6af14db0287d29b67 [2022-10-17 10:26:43,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:26:43,469 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:26:43,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:26:43,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:26:43,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:26:43,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:43,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6207dfbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43, skipping insertion in model container [2022-10-17 10:26:43,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:43,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:26:43,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:26:43,713 WARN L230 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_897aab1f-d566-4482-a4b9-208c67d0f60e/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2022-10-17 10:26:43,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:26:43,779 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:26:43,792 WARN L230 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_897aab1f-d566-4482-a4b9-208c67d0f60e/sv-benchmarks/c/bitvector/byte_add_1-1.i[1168,1181] [2022-10-17 10:26:43,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:26:43,856 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:26:43,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43 WrapperNode [2022-10-17 10:26:43,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:26:43,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:26:43,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:26:43,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:26:43,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:43,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:43,953 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 145 [2022-10-17 10:26:43,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:26:43,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:26:43,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:26:43,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:26:43,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:43,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:43,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:43,970 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:44,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:44,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:44,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:44,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:44,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:26:44,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:26:44,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:26:44,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:26:44,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (1/1) ... [2022-10-17 10:26:44,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:26:44,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:44,095 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:26:44,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:26:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:26:44,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:26:44,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:26:44,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:26:44,233 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:26:44,236 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:26:45,126 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:26:45,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:26:45,142 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:26:45,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:26:45 BoogieIcfgContainer [2022-10-17 10:26:45,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:26:45,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:26:45,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:26:45,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:26:45,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:26:43" (1/3) ... [2022-10-17 10:26:45,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfb6b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:26:45, skipping insertion in model container [2022-10-17 10:26:45,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:26:43" (2/3) ... [2022-10-17 10:26:45,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dfb6b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:26:45, skipping insertion in model container [2022-10-17 10:26:45,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:26:45" (3/3) ... [2022-10-17 10:26:45,154 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_1-1.i [2022-10-17 10:26:45,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:26:45,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:26:45,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:26:45,264 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=LoopsAndPotentialCycles, 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;@2c99f3c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:26:45,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:26:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 50 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:45,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 10:26:45,278 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:45,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:45,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:45,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:45,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1979526715, now seen corresponding path program 1 times [2022-10-17 10:26:45,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:45,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303925666] [2022-10-17 10:26:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:45,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:45,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:45,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303925666] [2022-10-17 10:26:45,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303925666] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:45,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:45,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:26:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833932583] [2022-10-17 10:26:45,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:45,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:26:45,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:45,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:26:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:26:45,609 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 50 states have internal predecessors, (88), 0 states have call successors, (0), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:45,641 INFO L93 Difference]: Finished difference Result 92 states and 160 transitions. [2022-10-17 10:26:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:26:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 10:26:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:45,663 INFO L225 Difference]: With dead ends: 92 [2022-10-17 10:26:45,664 INFO L226 Difference]: Without dead ends: 47 [2022-10-17 10:26:45,668 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 [2022-10-17 10:26:45,673 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:45,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:26:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-10-17 10:26:45,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-10-17 10:26:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 46 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:45,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2022-10-17 10:26:45,718 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 13 [2022-10-17 10:26:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:45,719 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2022-10-17 10:26:45,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2022-10-17 10:26:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 10:26:45,721 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:45,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:45,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:26:45,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash 726479629, now seen corresponding path program 1 times [2022-10-17 10:26:45,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:45,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815786506] [2022-10-17 10:26:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:45,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:46,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:46,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815786506] [2022-10-17 10:26:46,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815786506] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:46,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:46,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:26:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564611144] [2022-10-17 10:26:46,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:46,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:26:46,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:46,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:26:46,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:26:46,135 INFO L87 Difference]: Start difference. First operand 47 states and 78 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:46,310 INFO L93 Difference]: Finished difference Result 112 states and 190 transitions. [2022-10-17 10:26:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:26:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 10:26:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:46,313 INFO L225 Difference]: With dead ends: 112 [2022-10-17 10:26:46,313 INFO L226 Difference]: Without dead ends: 75 [2022-10-17 10:26:46,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:26:46,315 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:46,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 87 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:26:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-17 10:26:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-10-17 10:26:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.5138888888888888) internal successors, (109), 72 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 109 transitions. [2022-10-17 10:26:46,326 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 109 transitions. Word has length 13 [2022-10-17 10:26:46,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:46,327 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 109 transitions. [2022-10-17 10:26:46,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 109 transitions. [2022-10-17 10:26:46,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:26:46,328 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:46,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:46,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:26:46,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:46,330 INFO L85 PathProgramCache]: Analyzing trace with hash 727939832, now seen corresponding path program 1 times [2022-10-17 10:26:46,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:46,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253204203] [2022-10-17 10:26:46,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:46,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:26:46,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:46,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253204203] [2022-10-17 10:26:46,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253204203] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:46,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:46,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:26:46,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209456692] [2022-10-17 10:26:46,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:46,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:46,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:46,529 INFO L87 Difference]: Start difference. First operand 73 states and 109 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:46,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:46,783 INFO L93 Difference]: Finished difference Result 184 states and 301 transitions. [2022-10-17 10:26:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-10-17 10:26:46,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:46,790 INFO L225 Difference]: With dead ends: 184 [2022-10-17 10:26:46,791 INFO L226 Difference]: Without dead ends: 147 [2022-10-17 10:26:46,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:46,798 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 116 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:46,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 121 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:26:46,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-10-17 10:26:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 101. [2022-10-17 10:26:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.5) internal successors, (150), 100 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 150 transitions. [2022-10-17 10:26:46,817 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 150 transitions. Word has length 19 [2022-10-17 10:26:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:46,818 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 150 transitions. [2022-10-17 10:26:46,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 150 transitions. [2022-10-17 10:26:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:26:46,819 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:46,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:26:46,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash -302552601, now seen corresponding path program 1 times [2022-10-17 10:26:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:46,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442935233] [2022-10-17 10:26:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:46,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:26:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442935233] [2022-10-17 10:26:47,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442935233] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:47,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:47,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:26:47,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17013379] [2022-10-17 10:26:47,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:47,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:47,131 INFO L87 Difference]: Start difference. First operand 101 states and 150 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:47,353 INFO L93 Difference]: Finished difference Result 302 states and 441 transitions. [2022-10-17 10:26:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:26:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-10-17 10:26:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:47,356 INFO L225 Difference]: With dead ends: 302 [2022-10-17 10:26:47,356 INFO L226 Difference]: Without dead ends: 214 [2022-10-17 10:26:47,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:47,363 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 116 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:47,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 234 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:26:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-10-17 10:26:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 108. [2022-10-17 10:26:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.4953271028037383) internal successors, (160), 107 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2022-10-17 10:26:47,378 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 25 [2022-10-17 10:26:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:47,379 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2022-10-17 10:26:47,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2022-10-17 10:26:47,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:26:47,381 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:47,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:47,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:26:47,381 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1128243813, now seen corresponding path program 1 times [2022-10-17 10:26:47,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:47,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115447228] [2022-10-17 10:26:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:47,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:26:47,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:47,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115447228] [2022-10-17 10:26:47,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115447228] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:47,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:47,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:26:47,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679779131] [2022-10-17 10:26:47,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:47,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:26:47,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:47,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:26:47,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:26:47,634 INFO L87 Difference]: Start difference. First operand 108 states and 160 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:47,644 INFO L93 Difference]: Finished difference Result 195 states and 288 transitions. [2022-10-17 10:26:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:26:47,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 26 [2022-10-17 10:26:47,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:47,646 INFO L225 Difference]: With dead ends: 195 [2022-10-17 10:26:47,646 INFO L226 Difference]: Without dead ends: 97 [2022-10-17 10:26:47,650 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 [2022-10-17 10:26:47,651 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 71 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:47,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 72 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:26:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-17 10:26:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-10-17 10:26:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.46875) internal successors, (141), 96 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 141 transitions. [2022-10-17 10:26:47,675 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 141 transitions. Word has length 26 [2022-10-17 10:26:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:47,675 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 141 transitions. [2022-10-17 10:26:47,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 141 transitions. [2022-10-17 10:26:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-17 10:26:47,677 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:47,677 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] [2022-10-17 10:26:47,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:26:47,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:47,678 INFO L85 PathProgramCache]: Analyzing trace with hash 479327523, now seen corresponding path program 1 times [2022-10-17 10:26:47,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:47,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633399828] [2022-10-17 10:26:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:47,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:26:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633399828] [2022-10-17 10:26:47,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633399828] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:47,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:47,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:26:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669578591] [2022-10-17 10:26:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:47,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:47,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:47,902 INFO L87 Difference]: Start difference. First operand 97 states and 141 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:48,081 INFO L93 Difference]: Finished difference Result 292 states and 421 transitions. [2022-10-17 10:26:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:26:48,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-10-17 10:26:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:48,083 INFO L225 Difference]: With dead ends: 292 [2022-10-17 10:26:48,083 INFO L226 Difference]: Without dead ends: 206 [2022-10-17 10:26:48,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:48,084 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 103 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:48,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 213 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:26:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-10-17 10:26:48,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 105. [2022-10-17 10:26:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4326923076923077) internal successors, (149), 104 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 149 transitions. [2022-10-17 10:26:48,093 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 149 transitions. Word has length 32 [2022-10-17 10:26:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:48,094 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 149 transitions. [2022-10-17 10:26:48,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 149 transitions. [2022-10-17 10:26:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-17 10:26:48,096 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:48,096 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] [2022-10-17 10:26:48,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:26:48,096 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:48,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:48,097 INFO L85 PathProgramCache]: Analyzing trace with hash -91899916, now seen corresponding path program 1 times [2022-10-17 10:26:48,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:48,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386534690] [2022-10-17 10:26:48,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:48,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:26:48,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:48,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386534690] [2022-10-17 10:26:48,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386534690] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:48,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:48,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:26:48,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789138296] [2022-10-17 10:26:48,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:48,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:48,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:48,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:48,257 INFO L87 Difference]: Start difference. First operand 105 states and 149 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:48,470 INFO L93 Difference]: Finished difference Result 299 states and 446 transitions. [2022-10-17 10:26:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:48,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2022-10-17 10:26:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:48,472 INFO L225 Difference]: With dead ends: 299 [2022-10-17 10:26:48,472 INFO L226 Difference]: Without dead ends: 213 [2022-10-17 10:26:48,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:48,474 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 119 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:48,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 102 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:26:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-10-17 10:26:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 148. [2022-10-17 10:26:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.469387755102041) internal successors, (216), 147 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 216 transitions. [2022-10-17 10:26:48,483 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 216 transitions. Word has length 33 [2022-10-17 10:26:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:48,484 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 216 transitions. [2022-10-17 10:26:48,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 216 transitions. [2022-10-17 10:26:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 10:26:48,491 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:48,491 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:48,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:26:48,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash 606666271, now seen corresponding path program 1 times [2022-10-17 10:26:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:48,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157608395] [2022-10-17 10:26:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:48,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:26:48,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:48,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157608395] [2022-10-17 10:26:48,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157608395] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:26:48,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560433789] [2022-10-17 10:26:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:48,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:48,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:48,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:48,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:26:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:48,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:26:48,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:26:49,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:26:49,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560433789] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:49,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:26:49,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-10-17 10:26:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800893286] [2022-10-17 10:26:49,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:49,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:26:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:49,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:26:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:26:49,184 INFO L87 Difference]: Start difference. First operand 148 states and 216 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2022-10-17 10:26:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:49,312 INFO L93 Difference]: Finished difference Result 323 states and 480 transitions. [2022-10-17 10:26:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:49,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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 39 [2022-10-17 10:26:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:49,314 INFO L225 Difference]: With dead ends: 323 [2022-10-17 10:26:49,314 INFO L226 Difference]: Without dead ends: 181 [2022-10-17 10:26:49,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:26:49,316 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 124 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:49,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 85 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:26:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-10-17 10:26:49,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 163. [2022-10-17 10:26:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.4012345679012346) internal successors, (227), 162 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 227 transitions. [2022-10-17 10:26:49,325 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 227 transitions. Word has length 39 [2022-10-17 10:26:49,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:49,326 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 227 transitions. [2022-10-17 10:26:49,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2022-10-17 10:26:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 227 transitions. [2022-10-17 10:26:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 10:26:49,328 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:49,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:49,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:26:49,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:26:49,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:49,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:49,543 INFO L85 PathProgramCache]: Analyzing trace with hash -678904147, now seen corresponding path program 1 times [2022-10-17 10:26:49,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:49,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199437074] [2022-10-17 10:26:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:49,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-10-17 10:26:49,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:49,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199437074] [2022-10-17 10:26:49,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199437074] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:49,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:49,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:26:49,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26491359] [2022-10-17 10:26:49,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:49,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:26:49,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:26:49,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:26:49,834 INFO L87 Difference]: Start difference. First operand 163 states and 227 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2022-10-17 10:26:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:50,013 INFO L93 Difference]: Finished difference Result 442 states and 625 transitions. [2022-10-17 10:26:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:26:50,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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 53 [2022-10-17 10:26:50,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:50,016 INFO L225 Difference]: With dead ends: 442 [2022-10-17 10:26:50,016 INFO L226 Difference]: Without dead ends: 297 [2022-10-17 10:26:50,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:50,018 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 109 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:50,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 98 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:26:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-10-17 10:26:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 215. [2022-10-17 10:26:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4345794392523366) internal successors, (307), 214 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 307 transitions. [2022-10-17 10:26:50,035 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 307 transitions. Word has length 53 [2022-10-17 10:26:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:50,039 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 307 transitions. [2022-10-17 10:26:50,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2022-10-17 10:26:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 307 transitions. [2022-10-17 10:26:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 10:26:50,047 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:50,047 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:50,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:26:50,047 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1974065164, now seen corresponding path program 1 times [2022-10-17 10:26:50,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:50,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23228552] [2022-10-17 10:26:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:50,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-17 10:26:50,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:50,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23228552] [2022-10-17 10:26:50,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23228552] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:50,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:50,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:26:50,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654067391] [2022-10-17 10:26:50,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:50,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:26:50,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:50,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:26:50,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:26:50,357 INFO L87 Difference]: Start difference. First operand 215 states and 307 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:50,693 INFO L93 Difference]: Finished difference Result 841 states and 1205 transitions. [2022-10-17 10:26:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:26:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-10-17 10:26:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:50,698 INFO L225 Difference]: With dead ends: 841 [2022-10-17 10:26:50,699 INFO L226 Difference]: Without dead ends: 645 [2022-10-17 10:26:50,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:26:50,700 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 187 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:50,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 340 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:26:50,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-10-17 10:26:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 215. [2022-10-17 10:26:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4345794392523366) internal successors, (307), 214 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 307 transitions. [2022-10-17 10:26:50,718 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 307 transitions. Word has length 66 [2022-10-17 10:26:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:50,718 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 307 transitions. [2022-10-17 10:26:50,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 307 transitions. [2022-10-17 10:26:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-17 10:26:50,720 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:50,720 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:50,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:26:50,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1724423468, now seen corresponding path program 1 times [2022-10-17 10:26:50,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:50,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601957394] [2022-10-17 10:26:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-17 10:26:51,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:51,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601957394] [2022-10-17 10:26:51,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601957394] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:51,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:51,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:26:51,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541579822] [2022-10-17 10:26:51,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:51,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:26:51,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:51,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:26:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:26:51,044 INFO L87 Difference]: Start difference. First operand 215 states and 307 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:51,547 INFO L93 Difference]: Finished difference Result 1060 states and 1515 transitions. [2022-10-17 10:26:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:26:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-10-17 10:26:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:51,555 INFO L225 Difference]: With dead ends: 1060 [2022-10-17 10:26:51,563 INFO L226 Difference]: Without dead ends: 864 [2022-10-17 10:26:51,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:26:51,565 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 281 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:51,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 577 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:26:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-10-17 10:26:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 215. [2022-10-17 10:26:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4345794392523366) internal successors, (307), 214 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 307 transitions. [2022-10-17 10:26:51,586 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 307 transitions. Word has length 67 [2022-10-17 10:26:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:51,587 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 307 transitions. [2022-10-17 10:26:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 307 transitions. [2022-10-17 10:26:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-17 10:26:51,588 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:51,589 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:51,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:26:51,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash 608969170, now seen corresponding path program 1 times [2022-10-17 10:26:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:51,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515054536] [2022-10-17 10:26:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:51,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-17 10:26:51,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:51,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515054536] [2022-10-17 10:26:51,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515054536] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:26:51,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:26:51,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:26:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133901584] [2022-10-17 10:26:51,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:26:51,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:26:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:26:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:26:51,955 INFO L87 Difference]: Start difference. First operand 215 states and 307 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:52,608 INFO L93 Difference]: Finished difference Result 1079 states and 1536 transitions. [2022-10-17 10:26:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:26:52,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-10-17 10:26:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:52,614 INFO L225 Difference]: With dead ends: 1079 [2022-10-17 10:26:52,614 INFO L226 Difference]: Without dead ends: 883 [2022-10-17 10:26:52,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:26:52,616 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 375 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:52,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 669 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:26:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-10-17 10:26:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 211. [2022-10-17 10:26:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.4428571428571428) internal successors, (303), 210 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 303 transitions. [2022-10-17 10:26:52,650 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 303 transitions. Word has length 67 [2022-10-17 10:26:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:52,650 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 303 transitions. [2022-10-17 10:26:52,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 303 transitions. [2022-10-17 10:26:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-10-17 10:26:52,651 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:52,652 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:52,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:26:52,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:52,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:52,653 INFO L85 PathProgramCache]: Analyzing trace with hash 124562097, now seen corresponding path program 1 times [2022-10-17 10:26:52,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:52,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586615] [2022-10-17 10:26:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:52,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-17 10:26:52,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586615] [2022-10-17 10:26:52,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586615] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:26:52,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482080518] [2022-10-17 10:26:52,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:52,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:52,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:52,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:52,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:26:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:53,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:26:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:26:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-17 10:26:53,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:26:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 10:26:53,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482080518] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:26:53,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:26:53,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2022-10-17 10:26:53,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824712846] [2022-10-17 10:26:53,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:26:53,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:26:53,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:26:53,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:26:53,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:26:53,449 INFO L87 Difference]: Start difference. First operand 211 states and 303 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:26:53,922 INFO L93 Difference]: Finished difference Result 1163 states and 1662 transitions. [2022-10-17 10:26:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:26:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-10-17 10:26:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:26:53,929 INFO L225 Difference]: With dead ends: 1163 [2022-10-17 10:26:53,929 INFO L226 Difference]: Without dead ends: 954 [2022-10-17 10:26:53,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:26:53,930 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 592 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:26:53,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 292 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:26:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-10-17 10:26:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 717. [2022-10-17 10:26:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.437150837988827) internal successors, (1029), 716 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1029 transitions. [2022-10-17 10:26:53,976 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1029 transitions. Word has length 69 [2022-10-17 10:26:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:26:53,977 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 1029 transitions. [2022-10-17 10:26:53,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:26:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1029 transitions. [2022-10-17 10:26:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-10-17 10:26:53,979 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:26:53,979 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:26:54,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:26:54,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:54,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:26:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:26:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1027009864, now seen corresponding path program 1 times [2022-10-17 10:26:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:26:54,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332019227] [2022-10-17 10:26:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:54,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:26:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-10-17 10:26:54,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:26:54,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332019227] [2022-10-17 10:26:54,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332019227] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:26:54,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651320123] [2022-10-17 10:26:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:26:54,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:26:54,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:26:54,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:26:54,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_897aab1f-d566-4482-a4b9-208c67d0f60e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:26:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:26:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 10:26:54,877 INFO L286 TraceCheckSpWp]: Computing forward predicates...