./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-loops/overflow_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-loops/overflow_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8 --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 fd15e6a5481e5709ee106d67fec16050e066e3720bb675b6df23302700c97f29 --- 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-2329fc7 [2022-12-13 21:40:11,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:40:11,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:40:11,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:40:11,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:40:11,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:40:11,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:40:11,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:40:11,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:40:11,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:40:11,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:40:11,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:40:11,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:40:11,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:40:11,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:40:11,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:40:11,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:40:11,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:40:11,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:40:11,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:40:11,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:40:11,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:40:11,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:40:11,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:40:11,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:40:11,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:40:11,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:40:11,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:40:11,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:40:11,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:40:11,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:40:11,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:40:11,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:40:11,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:40:11,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:40:11,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:40:11,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:40:11,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:40:11,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:40:11,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:40:11,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:40:11,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:40:11,582 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:40:11,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:40:11,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:40:11,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:40:11,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:40:11,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:40:11,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:40:11,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:40:11,584 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:40:11,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:40:11,585 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:40:11,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:40:11,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:40:11,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:40:11,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:40:11,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:40:11,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:40:11,586 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:40:11,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:40:11,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:40:11,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:40:11,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:40:11,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:40:11,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:40:11,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:40:11,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:40:11,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:40:11,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:40:11,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:40:11,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:40:11,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:40:11,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:40:11,589 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:40:11,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:40:11,590 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:40:11,590 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd15e6a5481e5709ee106d67fec16050e066e3720bb675b6df23302700c97f29 [2022-12-13 21:40:11,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:40:11,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:40:11,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:40:11,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:40:11,811 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:40:11,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2022-12-13 21:40:14,287 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:40:14,437 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:40:14,437 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2022-12-13 21:40:14,441 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/data/74b24fb4d/ae9dfad2d11544669147d769def0972c/FLAGd5d1fa73d [2022-12-13 21:40:14,862 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/data/74b24fb4d/ae9dfad2d11544669147d769def0972c [2022-12-13 21:40:14,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:40:14,866 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:40:14,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:40:14,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:40:14,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:40:14,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:40:14" (1/1) ... [2022-12-13 21:40:14,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617a2013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:14, skipping insertion in model container [2022-12-13 21:40:14,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:40:14" (1/1) ... [2022-12-13 21:40:14,877 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:40:14,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:40:14,978 WARN L237 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_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/sv-benchmarks/c/bitvector-loops/overflow_1-2.c[324,337] [2022-12-13 21:40:14,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:40:14,992 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:40:15,000 WARN L237 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_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/sv-benchmarks/c/bitvector-loops/overflow_1-2.c[324,337] [2022-12-13 21:40:15,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:40:15,010 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:40:15,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15 WrapperNode [2022-12-13 21:40:15,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:40:15,011 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:40:15,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:40:15,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:40:15,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,032 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23 [2022-12-13 21:40:15,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:40:15,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:40:15,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:40:15,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:40:15,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:40:15,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:40:15,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:40:15,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:40:15,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (1/1) ... [2022-12-13 21:40:15,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:40:15,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:40:15,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:40:15,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:40:15,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:40:15,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:40:15,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:40:15,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:40:15,149 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:40:15,150 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:40:15,214 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:40:15,219 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:40:15,219 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 21:40:15,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:40:15 BoogieIcfgContainer [2022-12-13 21:40:15,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:40:15,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:40:15,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:40:15,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:40:15,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:40:14" (1/3) ... [2022-12-13 21:40:15,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347e43bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:40:15, skipping insertion in model container [2022-12-13 21:40:15,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:40:15" (2/3) ... [2022-12-13 21:40:15,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347e43bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:40:15, skipping insertion in model container [2022-12-13 21:40:15,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:40:15" (3/3) ... [2022-12-13 21:40:15,228 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2022-12-13 21:40:15,242 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:40:15,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:40:15,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:40:15,282 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;@5431da0a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:40:15,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 21:40:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) [2022-12-13 21:40:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 21:40:15,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:40:15,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 21:40:15,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:40:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:15,294 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2022-12-13 21:40:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:40:15,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822237695] [2022-12-13 21:40:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:15,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:40:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:15,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:40:15,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822237695] [2022-12-13 21:40:15,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822237695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:40:15,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:40:15,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 21:40:15,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394037339] [2022-12-13 21:40:15,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:40:15,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:40:15,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:40:15,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:40:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:40:15,509 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:40:15,531 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-12-13 21:40:15,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:40:15,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-12-13 21:40:15,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:40:15,541 INFO L225 Difference]: With dead ends: 20 [2022-12-13 21:40:15,542 INFO L226 Difference]: Without dead ends: 8 [2022-12-13 21:40:15,544 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 [2022-12-13 21:40:15,548 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:40:15,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:40:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-13 21:40:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-13 21:40:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-12-13 21:40:15,581 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-12-13 21:40:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:40:15,581 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-12-13 21:40:15,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-12-13 21:40:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 21:40:15,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:40:15,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:15,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:40:15,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:40:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2022-12-13 21:40:15,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:40:15,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893105861] [2022-12-13 21:40:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:15,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:40:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:15,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:40:15,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893105861] [2022-12-13 21:40:15,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893105861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:40:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099678647] [2022-12-13 21:40:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:15,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:40:15,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:40:15,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:40:15,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:40:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:15,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 21:40:15,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:15,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:40:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:15,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099678647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:40:15,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:40:15,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 21:40:15,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040719835] [2022-12-13 21:40:15,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:40:15,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:40:15,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:40:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:40:15,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:40:15,826 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:15,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:40:15,862 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-12-13 21:40:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:40:15,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 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 7 [2022-12-13 21:40:15,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:40:15,863 INFO L225 Difference]: With dead ends: 15 [2022-12-13 21:40:15,863 INFO L226 Difference]: Without dead ends: 11 [2022-12-13 21:40:15,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 21:40:15,865 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:40:15,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:40:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-13 21:40:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-13 21:40:15,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-12-13 21:40:15,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2022-12-13 21:40:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:40:15,871 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-12-13 21:40:15,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-12-13 21:40:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 21:40:15,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:40:15,873 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:15,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:40:16,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:40:16,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:40:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:16,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2022-12-13 21:40:16,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:40:16,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890427431] [2022-12-13 21:40:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:16,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:40:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:16,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:40:16,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890427431] [2022-12-13 21:40:16,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890427431] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:40:16,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645092957] [2022-12-13 21:40:16,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 21:40:16,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:40:16,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:40:16,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:40:16,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:40:16,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 21:40:16,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:40:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 21:40:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:16,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:40:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:16,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645092957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:40:16,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:40:16,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 21:40:16,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996518898] [2022-12-13 21:40:16,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:40:16,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 21:40:16,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:40:16,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 21:40:16,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 21:40:16,461 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:40:16,626 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-12-13 21:40:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 21:40:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 21:40:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:40:16,628 INFO L225 Difference]: With dead ends: 21 [2022-12-13 21:40:16,628 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 21:40:16,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-12-13 21:40:16,629 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 21:40:16,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 21:40:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 21:40:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-13 21:40:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-12-13 21:40:16,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2022-12-13 21:40:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:40:16,636 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-12-13 21:40:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-12-13 21:40:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 21:40:16,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:40:16,637 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:16,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:40:16,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 21:40:16,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:40:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2022-12-13 21:40:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:40:16,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828393549] [2022-12-13 21:40:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:16,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:40:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:17,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:40:17,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828393549] [2022-12-13 21:40:17,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828393549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:40:17,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248711098] [2022-12-13 21:40:17,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 21:40:17,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:40:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:40:17,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:40:17,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:40:17,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 21:40:17,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:40:17,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 21:40:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:17,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:40:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:17,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248711098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:40:17,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:40:17,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 21:40:17,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226511585] [2022-12-13 21:40:17,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:40:17,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 21:40:17,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:40:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 21:40:17,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-12-13 21:40:17,456 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:40:18,602 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2022-12-13 21:40:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 21:40:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 21:40:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:40:18,603 INFO L225 Difference]: With dead ends: 33 [2022-12-13 21:40:18,603 INFO L226 Difference]: Without dead ends: 29 [2022-12-13 21:40:18,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 21:40:18,604 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 21:40:18,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 21:40:18,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-13 21:40:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-13 21:40:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-12-13 21:40:18,613 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2022-12-13 21:40:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:40:18,613 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-12-13 21:40:18,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:18,613 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-12-13 21:40:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 21:40:18,614 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:40:18,614 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:18,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:40:18,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:40:18,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:40:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times [2022-12-13 21:40:18,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:40:18,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340149371] [2022-12-13 21:40:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:18,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:40:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:19,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:40:19,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340149371] [2022-12-13 21:40:19,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340149371] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:40:19,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367619791] [2022-12-13 21:40:19,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 21:40:19,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:40:19,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:40:19,337 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:40:19,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 21:40:19,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 21:40:19,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:40:19,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 21:40:19,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:40:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:19,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:40:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:20,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367619791] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:40:20,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:40:20,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-13 21:40:20,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606820803] [2022-12-13 21:40:20,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:40:20,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 21:40:20,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:40:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 21:40:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1726, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 21:40:20,352 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:53,743 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 75 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:40:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 21:40:53,804 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2022-12-13 21:40:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 21:40:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 21:40:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 21:40:53,806 INFO L225 Difference]: With dead ends: 57 [2022-12-13 21:40:53,806 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 21:40:53,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=1264, Invalid=3847, Unknown=1, NotChecked=0, Total=5112 [2022-12-13 21:40:53,807 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 21:40:53,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 42 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 21:40:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 21:40:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-13 21:40:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-12-13 21:40:53,815 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 28 [2022-12-13 21:40:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 21:40:53,815 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-12-13 21:40:53,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:40:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-12-13 21:40:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 21:40:53,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 21:40:53,816 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2022-12-13 21:40:53,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 21:40:54,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:40:54,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 21:40:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:40:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 5 times [2022-12-13 21:40:54,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:40:54,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298256454] [2022-12-13 21:40:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:40:54,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:40:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:40:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:40:55,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:40:55,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298256454] [2022-12-13 21:40:55,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298256454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:40:55,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964891124] [2022-12-13 21:40:55,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 21:40:55,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:40:55,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:40:55,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:40:55,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_387bb90a-5ffd-46c6-8b45-5ff17f07d86b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 21:49:54,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 21:49:54,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 21:49:54,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 21:49:54,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:49:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:49:54,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:49:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:49:57,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964891124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:49:57,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:49:57,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-12-13 21:49:57,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318039191] [2022-12-13 21:49:57,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:49:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-13 21:49:57,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:49:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-13 21:49:57,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=6910, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 21:49:57,516 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 97 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:50:22,114 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 192 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:50:43,573 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 188 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:51:04,691 WARN L233 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 184 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:51:24,900 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 180 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:51:43,755 WARN L233 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 176 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 21:52:16,925 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 168 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)