./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/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 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac --- 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 18:16:47,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:16:47,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:16:47,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:16:47,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:16:47,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:16:47,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:16:47,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:16:47,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:16:47,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:16:47,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:16:47,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:16:47,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:16:47,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:16:47,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:16:47,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:16:47,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:16:47,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:16:47,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:16:47,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:16:47,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:16:47,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:16:47,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:16:47,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:16:47,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:16:47,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:16:47,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:16:47,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:16:47,618 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:16:47,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:16:47,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:16:47,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:16:47,620 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:16:47,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:16:47,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:16:47,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:16:47,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:16:47,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:16:47,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:16:47,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:16:47,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:16:47,625 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 18:16:47,647 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:16:47,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:16:47,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:16:47,648 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:16:47,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:16:47,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:16:47,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:16:47,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:16:47,649 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:16:47,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:16:47,650 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:16:47,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:16:47,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:16:47,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:16:47,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:16:47,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:16:47,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:16:47,651 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:16:47,651 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:16:47,651 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:16:47,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:16:47,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:16:47,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:16:47,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:16:47,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:16:47,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:16:47,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:16:47,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:16:47,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:16:47,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:16:47,653 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:16:47,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:16:47,654 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:16:47,654 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:16:47,654 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:16:47,654 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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac [2022-12-13 18:16:47,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:16:47,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:16:47,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:16:47,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:16:47,883 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:16:47,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2022-12-13 18:16:50,405 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:16:50,545 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:16:50,546 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2022-12-13 18:16:50,550 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/data/6c04b8096/2b331162abd24e2cb36e69c4b33cb213/FLAGa0247cf04 [2022-12-13 18:16:50,968 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/data/6c04b8096/2b331162abd24e2cb36e69c4b33cb213 [2022-12-13 18:16:50,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:16:50,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:16:50,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:16:50,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:16:50,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:16:50,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:16:50" (1/1) ... [2022-12-13 18:16:50,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3679e6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:50, skipping insertion in model container [2022-12-13 18:16:50,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:16:50" (1/1) ... [2022-12-13 18:16:50,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:16:50,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:16:51,105 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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2022-12-13 18:16:51,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:16:51,132 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:16:51,141 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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2022-12-13 18:16:51,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:16:51,161 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:16:51,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51 WrapperNode [2022-12-13 18:16:51,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:16:51,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:16:51,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:16:51,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:16:51,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,191 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2022-12-13 18:16:51,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:16:51,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:16:51,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:16:51,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:16:51,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:16:51,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:16:51,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:16:51,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:16:51,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (1/1) ... [2022-12-13 18:16:51,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:16:51,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:51,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:16:51,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:16:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:16:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:16:51,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:16:51,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:16:51,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 18:16:51,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 18:16:51,330 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:16:51,331 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:16:51,433 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:16:51,438 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:16:51,438 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 18:16:51,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:16:51 BoogieIcfgContainer [2022-12-13 18:16:51,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:16:51,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:16:51,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:16:51,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:16:51,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:16:50" (1/3) ... [2022-12-13 18:16:51,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c87a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:16:51, skipping insertion in model container [2022-12-13 18:16:51,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:51" (2/3) ... [2022-12-13 18:16:51,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c87a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:16:51, skipping insertion in model container [2022-12-13 18:16:51,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:16:51" (3/3) ... [2022-12-13 18:16:51,455 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2022-12-13 18:16:51,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:16:51,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 18:16:51,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:16:51,519 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;@125ab56, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:16:51,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 18:16:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 18:16:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:16:51,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:16:51,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:51,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:16:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2022-12-13 18:16:51,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:16:51,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672546632] [2022-12-13 18:16:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:51,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:16:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:51,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:16:51,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672546632] [2022-12-13 18:16:51,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 18:16:51,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229996246] [2022-12-13 18:16:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:51,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:51,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:51,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:16:51,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:16:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 18:16:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:51,700 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 18:16:51,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:16:51,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229996246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:16:51,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:16:51,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:16:51,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971691308] [2022-12-13 18:16:51,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:16:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:16:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:16:51,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:16:51,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:16:51,740 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:51,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:16:51,762 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2022-12-13 18:16:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:16:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 18:16:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:16:51,771 INFO L225 Difference]: With dead ends: 40 [2022-12-13 18:16:51,771 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 18:16:51,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:16:51,776 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2022-12-13 18:16:51,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:16:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 18:16:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-13 18:16:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 18:16:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-12-13 18:16:51,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2022-12-13 18:16:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:16:51,803 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-12-13 18:16:51,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-12-13 18:16:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 18:16:51,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:16:51,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:51,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:16:52,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 18:16:52,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:16:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:52,006 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2022-12-13 18:16:52,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:16:52,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358841087] [2022-12-13 18:16:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:52,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:16:52,019 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:16:52,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020845287] [2022-12-13 18:16:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:52,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:52,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:52,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:16:52,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:16:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:16:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:16:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:16:52,099 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 18:16:52,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:16:52,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:16:52,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358841087] [2022-12-13 18:16:52,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:16:52,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020845287] [2022-12-13 18:16:52,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020845287] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:16:52,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:16:52,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:16:52,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267058801] [2022-12-13 18:16:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:16:52,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:16:52,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:16:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:16:52,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:16:52,103 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:16:52,117 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-12-13 18:16:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:16:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 18:16:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:16:52,119 INFO L225 Difference]: With dead ends: 28 [2022-12-13 18:16:52,119 INFO L226 Difference]: Without dead ends: 19 [2022-12-13 18:16:52,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:16:52,120 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:16:52,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:16:52,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-13 18:16:52,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-13 18:16:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 18:16:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-12-13 18:16:52,125 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2022-12-13 18:16:52,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:16:52,125 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-12-13 18:16:52,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:16:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-12-13 18:16:52,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 18:16:52,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:16:52,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:16:52,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:16:52,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:52,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:16:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:16:52,330 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2022-12-13 18:16:52,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:16:52,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079924862] [2022-12-13 18:16:52,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:52,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:16:52,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:16:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335974986] [2022-12-13 18:16:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:16:52,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:52,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:52,365 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:16:52,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:16:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:16:52,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:16:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:16:52,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:16:52,433 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:16:52,434 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 18:16:52,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 18:16:52,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:16:52,646 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 18:16:52,656 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 18:16:52,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 06:16:52 BoogieIcfgContainer [2022-12-13 18:16:52,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 18:16:52,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 18:16:52,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 18:16:52,689 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 18:16:52,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:16:51" (3/4) ... [2022-12-13 18:16:52,692 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 18:16:52,692 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 18:16:52,693 INFO L158 Benchmark]: Toolchain (without parser) took 1721.51ms. Allocated memory was 125.8MB in the beginning and 169.9MB in the end (delta: 44.0MB). Free memory was 75.2MB in the beginning and 102.8MB in the end (delta: -27.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-13 18:16:52,693 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 125.8MB. Free memory is still 101.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:16:52,694 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.85ms. Allocated memory is still 125.8MB. Free memory was 75.2MB in the beginning and 64.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 18:16:52,694 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.00ms. Allocated memory is still 125.8MB. Free memory was 64.5MB in the beginning and 62.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:16:52,695 INFO L158 Benchmark]: Boogie Preprocessor took 16.07ms. Allocated memory is still 125.8MB. Free memory was 62.8MB in the beginning and 61.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 18:16:52,695 INFO L158 Benchmark]: RCFGBuilder took 231.04ms. Allocated memory is still 125.8MB. Free memory was 61.6MB in the beginning and 51.4MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 18:16:52,696 INFO L158 Benchmark]: TraceAbstraction took 1238.40ms. Allocated memory is still 169.9MB. Free memory was 140.0MB in the beginning and 102.8MB in the end (delta: 37.3MB). Peak memory consumption was 36.8MB. Max. memory is 16.1GB. [2022-12-13 18:16:52,696 INFO L158 Benchmark]: Witness Printer took 3.90ms. Allocated memory is still 169.9MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 18:16:52,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 125.8MB. Free memory is still 101.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 189.85ms. Allocated memory is still 125.8MB. Free memory was 75.2MB in the beginning and 64.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.00ms. Allocated memory is still 125.8MB. Free memory was 64.5MB in the beginning and 62.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.07ms. Allocated memory is still 125.8MB. Free memory was 62.8MB in the beginning and 61.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 231.04ms. Allocated memory is still 125.8MB. Free memory was 61.6MB in the beginning and 51.4MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1238.40ms. Allocated memory is still 169.9MB. Free memory was 140.0MB in the beginning and 102.8MB in the end (delta: 37.3MB). Peak memory consumption was 36.8MB. Max. memory is 16.1GB. * Witness Printer took 3.90ms. Allocated memory is still 169.9MB. Free memory is still 102.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<50 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 86 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 38 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 48 mSDtfsCounter, 8 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 90 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-13 18:16:52,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/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 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac --- 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 18:16:54,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:16:54,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:16:54,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:16:54,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:16:54,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:16:54,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:16:54,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:16:54,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:16:54,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:16:54,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:16:54,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:16:54,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:16:54,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:16:54,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:16:54,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:16:54,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:16:54,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:16:54,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:16:54,468 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:16:54,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:16:54,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:16:54,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:16:54,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:16:54,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:16:54,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:16:54,474 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:16:54,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:16:54,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:16:54,475 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:16:54,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:16:54,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:16:54,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:16:54,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:16:54,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:16:54,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:16:54,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:16:54,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:16:54,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:16:54,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:16:54,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:16:54,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-12-13 18:16:54,495 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:16:54,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:16:54,496 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:16:54,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:16:54,496 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:16:54,496 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:16:54,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:16:54,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:16:54,497 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:16:54,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:16:54,497 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:16:54,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:16:54,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:16:54,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:16:54,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:16:54,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:16:54,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:16:54,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:16:54,500 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:16:54,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:16:54,500 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 18:16:54,500 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:16:54,500 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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eead35b52b146e528d3235895e151889bbf52901c3f6d3c5a144d0412f9f4ac [2022-12-13 18:16:54,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:16:54,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:16:54,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:16:54,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:16:54,762 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:16:54,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2022-12-13 18:16:57,423 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:16:57,597 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:16:57,598 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c [2022-12-13 18:16:57,604 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/data/07e7a6547/82c6f633a0604ae983afc14e79664837/FLAGbaeaaf732 [2022-12-13 18:16:57,616 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/data/07e7a6547/82c6f633a0604ae983afc14e79664837 [2022-12-13 18:16:57,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:16:57,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:16:57,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:16:57,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:16:57,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:16:57,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@446eca82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57, skipping insertion in model container [2022-12-13 18:16:57,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:16:57,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:16:57,759 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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2022-12-13 18:16:57,778 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:16:57,790 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:16:57,802 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_c820faef-aa4b-46d4-87b9-f1ae767a7f06/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound50.c[709,722] [2022-12-13 18:16:57,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:16:57,825 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:16:57,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57 WrapperNode [2022-12-13 18:16:57,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:16:57,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:16:57,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:16:57,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:16:57,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,842 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,861 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-12-13 18:16:57,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:16:57,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:16:57,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:16:57,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:16:57,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,883 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:16:57,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:16:57,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:16:57,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:16:57,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (1/1) ... [2022-12-13 18:16:57,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:16:57,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:16:57,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:16:57,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:16:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:16:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 18:16:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:16:57,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:16:57,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 18:16:57,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 18:16:58,015 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:16:58,017 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:17:00,344 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:17:00,354 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:17:00,354 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 18:17:00,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:17:00 BoogieIcfgContainer [2022-12-13 18:17:00,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:17:00,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:17:00,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:17:00,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:17:00,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:16:57" (1/3) ... [2022-12-13 18:17:00,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c967880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:17:00, skipping insertion in model container [2022-12-13 18:17:00,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:16:57" (2/3) ... [2022-12-13 18:17:00,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c967880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:17:00, skipping insertion in model container [2022-12-13 18:17:00,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:17:00" (3/3) ... [2022-12-13 18:17:00,362 INFO L112 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound50.c [2022-12-13 18:17:00,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:17:00,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 18:17:00,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:17:00,412 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;@2109f263, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:17:00,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 18:17:00,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 18:17:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:17:00,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:17:00,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:00,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:17:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2022-12-13 18:17:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:00,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230467738] [2022-12-13 18:17:00,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:00,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:00,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:00,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 18:17:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:00,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 18:17:00,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:00,596 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 18:17:00,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:00,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:00,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230467738] [2022-12-13 18:17:00,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230467738] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:00,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:00,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:17:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517886584] [2022-12-13 18:17:00,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:00,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:17:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:00,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:17:00,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:17:00,630 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:17:00,648 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2022-12-13 18:17:00,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:17:00,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 18:17:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:17:00,655 INFO L225 Difference]: With dead ends: 40 [2022-12-13 18:17:00,655 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 18:17:00,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:17:00,661 INFO L413 NwaCegarLoop]: 27 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, 27 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 [2022-12-13 18:17:00,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:17:00,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 18:17:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-13 18:17:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 18:17:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-12-13 18:17:00,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2022-12-13 18:17:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:17:00,689 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-12-13 18:17:00,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-12-13 18:17:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 18:17:00,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:17:00,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:00,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:17:00,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:00,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:17:00,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:00,894 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2022-12-13 18:17:00,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728414537] [2022-12-13 18:17:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:00,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:00,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:00,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 18:17:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 18:17:01,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:01,126 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 18:17:01,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:01,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:01,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728414537] [2022-12-13 18:17:01,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728414537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:01,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:01,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:17:01,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334700076] [2022-12-13 18:17:01,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:01,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:17:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:17:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:17:01,129 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:17:01,154 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-12-13 18:17:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:17:01,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 18:17:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:17:01,156 INFO L225 Difference]: With dead ends: 28 [2022-12-13 18:17:01,156 INFO L226 Difference]: Without dead ends: 19 [2022-12-13 18:17:01,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:17:01,158 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:17:01,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:17:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-13 18:17:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-13 18:17:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 18:17:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-12-13 18:17:01,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2022-12-13 18:17:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:17:01,165 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-12-13 18:17:01,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-12-13 18:17:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 18:17:01,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:17:01,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:01,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 18:17:01,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:01,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:17:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2022-12-13 18:17:01,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:01,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305838493] [2022-12-13 18:17:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:01,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:01,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:01,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:01,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 18:17:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:17:01,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:17:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:17:01,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2022-12-13 18:17:01,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2017043461] [2022-12-13 18:17:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:01,658 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-13 18:17:01,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/cvc4 [2022-12-13 18:17:01,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-13 18:17:01,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-13 18:17:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:17:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:17:01,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:17:01,983 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 18:17:01,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:17:01,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 18:17:01,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305838493] [2022-12-13 18:17:01,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:17:01,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2017043461] [2022-12-13 18:17:01,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2017043461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:17:01,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:17:01,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:17:01,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931938188] [2022-12-13 18:17:01,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:17:01,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:17:01,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 18:17:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:17:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:17:01,986 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:04,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:07,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:09,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:11,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:15,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:17,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-13 18:17:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:17:17,410 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-12-13 18:17:17,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:17:17,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 18:17:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:17:17,518 INFO L225 Difference]: With dead ends: 33 [2022-12-13 18:17:17,518 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 18:17:17,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:17:17,519 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:17:17,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 6 Unknown, 0 Unchecked, 15.4s Time] [2022-12-13 18:17:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 18:17:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-12-13 18:17:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 18:17:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-12-13 18:17:17,527 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 8 [2022-12-13 18:17:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:17:17,527 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-12-13 18:17:17,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:17:17,527 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-12-13 18:17:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 18:17:17,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:17:17,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:17:17,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-13 18:17:17,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 18:17:17,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:17,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:17:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:17:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2022-12-13 18:17:17,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 18:17:17,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130697577] [2022-12-13 18:17:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:17,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 18:17:17,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 18:17:17,937 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 18:17:17,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 18:17:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:17:18,279 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:17:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:17:18,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Invalid model [2022-12-13 18:17:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2067231200] [2022-12-13 18:17:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:17:18,560 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-13 18:17:18,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/cvc4 [2022-12-13 18:17:18,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-13 18:17:18,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c820faef-aa4b-46d4-87b9-f1ae767a7f06/bin/uautomizer-uyxdKDjOR8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-13 18:17:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:17:18,964 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:17:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat