./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i --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_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/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_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/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_cd1d3521-220c-4e79-9e7b-8fba22bec844/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 a2fc902d06a9677a744e95b3e4aa2d9ade69a1fc168c97563c1ba760b1699777 --- 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 16:01:13,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:01:13,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:01:13,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:01:13,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:01:13,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:01:13,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:01:13,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:01:13,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:01:13,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:01:13,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:01:13,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:01:13,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:01:13,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:01:13,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:01:13,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:01:13,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:01:13,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:01:13,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:01:13,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:01:13,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:01:13,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:01:13,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:01:13,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:01:13,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:01:13,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:01:13,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:01:13,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:01:13,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:01:13,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:01:13,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:01:13,623 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:01:13,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:01:13,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:01:13,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:01:13,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:01:13,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:01:13,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:01:13,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:01:13,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:01:13,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:01:13,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:01:13,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:01:13,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:01:13,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:01:13,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:01:13,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:01:13,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:01:13,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:01:13,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:01:13,659 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:01:13,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:01:13,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:01:13,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:01:13,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:01:13,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:01:13,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:01:13,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:01:13,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:01:13,661 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:01:13,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:01:13,661 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:01:13,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:01:13,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:01:13,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:01:13,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:01:13,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:01:13,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:01:13,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:01:13,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:01:13,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:01:13,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:01:13,663 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:01:13,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:01:13,663 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:01:13,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:01:13,663 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:01:13,664 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_cd1d3521-220c-4e79-9e7b-8fba22bec844/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2fc902d06a9677a744e95b3e4aa2d9ade69a1fc168c97563c1ba760b1699777 [2022-12-13 16:01:13,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:01:13,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:01:13,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:01:13,888 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:01:13,889 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:01:13,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i [2022-12-13 16:01:16,469 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:01:16,621 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:01:16,622 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i [2022-12-13 16:01:16,627 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/data/b9e232100/4b208fa9a05b47aa821d449823b8755c/FLAGa72d57e65 [2022-12-13 16:01:16,637 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/data/b9e232100/4b208fa9a05b47aa821d449823b8755c [2022-12-13 16:01:16,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:01:16,641 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:01:16,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:01:16,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:01:16,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:01:16,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe33bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16, skipping insertion in model container [2022-12-13 16:01:16,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:01:16,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:01:16,791 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_cd1d3521-220c-4e79-9e7b-8fba22bec844/sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i[821,834] [2022-12-13 16:01:16,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:01:16,807 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:01:16,816 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_cd1d3521-220c-4e79-9e7b-8fba22bec844/sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i[821,834] [2022-12-13 16:01:16,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:01:16,829 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:01:16,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16 WrapperNode [2022-12-13 16:01:16,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:01:16,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:01:16,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:01:16,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:01:16,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,840 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,852 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-12-13 16:01:16,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:01:16,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:01:16,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:01:16,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:01:16,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,865 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:01:16,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:01:16,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:01:16,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:01:16,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (1/1) ... [2022-12-13 16:01:16,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:01:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:01:16,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:01:16,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:01:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:01:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:01:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:01:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:01:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:01:16,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:01:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:01:16,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:01:16,973 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:01:16,975 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:01:17,058 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:01:17,063 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:01:17,063 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 16:01:17,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:01:17 BoogieIcfgContainer [2022-12-13 16:01:17,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:01:17,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:01:17,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:01:17,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:01:17,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:01:16" (1/3) ... [2022-12-13 16:01:17,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9c19ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:01:17, skipping insertion in model container [2022-12-13 16:01:17,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:01:16" (2/3) ... [2022-12-13 16:01:17,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9c19ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:01:17, skipping insertion in model container [2022-12-13 16:01:17,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:01:17" (3/3) ... [2022-12-13 16:01:17,071 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2022-12-13 16:01:17,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:01:17,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:01:17,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:01:17,127 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;@61ff5e47, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:01:17,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 16:01:17,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 16:01:17,135 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:01:17,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:01:17,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:01:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:01:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2005182879, now seen corresponding path program 1 times [2022-12-13 16:01:17,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:01:17,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506924619] [2022-12-13 16:01:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:17,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:01:17,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:17,314 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 16:01:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:01:17,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506924619] [2022-12-13 16:01:17,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506924619] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:01:17,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:01:17,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:01:17,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965222130] [2022-12-13 16:01:17,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:01:17,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:01:17,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:01:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:01:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:01:17,344 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:01:17,380 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2022-12-13 16:01:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:01:17,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 16:01:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:01:17,388 INFO L225 Difference]: With dead ends: 39 [2022-12-13 16:01:17,388 INFO L226 Difference]: Without dead ends: 20 [2022-12-13 16:01:17,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:01:17,392 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:01:17,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:01:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-13 16:01:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-12-13 16:01:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:17,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-12-13 16:01:17,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-12-13 16:01:17,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:01:17,416 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-12-13 16:01:17,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:17,416 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-12-13 16:01:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 16:01:17,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:01:17,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:01:17,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:01:17,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:01:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:01:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1959207727, now seen corresponding path program 1 times [2022-12-13 16:01:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:01:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136427799] [2022-12-13 16:01:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:17,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:01:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:01:17,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:01:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136427799] [2022-12-13 16:01:17,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136427799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:01:17,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995626379] [2022-12-13 16:01:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:17,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:17,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:01:17,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:01:17,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:01:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:17,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:01:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:01:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:01:17,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:01:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:01:17,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995626379] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:01:17,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:01:17,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 16:01:17,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102921957] [2022-12-13 16:01:17,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:01:17,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:01:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:01:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:01:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:01:17,612 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:17,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:01:17,665 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-12-13 16:01:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:01:17,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 16:01:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:01:17,666 INFO L225 Difference]: With dead ends: 44 [2022-12-13 16:01:17,666 INFO L226 Difference]: Without dead ends: 32 [2022-12-13 16:01:17,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:01:17,668 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:01:17,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:01:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-13 16:01:17,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-13 16:01:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-12-13 16:01:17,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 14 [2022-12-13 16:01:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:01:17,675 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-12-13 16:01:17,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-12-13 16:01:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 16:01:17,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:01:17,676 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:01:17,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:01:17,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:17,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:01:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:01:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1208394382, now seen corresponding path program 2 times [2022-12-13 16:01:17,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:01:17,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617990988] [2022-12-13 16:01:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:17,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:01:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 16:01:18,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:01:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617990988] [2022-12-13 16:01:18,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617990988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:01:18,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739866815] [2022-12-13 16:01:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:01:18,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:18,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:01:18,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:01:18,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:01:18,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:01:18,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:01:18,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:01:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:01:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 16:01:18,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:01:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 16:01:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739866815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:01:18,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:01:18,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 16:01:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740252957] [2022-12-13 16:01:18,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:01:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:01:18,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:01:18,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:01:18,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:01:18,245 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:01:18,336 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2022-12-13 16:01:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:01:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 16:01:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:01:18,337 INFO L225 Difference]: With dead ends: 83 [2022-12-13 16:01:18,338 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 16:01:18,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:01:18,340 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:01:18,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 47 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:01:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 16:01:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-12-13 16:01:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-12-13 16:01:18,350 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 29 [2022-12-13 16:01:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:01:18,350 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-12-13 16:01:18,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-12-13 16:01:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 16:01:18,353 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:01:18,353 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:01:18,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:01:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:18,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:01:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:01:18,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1285339298, now seen corresponding path program 3 times [2022-12-13 16:01:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:01:18,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845138903] [2022-12-13 16:01:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:01:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-13 16:01:18,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:01:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845138903] [2022-12-13 16:01:18,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845138903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:01:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998894092] [2022-12-13 16:01:18,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:01:18,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:18,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:01:18,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:01:18,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:01:19,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 16:01:19,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:01:19,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 16:01:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:01:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 16:01:19,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:01:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 16:01:19,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998894092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:01:19,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:01:19,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-12-13 16:01:19,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520426966] [2022-12-13 16:01:19,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:01:19,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 16:01:19,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:01:19,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 16:01:19,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:01:19,284 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:01:19,456 INFO L93 Difference]: Finished difference Result 161 states and 220 transitions. [2022-12-13 16:01:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:01:19,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-13 16:01:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:01:19,458 INFO L225 Difference]: With dead ends: 161 [2022-12-13 16:01:19,458 INFO L226 Difference]: Without dead ends: 122 [2022-12-13 16:01:19,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-13 16:01:19,459 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:01:19,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 83 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:01:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-13 16:01:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-12-13 16:01:19,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2066115702479339) internal successors, (146), 121 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-12-13 16:01:19,469 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 59 [2022-12-13 16:01:19,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:01:19,469 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-12-13 16:01:19,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-12-13 16:01:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-12-13 16:01:19,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:01:19,473 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:01:19,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:01:19,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:19,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:01:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:01:19,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1971297078, now seen corresponding path program 4 times [2022-12-13 16:01:19,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:01:19,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745678372] [2022-12-13 16:01:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:19,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:01:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-12-13 16:01:20,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:01:20,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745678372] [2022-12-13 16:01:20,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745678372] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:01:20,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246465797] [2022-12-13 16:01:20,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:01:20,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:20,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:01:20,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:01:20,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:01:20,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:01:20,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:01:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 16:01:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:01:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-12-13 16:01:20,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:01:21,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-12-13 16:01:21,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246465797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:01:21,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:01:21,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-12-13 16:01:21,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221387565] [2022-12-13 16:01:21,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:01:21,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 16:01:21,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:01:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 16:01:21,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 16:01:21,073 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:01:21,475 INFO L93 Difference]: Finished difference Result 317 states and 436 transitions. [2022-12-13 16:01:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 16:01:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2022-12-13 16:01:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:01:21,477 INFO L225 Difference]: With dead ends: 317 [2022-12-13 16:01:21,477 INFO L226 Difference]: Without dead ends: 242 [2022-12-13 16:01:21,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 16:01:21,478 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 467 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:01:21,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 75 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:01:21,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-12-13 16:01:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-12-13 16:01:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 290 transitions. [2022-12-13 16:01:21,497 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 290 transitions. Word has length 119 [2022-12-13 16:01:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:01:21,497 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 290 transitions. [2022-12-13 16:01:21,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:01:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 290 transitions. [2022-12-13 16:01:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-12-13 16:01:21,501 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:01:21,501 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:01:21,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:01:21,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:21,703 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:01:21,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:01:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1676624614, now seen corresponding path program 5 times [2022-12-13 16:01:21,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:01:21,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337331087] [2022-12-13 16:01:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:01:21,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:01:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:01:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-12-13 16:01:23,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:01:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337331087] [2022-12-13 16:01:23,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337331087] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:01:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940455255] [2022-12-13 16:01:23,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:01:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:01:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:01:23,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:01:23,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:02:59,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-12-13 16:02:59,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:02:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 16:02:59,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:03:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-12-13 16:03:00,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:03:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-12-13 16:03:01,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940455255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:03:01,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:03:01,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-12-13 16:03:01,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250531053] [2022-12-13 16:03:01,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:03:01,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-13 16:03:01,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:03:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-13 16:03:01,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 16:03:01,722 INFO L87 Difference]: Start difference. First operand 242 states and 290 transitions. Second operand has 97 states, 97 states have (on average 4.0) internal successors, (388), 97 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:03:02,858 INFO L93 Difference]: Finished difference Result 629 states and 868 transitions. [2022-12-13 16:03:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 16:03:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.0) internal successors, (388), 97 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-12-13 16:03:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:03:02,860 INFO L225 Difference]: With dead ends: 629 [2022-12-13 16:03:02,860 INFO L226 Difference]: Without dead ends: 482 [2022-12-13 16:03:02,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-12-13 16:03:02,862 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 624 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 16:03:02,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 138 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 16:03:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-12-13 16:03:02,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2022-12-13 16:03:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.2016632016632016) internal successors, (578), 481 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 578 transitions. [2022-12-13 16:03:02,877 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 578 transitions. Word has length 239 [2022-12-13 16:03:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:03:02,877 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 578 transitions. [2022-12-13 16:03:02,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.0) internal successors, (388), 97 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:03:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 578 transitions. [2022-12-13 16:03:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2022-12-13 16:03:02,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:03:02,883 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:03:02,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:03:03,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:03,085 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:03:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:03:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash 833449402, now seen corresponding path program 6 times [2022-12-13 16:03:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:03:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531191015] [2022-12-13 16:03:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:03:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:03:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:03:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-12-13 16:03:08,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:03:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531191015] [2022-12-13 16:03:08,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531191015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:03:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504404286] [2022-12-13 16:03:08,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:03:08,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:03:08,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:03:08,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:03:08,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd1d3521-220c-4e79-9e7b-8fba22bec844/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process