./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg05-1.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_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/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_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/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_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/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 02f02b7f59fc1c3b5c77751f648b2e92e85109b700d3d48af7999437b36b94ea --- 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 14:14:09,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:14:09,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:14:09,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:14:09,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:14:09,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:14:09,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:14:09,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:14:09,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:14:09,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:14:09,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:14:09,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:14:09,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:14:09,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:14:09,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:14:09,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:14:09,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:14:09,988 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:14:09,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:14:09,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:14:09,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:14:09,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:14:09,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:14:09,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:14:09,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:14:09,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:14:09,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:14:09,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:14:09,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:14:09,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:14:09,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:14:09,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:14:09,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:14:09,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:14:10,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:14:10,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:14:10,000 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:14:10,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:14:10,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:14:10,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:14:10,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:14:10,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:14:10,016 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:14:10,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:14:10,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:14:10,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:14:10,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:14:10,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:14:10,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:14:10,018 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:14:10,018 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:14:10,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:14:10,018 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:14:10,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:14:10,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:14:10,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:14:10,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:14:10,021 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:14:10,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:14:10,021 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:14:10,021 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_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02f02b7f59fc1c3b5c77751f648b2e92e85109b700d3d48af7999437b36b94ea [2022-12-13 14:14:10,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:14:10,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:14:10,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:14:10,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:14:10,209 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:14:10,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/reducercommutativity/avg05-1.i [2022-12-13 14:14:12,762 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:14:12,907 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:14:12,907 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/sv-benchmarks/c/reducercommutativity/avg05-1.i [2022-12-13 14:14:12,911 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/data/cfcfecae6/2f120e37714d4cd280975cd2a7018395/FLAG9933e01ef [2022-12-13 14:14:13,336 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/data/cfcfecae6/2f120e37714d4cd280975cd2a7018395 [2022-12-13 14:14:13,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:14:13,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:14:13,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:14:13,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:14:13,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:14:13,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b8f0c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13, skipping insertion in model container [2022-12-13 14:14:13,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:14:13,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:14:13,466 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_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/sv-benchmarks/c/reducercommutativity/avg05-1.i[1275,1288] [2022-12-13 14:14:13,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:14:13,475 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:14:13,488 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_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/sv-benchmarks/c/reducercommutativity/avg05-1.i[1275,1288] [2022-12-13 14:14:13,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:14:13,498 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:14:13,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13 WrapperNode [2022-12-13 14:14:13,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:14:13,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:14:13,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:14:13,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:14:13,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,522 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-13 14:14:13,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:14:13,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:14:13,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:14:13,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:14:13,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,537 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:14:13,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:14:13,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:14:13,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:14:13,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (1/1) ... [2022-12-13 14:14:13,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:14:13,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:13,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:14:13,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:14:13,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:14:13,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:14:13,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:14:13,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:14:13,590 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-12-13 14:14:13,590 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-12-13 14:14:13,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:14:13,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:14:13,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:14:13,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:14:13,646 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:14:13,647 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:14:13,754 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:14:13,758 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:14:13,758 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 14:14:13,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:14:13 BoogieIcfgContainer [2022-12-13 14:14:13,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:14:13,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:14:13,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:14:13,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:14:13,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:14:13" (1/3) ... [2022-12-13 14:14:13,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b63ab80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:14:13, skipping insertion in model container [2022-12-13 14:14:13,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:14:13" (2/3) ... [2022-12-13 14:14:13,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b63ab80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:14:13, skipping insertion in model container [2022-12-13 14:14:13,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:14:13" (3/3) ... [2022-12-13 14:14:13,766 INFO L112 eAbstractionObserver]: Analyzing ICFG avg05-1.i [2022-12-13 14:14:13,780 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:14:13,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:14:13,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:14:13,818 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;@6e9192e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:14:13,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 14:14:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:14:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 14:14:13,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:13,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:13,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:13,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:13,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-12-13 14:14:13,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:13,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617342915] [2022-12-13 14:14:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:13,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 14:14:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 14:14:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 14:14:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 14:14:14,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:14,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617342915] [2022-12-13 14:14:14,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617342915] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:14,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143380337] [2022-12-13 14:14:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:14,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:14,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:14,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:14,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:14:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:14:14,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 14:14:14,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:14:14,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143380337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:14,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:14:14,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 14:14:14,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868659238] [2022-12-13 14:14:14,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:14,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:14,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:14,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:14:14,234 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 14:14:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:14,257 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-12-13 14:14:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-12-13 14:14:14,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:14,266 INFO L225 Difference]: With dead ends: 50 [2022-12-13 14:14:14,267 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 14:14:14,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:14:14,272 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:14,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 14:14:14,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-12-13 14:14:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:14:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-13 14:14:14,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-12-13 14:14:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:14,303 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-13 14:14:14,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 14:14:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-13 14:14:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 14:14:14,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:14,305 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:14,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:14:14,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 14:14:14,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-12-13 14:14:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:14,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301594323] [2022-12-13 14:14:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:14,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 14:14:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 14:14:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 14:14:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 14:14:14,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:14,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301594323] [2022-12-13 14:14:14,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301594323] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191811937] [2022-12-13 14:14:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:14,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:14,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:14,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:14,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:14:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:14:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 14:14:14,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:14:14,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191811937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:14,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:14:14,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-13 14:14:14,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632394438] [2022-12-13 14:14:14,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:14,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:14,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:14,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:14,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:14:14,778 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:14:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:14,787 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-12-13 14:14:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:14,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-12-13 14:14:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:14,788 INFO L225 Difference]: With dead ends: 42 [2022-12-13 14:14:14,788 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 14:14:14,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:14:14,789 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:14,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 14:14:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-12-13 14:14:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:14:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-12-13 14:14:14,793 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-12-13 14:14:14,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:14,793 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-12-13 14:14:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:14:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-12-13 14:14:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 14:14:14,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:14,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:14,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:14:14,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:14,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2022-12-13 14:14:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:14,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830412836] [2022-12-13 14:14:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:15,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 14:14:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 14:14:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 14:14:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 14:14:15,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:15,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830412836] [2022-12-13 14:14:15,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830412836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:15,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686918101] [2022-12-13 14:14:15,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:15,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:15,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:15,206 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:15,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:14:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 14:14:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 14:14:15,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:14:15,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686918101] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:14:15,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:14:15,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-13 14:14:15,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818460532] [2022-12-13 14:14:15,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:14:15,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:14:15,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:15,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:14:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:14:15,279 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:14:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:15,289 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-12-13 14:14:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:14:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-12-13 14:14:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:15,291 INFO L225 Difference]: With dead ends: 39 [2022-12-13 14:14:15,291 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 14:14:15,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:14:15,292 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:15,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 14:14:15,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-12-13 14:14:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:14:15,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-13 14:14:15,302 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-12-13 14:14:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:15,304 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-13 14:14:15,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:14:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-13 14:14:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 14:14:15,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:15,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:15,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:14:15,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:15,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2022-12-13 14:14:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:15,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291015448] [2022-12-13 14:14:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 14:14:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-12-13 14:14:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-12-13 14:14:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 14:14:15,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291015448] [2022-12-13 14:14:15,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291015448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978694217] [2022-12-13 14:14:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:15,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:15,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:15,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:15,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:14:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:15,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 14:14:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 14:14:15,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:14:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 14:14:15,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978694217] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:14:15,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:14:15,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-12-13 14:14:15,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059717582] [2022-12-13 14:14:15,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:14:15,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:14:15,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:15,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:14:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:14:15,861 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 14:14:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:15,898 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-12-13 14:14:15,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:14:15,899 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-12-13 14:14:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:15,899 INFO L225 Difference]: With dead ends: 54 [2022-12-13 14:14:15,899 INFO L226 Difference]: Without dead ends: 34 [2022-12-13 14:14:15,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:14:15,900 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:15,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-13 14:14:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-12-13 14:14:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:14:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-12-13 14:14:15,904 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-12-13 14:14:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:15,904 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-12-13 14:14:15,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 14:14:15,905 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-12-13 14:14:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 14:14:15,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:15,905 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:15,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:14:16,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:16,106 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2022-12-13 14:14:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:16,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447195913] [2022-12-13 14:14:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:16,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:16,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 14:14:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 14:14:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:16,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 14:14:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 14:14:16,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447195913] [2022-12-13 14:14:16,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447195913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290262757] [2022-12-13 14:14:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:14:16,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:16,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:16,188 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:16,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:14:16,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:14:16,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:14:16,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:14:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 14:14:16,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:14:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 14:14:16,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290262757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:14:16,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:14:16,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2022-12-13 14:14:16,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133923121] [2022-12-13 14:14:16,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:14:16,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:14:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:16,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:14:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:14:16,347 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 14:14:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:16,379 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2022-12-13 14:14:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:14:16,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-12-13 14:14:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:16,380 INFO L225 Difference]: With dead ends: 60 [2022-12-13 14:14:16,380 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 14:14:16,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:14:16,381 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:16,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 14:14:16,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-12-13 14:14:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:14:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-13 14:14:16,385 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 50 [2022-12-13 14:14:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:16,385 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-13 14:14:16,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 14:14:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-13 14:14:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 14:14:16,386 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:16,386 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:16,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 14:14:16,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:16,587 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1889542979, now seen corresponding path program 3 times [2022-12-13 14:14:16,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:16,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848543288] [2022-12-13 14:14:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:16,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:16,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 14:14:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:16,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 14:14:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:16,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 14:14:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 14:14:16,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848543288] [2022-12-13 14:14:16,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848543288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971732200] [2022-12-13 14:14:16,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:14:16,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:16,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:16,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:16,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:14:16,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:14:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:14:16,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:14:16,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 14:14:16,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:14:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 14:14:16,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971732200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:14:16,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:14:16,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-12-13 14:14:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159463355] [2022-12-13 14:14:16,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:14:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:14:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:14:16,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:14:16,850 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 14:14:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:16,869 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-12-13 14:14:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:14:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-12-13 14:14:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:16,870 INFO L225 Difference]: With dead ends: 66 [2022-12-13 14:14:16,870 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 14:14:16,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:14:16,871 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:16,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 14:14:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-13 14:14:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:14:16,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-12-13 14:14:16,876 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 54 [2022-12-13 14:14:16,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:16,876 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-12-13 14:14:16,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 14:14:16,876 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-12-13 14:14:16,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 14:14:16,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:16,877 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:16,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:14:17,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:17,080 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2086234039, now seen corresponding path program 4 times [2022-12-13 14:14:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:17,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095749824] [2022-12-13 14:14:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:17,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:17,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 14:14:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:17,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 14:14:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:17,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 14:14:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-12-13 14:14:17,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095749824] [2022-12-13 14:14:17,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095749824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:17,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83018078] [2022-12-13 14:14:17,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:14:17,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:17,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:17,279 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:17,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:14:17,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:14:17,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:14:17,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:14:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 130 proven. 4 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-13 14:14:17,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:14:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-12-13 14:14:17,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83018078] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:14:17,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:14:17,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-12-13 14:14:17,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234771937] [2022-12-13 14:14:17,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:14:17,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:14:17,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:14:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:14:17,405 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 14:14:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:14:17,424 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-12-13 14:14:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:14:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2022-12-13 14:14:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:14:17,426 INFO L225 Difference]: With dead ends: 68 [2022-12-13 14:14:17,426 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 14:14:17,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:14:17,427 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:14:17,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:14:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 14:14:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-13 14:14:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 14:14:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-12-13 14:14:17,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 72 [2022-12-13 14:14:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:14:17,434 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-12-13 14:14:17,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 14:14:17,434 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-12-13 14:14:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-13 14:14:17,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:14:17,435 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:17,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:14:17,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:17,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 14:14:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:17,637 INFO L85 PathProgramCache]: Analyzing trace with hash 319930483, now seen corresponding path program 5 times [2022-12-13 14:14:17,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:17,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698306437] [2022-12-13 14:14:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:17,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:10,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 14:15:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:12,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 14:15:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:15,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-12-13 14:15:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 292 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 14:15:21,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:15:21,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698306437] [2022-12-13 14:15:21,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698306437] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:15:21,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552987113] [2022-12-13 14:15:21,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:15:21,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:15:21,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:15:21,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:15:21,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b10f83-7d06-4d21-87d3-80d2a3e7b1a5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:15:21,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-12-13 14:15:21,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:15:21,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 179 conjunts are in the unsatisfiable core [2022-12-13 14:15:21,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:15:21,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:15:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:21,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 14:15:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:15:22,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-12-13 14:15:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:15:22,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 55 [2022-12-13 14:15:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:22,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:15:22,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 64 [2022-12-13 14:15:28,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:15:56,812 WARN L233 SmtUtils]: Spent 28.41s on a formula simplification. DAG size of input: 1298 DAG size of output: 460 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 14:15:56,814 INFO L321 Elim1Store]: treesize reduction 4709, result has 25.1 percent of original size [2022-12-13 14:15:56,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 30 select indices, 30 select index equivalence classes, 10 disjoint index pairs (out of 435 index pairs), introduced 30 new quantified variables, introduced 460 case distinctions, treesize of input 1014 treesize of output 1875