./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R --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 ebfcdae9f2d92c4e39230ecf30ad4ac0897188e9aff6dcbde95509d87ea826ad --- 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-38b53e6 [2022-11-25 18:02:09,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:02:09,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:02:09,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:02:09,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:02:09,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:02:09,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:02:09,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:02:09,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:02:09,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:02:09,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:02:09,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:02:09,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:02:09,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:02:09,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:02:09,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:02:09,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:02:09,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:02:09,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:02:09,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:02:09,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:02:09,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:02:09,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:02:09,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:02:09,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:02:09,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:02:09,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:02:09,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:02:09,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:02:09,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:02:09,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:02:09,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:02:09,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:02:09,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:02:09,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:02:09,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:02:09,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:02:09,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:02:09,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:02:09,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:02:09,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:02:09,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:02:09,308 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:02:09,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:02:09,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:02:09,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:02:09,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:02:09,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:02:09,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:02:09,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:02:09,313 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:02:09,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:02:09,314 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:02:09,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:02:09,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:02:09,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:02:09,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:02:09,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:02:09,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:02:09,317 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:02:09,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:02:09,317 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:02:09,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:02:09,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:02:09,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:02:09,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:02:09,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:02:09,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:02:09,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:02:09,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:02:09,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:02:09,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:02:09,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:02:09,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:02:09,322 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:02:09,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:02:09,323 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_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebfcdae9f2d92c4e39230ecf30ad4ac0897188e9aff6dcbde95509d87ea826ad [2022-11-25 18:02:09,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:02:09,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:02:09,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:02:09,747 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:02:09,748 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:02:09,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c [2022-11-25 18:02:13,046 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:02:13,229 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:02:13,230 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c [2022-11-25 18:02:13,237 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/data/b7bc35f72/f86266c0b1b3450884ee62df61d136f1/FLAGf5e5f2de9 [2022-11-25 18:02:13,253 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/data/b7bc35f72/f86266c0b1b3450884ee62df61d136f1 [2022-11-25 18:02:13,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:02:13,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:02:13,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:02:13,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:02:13,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:02:13,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f730417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13, skipping insertion in model container [2022-11-25 18:02:13,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:02:13,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:02:13,456 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_f19b29a6-cddb-451a-a367-560bd1a9b703/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c[458,471] [2022-11-25 18:02:13,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:02:13,492 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:02:13,513 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_f19b29a6-cddb-451a-a367-560bd1a9b703/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound10.c[458,471] [2022-11-25 18:02:13,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:02:13,549 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:02:13,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13 WrapperNode [2022-11-25 18:02:13,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:02:13,552 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:02:13,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:02:13,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:02:13,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,623 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-11-25 18:02:13,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:02:13,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:02:13,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:02:13,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:02:13,633 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,642 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:02:13,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:02:13,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:02:13,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:02:13,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (1/1) ... [2022-11-25 18:02:13,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:02:13,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:13,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:02:13,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:02:13,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:02:13,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:02:13,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:02:13,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:02:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 18:02:13,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 18:02:13,790 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:02:13,792 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:02:13,925 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:02:13,931 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:02:13,931 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 18:02:13,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:13 BoogieIcfgContainer [2022-11-25 18:02:13,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:02:13,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:02:13,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:02:13,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:02:13,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:02:13" (1/3) ... [2022-11-25 18:02:13,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfdb312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:13, skipping insertion in model container [2022-11-25 18:02:13,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:13" (2/3) ... [2022-11-25 18:02:13,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bfdb312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:13, skipping insertion in model container [2022-11-25 18:02:13,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:13" (3/3) ... [2022-11-25 18:02:13,945 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound10.c [2022-11-25 18:02:13,989 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:02:13,989 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:02:14,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:02:14,059 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;@7007316, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:02:14,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 18:02:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2022-11-25 18:02:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 18:02:14,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:14,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:14,081 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:14,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2022-11-25 18:02:14,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:14,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159924583] [2022-11-25 18:02:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:14,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159924583] [2022-11-25 18:02:14,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 18:02:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033741672] [2022-11-25 18:02:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:14,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:14,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:02:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:14,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 18:02:14,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:14,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:14,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033741672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:14,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:14,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:02:14,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204605198] [2022-11-25 18:02:14,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:14,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:02:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:14,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:02:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:02:14,565 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:14,591 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-11-25 18:02:14,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:02:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 18:02:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:14,604 INFO L225 Difference]: With dead ends: 37 [2022-11-25 18:02:14,605 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 18:02:14,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:02:14,614 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:14,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:02:14,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 18:02:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 18:02:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:02:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-25 18:02:14,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-11-25 18:02:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:14,661 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-25 18:02:14,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-25 18:02:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 18:02:14,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:14,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:14,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:14,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 18:02:14,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2022-11-25 18:02:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:14,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690658081] [2022-11-25 18:02:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:14,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:14,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690658081] [2022-11-25 18:02:14,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 18:02:14,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697705278] [2022-11-25 18:02:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:14,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:14,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:14,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:14,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:02:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:02:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:15,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:15,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697705278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:15,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:15,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:02:15,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979846288] [2022-11-25 18:02:15,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:15,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:02:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:15,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:02:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:15,124 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:15,161 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-25 18:02:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:02:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 18:02:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:15,163 INFO L225 Difference]: With dead ends: 26 [2022-11-25 18:02:15,163 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 18:02:15,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:02:15,165 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:15,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:02:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 18:02:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 18:02:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:02:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-25 18:02:15,172 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2022-11-25 18:02:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:15,173 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-25 18:02:15,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-25 18:02:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 18:02:15,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:15,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:15,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:15,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 18:02:15,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:15,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2022-11-25 18:02:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:15,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63836403] [2022-11-25 18:02:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:15,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:02:15,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003448593] [2022-11-25 18:02:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:15,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:15,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:15,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:15,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:02:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 18:02:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:15,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:02:15,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:15,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63836403] [2022-11-25 18:02:15,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:02:15,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003448593] [2022-11-25 18:02:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003448593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:02:15,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:02:15,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:02:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939843311] [2022-11-25 18:02:15,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:15,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:02:15,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:15,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:02:15,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:02:15,592 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:15,914 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-25 18:02:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:02:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 18:02:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:15,915 INFO L225 Difference]: With dead ends: 28 [2022-11-25 18:02:15,915 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 18:02:15,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:02:15,917 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:15,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 18:02:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 18:02:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 18:02:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 18:02:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-25 18:02:15,927 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-11-25 18:02:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:15,928 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-25 18:02:15,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-25 18:02:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 18:02:15,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:15,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:15,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 18:02:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:16,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:16,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:16,132 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2022-11-25 18:02:16,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:16,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930924293] [2022-11-25 18:02:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:16,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:16,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:02:16,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362273573] [2022-11-25 18:02:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:16,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:16,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:16,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:16,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:02:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:02:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:16,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:16,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:16,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930924293] [2022-11-25 18:02:16,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:02:16,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362273573] [2022-11-25 18:02:16,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362273573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:16,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:16,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-25 18:02:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855767584] [2022-11-25 18:02:16,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:16,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:02:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:16,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:02:16,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:02:16,384 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:02:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:16,674 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-25 18:02:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:02:16,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-25 18:02:16,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:16,677 INFO L225 Difference]: With dead ends: 58 [2022-11-25 18:02:16,677 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 18:02:16,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:02:16,678 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:16,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 96 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 18:02:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 18:02:16,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-11-25 18:02:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 18:02:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-25 18:02:16,691 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2022-11-25 18:02:16,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:16,691 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-25 18:02:16,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:02:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-25 18:02:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 18:02:16,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:16,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:16,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 18:02:16,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:16,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:16,898 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2022-11-25 18:02:16,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:16,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365204686] [2022-11-25 18:02:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:16,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:16,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:02:16,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357852726] [2022-11-25 18:02:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:16,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:16,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:16,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:16,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:02:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:16,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:02:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:17,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:02:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:17,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365204686] [2022-11-25 18:02:17,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:02:17,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357852726] [2022-11-25 18:02:17,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357852726] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:17,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:02:17,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-25 18:02:17,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863221204] [2022-11-25 18:02:17,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:02:17,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:02:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:02:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:02:17,275 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:02:17,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:17,369 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-25 18:02:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:02:17,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-25 18:02:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:17,374 INFO L225 Difference]: With dead ends: 60 [2022-11-25 18:02:17,374 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 18:02:17,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:02:17,380 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:17,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:02:17,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 18:02:17,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-11-25 18:02:17,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 18:02:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-11-25 18:02:17,419 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2022-11-25 18:02:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:17,419 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-11-25 18:02:17,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:02:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-11-25 18:02:17,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 18:02:17,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:17,422 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:17,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:17,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:17,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:17,632 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2022-11-25 18:02:17,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:17,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218647729] [2022-11-25 18:02:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:17,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:17,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:02:17,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808243367] [2022-11-25 18:02:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:17,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:17,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:17,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:17,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:02:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:17,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:02:17,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 18:02:17,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:18,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:18,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218647729] [2022-11-25 18:02:18,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:02:18,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808243367] [2022-11-25 18:02:18,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808243367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:02:18,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:02:18,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-25 18:02:18,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190152647] [2022-11-25 18:02:18,448 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:18,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:02:18,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:02:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:02:18,449 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 18:02:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:18,685 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-11-25 18:02:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:02:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-11-25 18:02:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:18,687 INFO L225 Difference]: With dead ends: 51 [2022-11-25 18:02:18,687 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 18:02:18,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:02:18,689 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:18,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 79 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:02:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 18:02:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-25 18:02:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 18:02:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-25 18:02:18,729 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2022-11-25 18:02:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:18,729 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-25 18:02:18,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 18:02:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-25 18:02:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 18:02:18,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:18,732 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:18,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:18,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:18,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2022-11-25 18:02:18,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:18,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330734041] [2022-11-25 18:02:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:18,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:18,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:02:18,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149154215] [2022-11-25 18:02:18,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:18,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:18,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:18,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:18,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:02:19,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:19,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:02:19,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 18:02:19,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 18:02:19,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:19,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330734041] [2022-11-25 18:02:19,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:02:19,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149154215] [2022-11-25 18:02:19,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149154215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:19,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:19,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-25 18:02:19,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44846094] [2022-11-25 18:02:19,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:19,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:02:19,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:02:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:02:19,518 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:02:20,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:20,315 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-11-25 18:02:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:02:20,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37 [2022-11-25 18:02:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:20,316 INFO L225 Difference]: With dead ends: 62 [2022-11-25 18:02:20,316 INFO L226 Difference]: Without dead ends: 54 [2022-11-25 18:02:20,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:02:20,317 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:20,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 187 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 18:02:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-25 18:02:20,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-11-25 18:02:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 18:02:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-11-25 18:02:20,346 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2022-11-25 18:02:20,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:20,346 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-11-25 18:02:20,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:02:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-11-25 18:02:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 18:02:20,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:20,351 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:20,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:20,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:20,556 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2022-11-25 18:02:20,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:20,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794069434] [2022-11-25 18:02:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:20,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:20,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:02:20,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695951856] [2022-11-25 18:02:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:20,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:20,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:02:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:20,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:02:20,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:02:20,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 18:02:20,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794069434] [2022-11-25 18:02:20,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:02:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695951856] [2022-11-25 18:02:20,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695951856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:20,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:20,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-25 18:02:20,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60770310] [2022-11-25 18:02:20,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:20,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:02:20,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:20,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:02:20,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:02:20,912 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 18:02:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:21,180 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-11-25 18:02:21,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:02:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2022-11-25 18:02:21,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:21,182 INFO L225 Difference]: With dead ends: 126 [2022-11-25 18:02:21,182 INFO L226 Difference]: Without dead ends: 116 [2022-11-25 18:02:21,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:02:21,183 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 68 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:21,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 122 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:02:21,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-25 18:02:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2022-11-25 18:02:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 18:02:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-11-25 18:02:21,223 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 47 [2022-11-25 18:02:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:21,224 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-11-25 18:02:21,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 18:02:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-11-25 18:02:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 18:02:21,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:21,225 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:21,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:21,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 18:02:21,430 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:21,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 3 times [2022-11-25 18:02:21,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:21,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473197244] [2022-11-25 18:02:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:21,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:02:21,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262754705] [2022-11-25 18:02:21,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:02:21,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:21,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:21,446 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:21,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:02:21,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 18:02:21,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:02:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 18:02:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 18:02:22,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 18:02:22,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:02:22,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473197244] [2022-11-25 18:02:22,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:02:22,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262754705] [2022-11-25 18:02:22,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262754705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:02:22,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:02:22,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2022-11-25 18:02:22,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238829734] [2022-11-25 18:02:22,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:02:22,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:02:22,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:02:22,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:02:22,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:02:22,738 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 18:02:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:02:24,774 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2022-11-25 18:02:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:02:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 61 [2022-11-25 18:02:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:02:24,776 INFO L225 Difference]: With dead ends: 119 [2022-11-25 18:02:24,777 INFO L226 Difference]: Without dead ends: 108 [2022-11-25 18:02:24,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 18:02:24,778 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 108 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 18:02:24,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 290 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 18:02:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-25 18:02:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-11-25 18:02:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 18:02:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2022-11-25 18:02:24,855 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 61 [2022-11-25 18:02:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:02:24,855 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2022-11-25 18:02:24,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 18:02:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2022-11-25 18:02:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 18:02:24,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:02:24,863 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:24,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:25,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:25,069 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:02:25,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:25,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1956819211, now seen corresponding path program 2 times [2022-11-25 18:02:25,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:02:25,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139114038] [2022-11-25 18:02:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:02:25,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:02:25,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062632183] [2022-11-25 18:02:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:02:25,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:25,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:25,103 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:02:25,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:02:26,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:02:26,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-25 18:02:26,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:02:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:02:27,203 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:02:27,204 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:02:27,205 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 18:02:27,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:27,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:02:27,417 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2022-11-25 18:02:27,421 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:02:27,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:02:27 BoogieIcfgContainer [2022-11-25 18:02:27,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:02:27,484 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:02:27,484 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:02:27,484 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:02:27,486 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:13" (3/4) ... [2022-11-25 18:02:27,488 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-25 18:02:27,570 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 18:02:27,571 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:02:27,572 INFO L158 Benchmark]: Toolchain (without parser) took 14314.61ms. Allocated memory was 142.6MB in the beginning and 178.3MB in the end (delta: 35.7MB). Free memory was 99.0MB in the beginning and 113.1MB in the end (delta: -14.1MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2022-11-25 18:02:27,573 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 142.6MB. Free memory is still 117.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:02:27,573 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.77ms. Allocated memory is still 142.6MB. Free memory was 99.0MB in the beginning and 88.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:02:27,574 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.59ms. Allocated memory is still 142.6MB. Free memory was 88.0MB in the beginning and 86.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:02:27,574 INFO L158 Benchmark]: Boogie Preprocessor took 20.69ms. Allocated memory is still 142.6MB. Free memory was 86.9MB in the beginning and 85.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:02:27,574 INFO L158 Benchmark]: RCFGBuilder took 288.44ms. Allocated memory is still 142.6MB. Free memory was 85.4MB in the beginning and 74.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:02:27,575 INFO L158 Benchmark]: TraceAbstraction took 13547.01ms. Allocated memory was 142.6MB in the beginning and 178.3MB in the end (delta: 35.7MB). Free memory was 74.4MB in the beginning and 117.3MB in the end (delta: -42.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:02:27,576 INFO L158 Benchmark]: Witness Printer took 87.91ms. Allocated memory is still 178.3MB. Free memory was 117.3MB in the beginning and 113.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 18:02:27,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 142.6MB. Free memory is still 117.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.77ms. Allocated memory is still 142.6MB. Free memory was 99.0MB in the beginning and 88.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.59ms. Allocated memory is still 142.6MB. Free memory was 88.0MB in the beginning and 86.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.69ms. Allocated memory is still 142.6MB. Free memory was 86.9MB in the beginning and 85.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 288.44ms. Allocated memory is still 142.6MB. Free memory was 85.4MB in the beginning and 74.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 13547.01ms. Allocated memory was 142.6MB in the beginning and 178.3MB in the end (delta: 35.7MB). Free memory was 74.4MB in the beginning and 117.3MB in the end (delta: -42.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 87.91ms. Allocated memory is still 178.3MB. Free memory was 117.3MB in the beginning and 113.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) [L7] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [c=0, counter=0, k=11, x=0, y=0] [L28] EXPR counter++ VAL [c=0, counter=1, counter++=0, k=11, x=0, y=0] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=0, counter=1, k=11, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=1, counter=1, k=11, x=1, y=1] [L28] EXPR counter++ VAL [c=1, counter=2, counter++=1, k=11, x=1, y=1] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=1, counter=2, k=11, x=1, y=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=2, counter=2, k=11, x=33, y=2] [L28] EXPR counter++ VAL [c=2, counter=3, counter++=2, k=11, x=33, y=2] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=2, counter=3, k=11, x=33, y=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=3, counter=3, k=11, x=276, y=3] [L28] EXPR counter++ VAL [c=3, counter=4, counter++=3, k=11, x=276, y=3] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=3, counter=4, k=11, x=276, y=3] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=4, counter=4, k=11, x=1300, y=4] [L28] EXPR counter++ VAL [c=4, counter=5, counter++=4, k=11, x=1300, y=4] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=4, counter=5, k=11, x=1300, y=4] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=5, counter=5, k=11, x=4425, y=5] [L28] EXPR counter++ VAL [c=5, counter=6, counter++=5, k=11, x=4425, y=5] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=5, counter=6, k=11, x=4425, y=5] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=6, counter=6, k=11, x=12201, y=6] [L28] EXPR counter++ VAL [c=6, counter=7, counter++=6, k=11, x=12201, y=6] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=6, counter=7, k=11, x=12201, y=6] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=7, counter=7, k=11, x=29008, y=7] [L28] EXPR counter++ VAL [c=7, counter=8, counter++=7, k=11, x=29008, y=7] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=7, counter=8, k=11, x=29008, y=7] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=8, counter=8, k=11, x=61776, y=8] [L28] EXPR counter++ VAL [c=8, counter=9, counter++=8, k=11, x=61776, y=8] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=8, counter=9, k=11, x=61776, y=8] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=9, counter=9, k=11, x=120825, y=9] [L28] EXPR counter++ VAL [c=9, counter=10, counter++=9, k=11, x=120825, y=9] [L28] COND TRUE counter++<10 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=9, counter=10, k=11, x=120825, y=9] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [c=10, counter=10, k=11, x=220825, y=10] [L28] EXPR counter++ VAL [c=10, counter=11, counter++=10, k=11, x=220825, y=10] [L28] COND FALSE !(counter++<10) [L39] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, counter=11] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L39] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [c=10, counter=11, k=11, x=220825, y=10] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, counter=11] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.4s, OverallIterations: 10, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 293 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 290 mSDsluCounter, 938 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 722 mSDsCounter, 151 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 761 IncrementalHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 151 mSolverCounterUnsat, 216 mSDtfsCounter, 761 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 472 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=9, InterpolantAutomatonStates: 96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 9 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 353 NumberOfCodeBlocks, 353 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 406 ConstructedInterpolants, 0 QuantifiedInterpolants, 2385 SizeOfPredicates, 25 NumberOfNonLiveVariables, 842 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 364/608 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-25 18:02:27,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19b29a6-cddb-451a-a367-560bd1a9b703/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE