./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/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_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/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_920882f6-a428-4dbb-b801-f7c473a66ce6/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 89c26eeb2471ea361dc7d29b089a771d019574a0d594170c0c8f43bdd67825ef --- 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 17:47:34,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:47:34,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:47:34,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:47:34,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:47:34,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:47:34,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:47:34,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:47:34,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:47:34,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:47:34,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:47:34,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:47:34,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:47:34,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:47:34,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:47:34,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:47:34,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:47:34,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:47:34,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:47:34,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:47:34,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:47:34,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:47:34,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:47:34,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:47:34,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:47:34,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:47:34,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:47:34,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:47:34,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:47:34,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:47:34,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:47:34,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:47:34,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:47:34,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:47:34,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:47:34,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:47:34,223 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:47:34,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:47:34,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:47:34,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:47:34,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:47:34,227 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:47:34,249 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:47:34,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:47:34,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:47:34,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:47:34,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:47:34,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:47:34,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:47:34,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:47:34,265 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:47:34,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:47:34,265 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:47:34,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:47:34,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:47:34,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:47:34,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:47:34,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:47:34,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:47:34,267 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:47:34,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:47:34,268 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:47:34,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:47:34,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:47:34,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:47:34,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:47:34,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:47:34,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:47:34,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:47:34,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:47:34,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:47:34,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:47:34,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:47:34,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:47:34,271 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:47:34,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:47:34,271 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_920882f6-a428-4dbb-b801-f7c473a66ce6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89c26eeb2471ea361dc7d29b089a771d019574a0d594170c0c8f43bdd67825ef [2022-11-25 17:47:34,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:47:34,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:47:34,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:47:34,613 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:47:34,614 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:47:34,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound1.c [2022-11-25 17:47:37,699 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:47:37,957 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:47:37,958 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound1.c [2022-11-25 17:47:37,965 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/data/afe8c6f72/71e542d100d941bd81d2de67fb61448b/FLAG84aecaf5a [2022-11-25 17:47:37,979 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/data/afe8c6f72/71e542d100d941bd81d2de67fb61448b [2022-11-25 17:47:37,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:47:37,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:47:37,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:47:37,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:47:37,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:47:37,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:47:37" (1/1) ... [2022-11-25 17:47:37,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a81d403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:37, skipping insertion in model container [2022-11-25 17:47:37,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:47:37" (1/1) ... [2022-11-25 17:47:38,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:47:38,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:47:38,231 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_920882f6-a428-4dbb-b801-f7c473a66ce6/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound1.c[552,565] [2022-11-25 17:47:38,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:47:38,299 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:47:38,319 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_920882f6-a428-4dbb-b801-f7c473a66ce6/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound1.c[552,565] [2022-11-25 17:47:38,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:47:38,362 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:47:38,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38 WrapperNode [2022-11-25 17:47:38,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:47:38,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:47:38,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:47:38,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:47:38,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,412 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-25 17:47:38,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:47:38,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:47:38,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:47:38,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:47:38,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,451 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:47:38,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:47:38,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:47:38,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:47:38,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (1/1) ... [2022-11-25 17:47:38,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:47:38,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:38,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:47:38,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:47:38,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:47:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 17:47:38,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 17:47:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:47:38,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:47:38,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:47:38,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:47:38,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:47:38,623 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:47:38,627 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:47:38,918 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:47:38,925 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:47:38,925 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:47:38,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:47:38 BoogieIcfgContainer [2022-11-25 17:47:38,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:47:38,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:47:38,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:47:38,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:47:38,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:47:37" (1/3) ... [2022-11-25 17:47:38,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3532f299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:47:38, skipping insertion in model container [2022-11-25 17:47:38,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:47:38" (2/3) ... [2022-11-25 17:47:38,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3532f299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:47:38, skipping insertion in model container [2022-11-25 17:47:38,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:47:38" (3/3) ... [2022-11-25 17:47:38,937 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound1.c [2022-11-25 17:47:38,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:47:38,956 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:47:39,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:47:39,015 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;@7d58ddb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:47:39,015 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:47:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 17:47:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 17:47:39,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:47:39,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:39,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:47:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1730809867, now seen corresponding path program 1 times [2022-11-25 17:47:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:39,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657127315] [2022-11-25 17:47:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:39,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:39,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:39,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657127315] [2022-11-25 17:47:39,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:47:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450862356] [2022-11-25 17:47:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:39,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:39,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:39,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:39,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:47:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:47:39,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:47:39,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:39,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450862356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:39,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:39,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:47:39,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245531668] [2022-11-25 17:47:39,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:39,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:47:39,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:47:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:47:39,372 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:47:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:47:39,410 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-11-25 17:47:39,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:47:39,416 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-11-25 17:47:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:47:39,423 INFO L225 Difference]: With dead ends: 67 [2022-11-25 17:47:39,424 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 17:47:39,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 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 17:47:39,431 INFO L413 NwaCegarLoop]: 47 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, 47 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 17:47:39,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:47:39,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 17:47:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 17:47:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:47:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2022-11-25 17:47:39,475 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 28 [2022-11-25 17:47:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:47:39,475 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2022-11-25 17:47:39,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:47:39,476 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2022-11-25 17:47:39,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:47:39,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:47:39,478 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:39,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:47:39,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 17:47:39,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:47:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1744809392, now seen corresponding path program 1 times [2022-11-25 17:47:39,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:39,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145837656] [2022-11-25 17:47:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:39,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:39,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:47:39,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035363786] [2022-11-25 17:47:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:39,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:39,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:39,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:47:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:39,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:47:39,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:47:40,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:40,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:40,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145837656] [2022-11-25 17:47:40,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:47:40,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035363786] [2022-11-25 17:47:40,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035363786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:40,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:40,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:47:40,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312075723] [2022-11-25 17:47:40,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:40,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:47:40,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:40,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:47:40,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:47:40,081 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:47:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:47:40,949 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2022-11-25 17:47:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:47:40,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-25 17:47:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:47:40,952 INFO L225 Difference]: With dead ends: 51 [2022-11-25 17:47:40,952 INFO L226 Difference]: Without dead ends: 49 [2022-11-25 17:47:40,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:47:40,954 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:47:40,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 141 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:47:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-25 17:47:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-11-25 17:47:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 32 states have internal predecessors, (44), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:47:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2022-11-25 17:47:40,990 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 29 [2022-11-25 17:47:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:47:40,991 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2022-11-25 17:47:40,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:47:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2022-11-25 17:47:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:47:40,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:47:40,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:41,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 17:47:41,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:41,193 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:47:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:41,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1746477688, now seen corresponding path program 1 times [2022-11-25 17:47:41,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:41,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600147250] [2022-11-25 17:47:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:41,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:41,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:47:41,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319142736] [2022-11-25 17:47:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:41,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:41,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:41,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:47:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:41,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:47:41,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:47:41,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:47:41,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:41,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600147250] [2022-11-25 17:47:41,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:47:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319142736] [2022-11-25 17:47:41,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319142736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:47:41,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:47:41,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:47:41,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294996838] [2022-11-25 17:47:41,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:47:41,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:47:41,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:41,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:47:41,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:47:41,360 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:47:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:47:41,405 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-11-25 17:47:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:47:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-25 17:47:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:47:41,410 INFO L225 Difference]: With dead ends: 57 [2022-11-25 17:47:41,411 INFO L226 Difference]: Without dead ends: 49 [2022-11-25 17:47:41,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 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 17:47:41,412 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:47:41,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:47:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-25 17:47:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-25 17:47:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.393939393939394) internal successors, (46), 34 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:47:41,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2022-11-25 17:47:41,440 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 29 [2022-11-25 17:47:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:47:41,441 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2022-11-25 17:47:41,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:47:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2022-11-25 17:47:41,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 17:47:41,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:47:41,445 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:41,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:47:41,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:41,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:47:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1754973556, now seen corresponding path program 1 times [2022-11-25 17:47:41,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:41,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965876616] [2022-11-25 17:47:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:41,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:41,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:47:41,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996560624] [2022-11-25 17:47:41,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:41,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:41,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:41,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_920882f6-a428-4dbb-b801-f7c473a66ce6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process