./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/prodbin-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/prodbin-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL --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 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:05:23,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:05:23,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:05:23,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:05:23,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:05:23,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:05:23,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:05:23,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:05:23,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:05:23,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:05:23,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:05:23,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:05:23,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:05:23,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:05:23,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:05:23,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:05:23,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:05:23,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:05:23,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:05:23,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:05:23,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:05:23,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:05:23,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:05:23,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:05:23,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:05:23,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:05:23,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:05:23,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:05:23,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:05:23,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:05:23,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:05:23,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:05:23,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:05:23,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:05:23,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:05:23,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:05:23,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:05:23,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:05:23,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:05:23,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:05:23,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:05:23,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:05:23,309 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:05:23,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:05:23,310 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:05:23,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:05:23,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:05:23,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:05:23,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:05:23,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:05:23,312 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:05:23,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:05:23,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:05:23,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:05:23,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:05:23,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:05:23,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:05:23,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:05:23,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:05:23,314 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:05:23,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:05:23,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:05:23,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:05:23,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:05:23,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:05:23,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:05:23,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:05:23,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:05:23,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:05:23,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:05:23,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:05:23,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:05:23,317 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:05:23,317 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:05:23,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:05:23,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:05:23,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77bbfba272f7904e5efe099569a5ed86d54de3fd07a8ce9d48301467c5048e30 [2021-11-19 05:05:23,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:05:23,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:05:23,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:05:23,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:05:23,682 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:05:23,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/nla-digbench/prodbin-ll.c [2021-11-19 05:05:23,767 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/data/53d69fb33/5c9cdeb1e61b418cb894e5d780b56f59/FLAG7c3930d1c [2021-11-19 05:05:24,392 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:05:24,393 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/sv-benchmarks/c/nla-digbench/prodbin-ll.c [2021-11-19 05:05:24,408 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/data/53d69fb33/5c9cdeb1e61b418cb894e5d780b56f59/FLAG7c3930d1c [2021-11-19 05:05:24,767 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/data/53d69fb33/5c9cdeb1e61b418cb894e5d780b56f59 [2021-11-19 05:05:24,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:05:24,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:05:24,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:05:24,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:05:24,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:05:24,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:24" (1/1) ... [2021-11-19 05:05:24,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d0516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:24, skipping insertion in model container [2021-11-19 05:05:24,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:24" (1/1) ... [2021-11-19 05:05:24,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:05:24,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:05:25,039 WARN L230 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_5e2bc751-a9de-4571-9534-dde6777a8797/sv-benchmarks/c/nla-digbench/prodbin-ll.c[537,550] [2021-11-19 05:05:25,058 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:05:25,068 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:05:25,086 WARN L230 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_5e2bc751-a9de-4571-9534-dde6777a8797/sv-benchmarks/c/nla-digbench/prodbin-ll.c[537,550] [2021-11-19 05:05:25,102 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:05:25,124 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:05:25,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25 WrapperNode [2021-11-19 05:05:25,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:05:25,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:05:25,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:05:25,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:05:25,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,167 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-11-19 05:05:25,168 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:05:25,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:05:25,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:05:25,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:05:25,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:05:25,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:05:25,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:05:25,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:05:25,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (1/1) ... [2021-11-19 05:05:25,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:05:25,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:25,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:05:25,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:05:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:05:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:05:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:05:25,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:05:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 05:05:25,324 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 05:05:25,401 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:05:25,404 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:05:25,580 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:05:25,602 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:05:25,602 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:05:25,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:25 BoogieIcfgContainer [2021-11-19 05:05:25,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:05:25,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:05:25,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:05:25,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:05:25,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:05:24" (1/3) ... [2021-11-19 05:05:25,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e92f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:25, skipping insertion in model container [2021-11-19 05:05:25,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:25" (2/3) ... [2021-11-19 05:05:25,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e92f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:25, skipping insertion in model container [2021-11-19 05:05:25,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:25" (3/3) ... [2021-11-19 05:05:25,629 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.c [2021-11-19 05:05:25,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:05:25,636 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:05:25,709 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:05:25,718 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:05:25,718 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:05:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:05:25,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:05:25,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:25,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:25,745 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:05:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -589251586, now seen corresponding path program 1 times [2021-11-19 05:05:25,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:25,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343344698] [2021-11-19 05:05:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:25,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:25,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:25,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343344698] [2021-11-19 05:05:25,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343344698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:25,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:25,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 05:05:25,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957381412] [2021-11-19 05:05:25,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:25,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 05:05:25,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 05:05:26,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:05:26,029 INFO L87 Difference]: Start difference. First operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2021-11-19 05:05:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:26,059 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-11-19 05:05:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 05:05:26,063 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 [2021-11-19 05:05:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:26,073 INFO L225 Difference]: With dead ends: 37 [2021-11-19 05:05:26,073 INFO L226 Difference]: Without dead ends: 16 [2021-11-19 05:05:26,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 05:05:26,085 INFO L933 BasicCegarLoop]: 22 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, 22 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 [2021-11-19 05:05:26,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:05:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-19 05:05:26,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-19 05:05:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-19 05:05:26,152 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-11-19 05:05:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:26,153 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-19 05:05:26,154 INFO L471 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) [2021-11-19 05:05:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-19 05:05:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 05:05:26,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:26,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:26,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:05:26,157 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:05:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1187543236, now seen corresponding path program 1 times [2021-11-19 05:05:26,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:26,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169634001] [2021-11-19 05:05:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:26,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:26,207 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:05:26,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388602688] [2021-11-19 05:05:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:26,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:26,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:26,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:26,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:05:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:05:26,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:26,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:05:26,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:26,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169634001] [2021-11-19 05:05:26,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:05:26,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388602688] [2021-11-19 05:05:26,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388602688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:26,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:26,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:05:26,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026798410] [2021-11-19 05:05:26,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:26,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:05:26,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:05:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:05:26,490 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-11-19 05:05:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:26,565 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-19 05:05:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:05:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2021-11-19 05:05:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:26,567 INFO L225 Difference]: With dead ends: 28 [2021-11-19 05:05:26,567 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 05:05:26,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:05:26,570 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:26,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:05:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 05:05:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-11-19 05:05:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:05:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-19 05:05:26,579 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2021-11-19 05:05:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:26,579 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-19 05:05:26,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-11-19 05:05:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-19 05:05:26,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 05:05:26,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:26,581 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:26,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:26,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-19 05:05:26,799 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:05:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash -423389445, now seen corresponding path program 1 times [2021-11-19 05:05:26,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:26,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683746239] [2021-11-19 05:05:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:26,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:26,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:05:26,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386533977] [2021-11-19 05:05:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:26,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:26,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:26,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:26,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:05:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:05:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:27,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:05:27,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:27,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683746239] [2021-11-19 05:05:27,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:05:27,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386533977] [2021-11-19 05:05:27,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386533977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:05:27,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:05:27,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:05:27,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556181707] [2021-11-19 05:05:27,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:05:27,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:05:27,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:27,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:05:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:05:27,066 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 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) [2021-11-19 05:05:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:27,217 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-19 05:05:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:05:27,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 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 15 [2021-11-19 05:05:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:27,221 INFO L225 Difference]: With dead ends: 32 [2021-11-19 05:05:27,221 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 05:05:27,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:05:27,227 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:27,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:05:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 05:05:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-11-19 05:05:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:05:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-11-19 05:05:27,250 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-11-19 05:05:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:27,251 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-11-19 05:05:27,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 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) [2021-11-19 05:05:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-11-19 05:05:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 05:05:27,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:27,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:27,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:27,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:27,480 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:05:27,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1566145315, now seen corresponding path program 1 times [2021-11-19 05:05:27,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:27,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605225454] [2021-11-19 05:05:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:27,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:27,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:05:27,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533044535] [2021-11-19 05:05:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:27,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:27,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:27,494 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:27,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:05:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:27,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 05:05:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:28,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:31,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:31,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605225454] [2021-11-19 05:05:31,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:05:31,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533044535] [2021-11-19 05:05:31,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533044535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:31,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:05:31,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-11-19 05:05:31,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545444236] [2021-11-19 05:05:31,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:31,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:05:31,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:31,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:05:31,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:05:31,230 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:05:33,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:05:35,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:05:37,863 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:05:41,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:05:43,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:05:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:43,525 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-11-19 05:05:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:05:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-19 05:05:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:43,529 INFO L225 Difference]: With dead ends: 41 [2021-11-19 05:05:43,529 INFO L226 Difference]: Without dead ends: 39 [2021-11-19 05:05:43,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:05:43,531 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:43,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 67 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 4 Unknown, 0 Unchecked, 11.5s Time] [2021-11-19 05:05:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-19 05:05:43,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-11-19 05:05:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:05:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-19 05:05:43,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2021-11-19 05:05:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:43,547 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-19 05:05:43,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:05:43,547 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-19 05:05:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 05:05:43,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:43,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:43,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-19 05:05:43,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:43,768 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:05:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash 208862047, now seen corresponding path program 1 times [2021-11-19 05:05:43,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:43,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749017166] [2021-11-19 05:05:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:43,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:43,782 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:05:43,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134505608] [2021-11-19 05:05:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:43,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:43,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:43,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:43,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:05:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:05:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:47,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:05:48,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:48,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749017166] [2021-11-19 05:05:48,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:05:48,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134505608] [2021-11-19 05:05:48,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134505608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:48,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:05:48,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-11-19 05:05:48,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601049543] [2021-11-19 05:05:48,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:48,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 05:05:48,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:48,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 05:05:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-19 05:05:48,819 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:05:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:50,091 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-11-19 05:05:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:05:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-19 05:05:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:50,094 INFO L225 Difference]: With dead ends: 55 [2021-11-19 05:05:50,095 INFO L226 Difference]: Without dead ends: 48 [2021-11-19 05:05:50,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-11-19 05:05:50,097 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:50,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 78 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 05:05:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-19 05:05:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-19 05:05:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:05:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-19 05:05:50,109 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2021-11-19 05:05:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:50,110 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-19 05:05:50,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 17 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:05:50,110 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-19 05:05:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-19 05:05:50,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:50,113 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:50,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:50,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:50,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:05:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:50,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1499753556, now seen corresponding path program 1 times [2021-11-19 05:05:50,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:50,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596187348] [2021-11-19 05:05:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:50,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:50,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:05:50,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39219563] [2021-11-19 05:05:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:50,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:50,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:50,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:50,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:05:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:50,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:05:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:05:50,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:05:50,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:50,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596187348] [2021-11-19 05:05:50,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:05:50,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39219563] [2021-11-19 05:05:50,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39219563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:50,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:05:50,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-19 05:05:50,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98479153] [2021-11-19 05:05:50,717 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:50,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:05:50,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:05:50,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:05:50,719 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:05:52,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:05:54,769 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:05:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:54,803 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-11-19 05:05:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:05:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2021-11-19 05:05:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:54,805 INFO L225 Difference]: With dead ends: 54 [2021-11-19 05:05:54,805 INFO L226 Difference]: Without dead ends: 47 [2021-11-19 05:05:54,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:05:54,807 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:54,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 05:05:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-19 05:05:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-19 05:05:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:05:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-19 05:05:54,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 24 [2021-11-19 05:05:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:54,819 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-19 05:05:54,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-19 05:05:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-19 05:05:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 05:05:54,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:54,821 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:54,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:55,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:55,036 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:05:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:55,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1993243494, now seen corresponding path program 1 times [2021-11-19 05:05:55,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:55,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140037159] [2021-11-19 05:05:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:55,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:55,049 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:05:55,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407192613] [2021-11-19 05:05:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:55,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:55,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:55,051 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:55,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:05:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:55,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 05:05:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:06:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 05:06:03,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:06:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:13,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:13,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140037159] [2021-11-19 05:06:13,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:06:13,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407192613] [2021-11-19 05:06:13,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407192613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:06:13,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:06:13,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-11-19 05:06:13,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502605656] [2021-11-19 05:06:13,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:06:13,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:06:13,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:06:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=276, Unknown=3, NotChecked=0, Total=342 [2021-11-19 05:06:13,366 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:06:17,515 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:06:19,683 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:06:21,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:06:30,309 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:06:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:06:36,583 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-11-19 05:06:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:06:36,583 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-11-19 05:06:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:06:36,590 INFO L225 Difference]: With dead ends: 66 [2021-11-19 05:06:36,591 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 05:06:36,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=120, Invalid=526, Unknown=4, NotChecked=0, Total=650 [2021-11-19 05:06:36,600 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 28 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:06:36,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 109 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 183 Invalid, 3 Unknown, 23 Unchecked, 10.7s Time] [2021-11-19 05:06:36,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 05:06:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-19 05:06:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 52 states have internal predecessors, (56), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 05:06:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-11-19 05:06:36,643 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 27 [2021-11-19 05:06:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:06:36,647 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-11-19 05:06:36,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:06:36,647 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-11-19 05:06:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 05:06:36,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:06:36,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:36,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:06:36,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:36,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:06:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:36,865 INFO L85 PathProgramCache]: Analyzing trace with hash 648870724, now seen corresponding path program 2 times [2021-11-19 05:06:36,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:36,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116653032] [2021-11-19 05:06:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:36,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:36,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:06:36,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527680427] [2021-11-19 05:06:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:06:36,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:36,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:06:36,877 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:06:36,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:06:36,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:06:36,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:06:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 05:06:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:07:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:07:09,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:07:23,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:23,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116653032] [2021-11-19 05:07:23,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:07:23,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527680427] [2021-11-19 05:07:23,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527680427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:07:23,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:07:23,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-19 05:07:23,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812449296] [2021-11-19 05:07:23,780 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 05:07:23,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:07:23,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:07:23,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=525, Unknown=3, NotChecked=0, Total=650 [2021-11-19 05:07:23,782 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:07:29,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:07:30,511 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:07:32,664 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:07:37,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:07:38,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:07:40,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:07:42,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-19 05:07:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:07:49,584 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-11-19 05:07:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 05:07:49,585 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2021-11-19 05:07:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:07:49,586 INFO L225 Difference]: With dead ends: 90 [2021-11-19 05:07:49,586 INFO L226 Difference]: Without dead ends: 88 [2021-11-19 05:07:49,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=264, Invalid=1291, Unknown=5, NotChecked=0, Total=1560 [2021-11-19 05:07:49,588 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 29 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:07:49,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 192 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 487 Invalid, 5 Unknown, 0 Unchecked, 15.4s Time] [2021-11-19 05:07:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-19 05:07:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2021-11-19 05:07:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 69 states have internal predecessors, (74), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 05:07:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2021-11-19 05:07:49,603 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 45 [2021-11-19 05:07:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:07:49,604 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2021-11-19 05:07:49,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:07:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2021-11-19 05:07:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 05:07:49,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:07:49,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:49,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:07:49,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:49,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:07:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:49,821 INFO L85 PathProgramCache]: Analyzing trace with hash 789419334, now seen corresponding path program 3 times [2021-11-19 05:07:49,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:49,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750535779] [2021-11-19 05:07:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:49,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:49,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:07:49,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37810998] [2021-11-19 05:07:49,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:07:49,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:49,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:07:49,837 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:07:49,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:07:49,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 05:07:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:07:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 05:07:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:07:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:07:56,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:07:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:07:59,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:59,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750535779] [2021-11-19 05:07:59,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:07:59,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37810998] [2021-11-19 05:07:59,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37810998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:07:59,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:07:59,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 31 [2021-11-19 05:07:59,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032637721] [2021-11-19 05:07:59,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:07:59,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 05:07:59,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 05:07:59,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-11-19 05:07:59,062 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:08:09,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:08:09,129 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2021-11-19 05:08:09,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:08:09,130 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2021-11-19 05:08:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:08:09,131 INFO L225 Difference]: With dead ends: 111 [2021-11-19 05:08:09,131 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 05:08:09,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=621, Invalid=1929, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 05:08:09,134 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 100 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:08:09,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 67 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 225 Invalid, 0 Unknown, 16 Unchecked, 1.0s Time] [2021-11-19 05:08:09,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 05:08:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 05:08:09,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:08:09,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 05:08:09,136 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-11-19 05:08:09,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:08:09,136 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 05:08:09,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:08:09,137 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 05:08:09,137 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 05:08:09,140 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 05:08:09,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:08:09,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-19 05:08:09,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 05:08:20,028 WARN L227 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 139 DAG size of output: 16 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-19 05:08:20,031 INFO L854 garLoopResultBuilder]: At program point L33(line 33) the Hoare annotation is: (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) [2021-11-19 05:08:20,032 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-19 05:08:20,032 INFO L858 garLoopResultBuilder]: For program point L33-1(lines 32 43) no Hoare annotation was computed. [2021-11-19 05:08:20,032 INFO L861 garLoopResultBuilder]: At program point L46(lines 20 47) the Hoare annotation is: true [2021-11-19 05:08:20,032 INFO L858 garLoopResultBuilder]: For program point L44(line 44) no Hoare annotation was computed. [2021-11-19 05:08:20,032 INFO L858 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-11-19 05:08:20,033 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-19 05:08:20,033 INFO L854 garLoopResultBuilder]: At program point L32-2(lines 32 43) the Hoare annotation is: (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1|) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) [2021-11-19 05:08:20,033 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-19 05:08:20,033 INFO L854 garLoopResultBuilder]: At program point L32-3(lines 32 43) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~z~0#1|) .cse0) (= |ULTIMATE.start_main_~z~0#1| .cse0))) [2021-11-19 05:08:20,033 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-19 05:08:20,034 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-11-19 05:08:20,034 INFO L858 garLoopResultBuilder]: For program point L37(lines 37 40) no Hoare annotation was computed. [2021-11-19 05:08:20,034 INFO L858 garLoopResultBuilder]: For program point L37-2(lines 37 40) no Hoare annotation was computed. [2021-11-19 05:08:20,034 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2021-11-19 05:08:20,034 INFO L858 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2021-11-19 05:08:20,034 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2021-11-19 05:08:20,035 INFO L858 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2021-11-19 05:08:20,035 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2021-11-19 05:08:20,035 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-11-19 05:08:20,039 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:20,040 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 05:08:20,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 05:08:20 BoogieIcfgContainer [2021-11-19 05:08:20,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 05:08:20,053 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 05:08:20,053 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 05:08:20,053 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 05:08:20,054 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:25" (3/4) ... [2021-11-19 05:08:20,056 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-19 05:08:20,062 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-19 05:08:20,067 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-19 05:08:20,067 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-19 05:08:20,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-19 05:08:20,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-19 05:08:20,103 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/witness.graphml [2021-11-19 05:08:20,104 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 05:08:20,104 INFO L158 Benchmark]: Toolchain (without parser) took 175329.52ms. Allocated memory was 111.1MB in the beginning and 146.8MB in the end (delta: 35.7MB). Free memory was 79.5MB in the beginning and 59.2MB in the end (delta: 20.3MB). Peak memory consumption was 55.5MB. Max. memory is 16.1GB. [2021-11-19 05:08:20,105 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 111.1MB. Free memory is still 65.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:08:20,105 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.94ms. Allocated memory is still 111.1MB. Free memory was 79.3MB in the beginning and 86.3MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 05:08:20,105 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.25ms. Allocated memory is still 111.1MB. Free memory was 86.3MB in the beginning and 84.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 05:08:20,106 INFO L158 Benchmark]: Boogie Preprocessor took 42.52ms. Allocated memory is still 111.1MB. Free memory was 84.9MB in the beginning and 83.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 05:08:20,106 INFO L158 Benchmark]: RCFGBuilder took 391.98ms. Allocated memory is still 111.1MB. Free memory was 83.8MB in the beginning and 74.6MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 05:08:20,107 INFO L158 Benchmark]: TraceAbstraction took 174446.12ms. Allocated memory was 111.1MB in the beginning and 146.8MB in the end (delta: 35.7MB). Free memory was 73.8MB in the beginning and 62.4MB in the end (delta: 11.4MB). Peak memory consumption was 50.2MB. Max. memory is 16.1GB. [2021-11-19 05:08:20,107 INFO L158 Benchmark]: Witness Printer took 50.66ms. Allocated memory is still 146.8MB. Free memory was 62.4MB in the beginning and 59.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 05:08:20,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 111.1MB. Free memory is still 65.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.94ms. Allocated memory is still 111.1MB. Free memory was 79.3MB in the beginning and 86.3MB in the end (delta: -7.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.25ms. Allocated memory is still 111.1MB. Free memory was 86.3MB in the beginning and 84.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.52ms. Allocated memory is still 111.1MB. Free memory was 84.9MB in the beginning and 83.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 391.98ms. Allocated memory is still 111.1MB. Free memory was 83.8MB in the beginning and 74.6MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 174446.12ms. Allocated memory was 111.1MB in the beginning and 146.8MB in the end (delta: 35.7MB). Free memory was 73.8MB in the beginning and 62.4MB in the end (delta: 11.4MB). Peak memory consumption was 50.2MB. Max. memory is 16.1GB. * Witness Printer took 50.66ms. Allocated memory is still 146.8MB. Free memory was 62.4MB in the beginning and 59.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 174.3s, OverallIterations: 9, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 77.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 10.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 14 mSolverCounterUnknown, 307 SdHoareTripleChecker+Valid, 43.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 302 mSDsluCounter, 666 SdHoareTripleChecker+Invalid, 43.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 39 IncrementalHoareTripleChecker+Unchecked, 553 mSDsCounter, 238 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1329 IncrementalHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 238 mSolverCounterUnsat, 113 mSDtfsCounter, 1329 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 406 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 71.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=8, InterpolantAutomatonStates: 108, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 26 PreInvPairs, 52 NumberOfFragments, 61 HoareAnnotationTreeSize, 26 FomulaSimplifications, 139 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 1785 FormulaSimplificationTreeSizeReductionInter, 10.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 83.5s InterpolantComputationTime, 210 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 328 ConstructedInterpolants, 2 QuantifiedInterpolants, 3995 SizeOfPredicates, 36 NumberOfNonLiveVariables, 660 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 148/284 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((cond == 1 && 0 <= y) && 1 <= b) && y * x + z == a * b - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-11-19 05:08:20,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e2bc751-a9de-4571-9534-dde6777a8797/bin/uautomizer-ZXIjhQolGL/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 Result: TRUE