./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y --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 f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:44:05,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:44:05,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:44:05,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:44:05,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:44:05,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:44:05,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:44:05,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:44:05,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:44:05,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:44:05,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:44:05,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:44:05,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:44:05,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:44:05,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:44:05,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:44:05,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:44:05,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:44:05,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:44:05,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:44:05,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:44:05,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:44:05,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:44:05,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:44:05,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:44:05,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:44:05,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:44:05,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:44:05,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:44:05,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:44:05,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:44:05,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:44:05,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:44:05,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:44:05,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:44:05,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:44:05,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:44:05,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:44:05,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:44:05,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:44:05,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:44:05,484 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:44:05,530 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:44:05,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:44:05,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:44:05,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:44:05,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:44:05,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:44:05,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:44:05,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:44:05,534 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:44:05,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:44:05,534 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:44:05,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:44:05,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:44:05,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:44:05,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:44:05,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:44:05,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:44:05,536 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:44:05,536 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:44:05,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:44:05,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:44:05,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:44:05,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:44:05,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:44:05,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:44:05,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:44:05,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:44:05,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:44:05,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:44:05,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:44:05,539 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:44:05,539 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:44:05,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:44:05,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:44:05,540 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_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 [2021-11-13 18:44:05,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:44:05,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:44:05,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:44:05,862 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:44:05,863 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:44:05,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2021-11-13 18:44:05,935 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data/d97a10c88/35d63a6bf9104690aa5e066b2a7c93d7/FLAG846b3c315 [2021-11-13 18:44:06,524 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:44:06,525 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2021-11-13 18:44:06,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data/d97a10c88/35d63a6bf9104690aa5e066b2a7c93d7/FLAG846b3c315 [2021-11-13 18:44:06,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data/d97a10c88/35d63a6bf9104690aa5e066b2a7c93d7 [2021-11-13 18:44:06,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:44:06,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:44:06,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:44:06,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:44:06,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:44:06,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:44:06" (1/1) ... [2021-11-13 18:44:06,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a25cb3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:06, skipping insertion in model container [2021-11-13 18:44:06,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:44:06" (1/1) ... [2021-11-13 18:44:06,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:44:06,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:44:07,187 WARN L228 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_4812a8ae-b689-4811-b10c-871117b7500f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2021-11-13 18:44:07,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:44:07,210 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:44:07,231 WARN L228 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_4812a8ae-b689-4811-b10c-871117b7500f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2021-11-13 18:44:07,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:44:07,267 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:44:07,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07 WrapperNode [2021-11-13 18:44:07,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:44:07,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:44:07,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:44:07,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:44:07,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:44:07,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:44:07,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:44:07,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:44:07,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:44:07,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:44:07,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:44:07,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:44:07,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (1/1) ... [2021-11-13 18:44:07,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:44:07,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:07,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:44:07,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:44:07,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:44:07,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:44:07,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:44:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:44:07,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 18:44:07,406 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 18:44:07,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:44:07,621 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:44:07,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:44:07 BoogieIcfgContainer [2021-11-13 18:44:07,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:44:07,625 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:44:07,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:44:07,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:44:07,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:44:06" (1/3) ... [2021-11-13 18:44:07,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c69dfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:44:07, skipping insertion in model container [2021-11-13 18:44:07,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:07" (2/3) ... [2021-11-13 18:44:07,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c69dfcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:44:07, skipping insertion in model container [2021-11-13 18:44:07,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:44:07" (3/3) ... [2021-11-13 18:44:07,632 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2021-11-13 18:44:07,637 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:44:07,637 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:44:07,687 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:44:07,693 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 [2021-11-13 18:44:07,693 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:44:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2021-11-13 18:44:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:44:07,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:07,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:07,714 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:07,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:07,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1090701444, now seen corresponding path program 1 times [2021-11-13 18:44:07,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:07,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835143396] [2021-11-13 18:44:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:07,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:07,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:07,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835143396] [2021-11-13 18:44:07,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835143396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:07,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:07,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:44:07,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347787271] [2021-11-13 18:44:07,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:07,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:44:07,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:07,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:44:07,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:44:07,945 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:07,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:07,988 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2021-11-13 18:44:07,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:44:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-13 18:44:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:07,999 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:44:08,000 INFO L226 Difference]: Without dead ends: 17 [2021-11-13 18:44:08,005 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 [2021-11-13 18:44:08,011 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:08,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:44:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-13 18:44:08,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-13 18:44:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-11-13 18:44:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-13 18:44:08,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-11-13 18:44:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:08,058 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-13 18:44:08,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-13 18:44:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:44:08,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:08,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:08,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:44:08,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:08,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2095969935, now seen corresponding path program 1 times [2021-11-13 18:44:08,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:08,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399551993] [2021-11-13 18:44:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:08,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:08,124 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:44:08,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816308183] [2021-11-13 18:44:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:08,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:08,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:08,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:08,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:44:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:08,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:44:08,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:08,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:44:08,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:08,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399551993] [2021-11-13 18:44:08,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:44:08,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816308183] [2021-11-13 18:44:08,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816308183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:08,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:08,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:44:08,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642497147] [2021-11-13 18:44:08,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:08,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:44:08,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:44:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:44:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:44:08,543 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-13 18:44:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:08,603 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-13 18:44:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:44:08,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2021-11-13 18:44:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:08,605 INFO L225 Difference]: With dead ends: 29 [2021-11-13 18:44:08,605 INFO L226 Difference]: Without dead ends: 26 [2021-11-13 18:44:08,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:44:08,607 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:08,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 35 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 41.25ms Time] [2021-11-13 18:44:08,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-13 18:44:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-13 18:44:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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) [2021-11-13 18:44:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-13 18:44:08,616 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2021-11-13 18:44:08,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:08,616 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-13 18:44:08,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-13 18:44:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-13 18:44:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:44:08,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:08,618 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:08,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:08,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:08,839 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash 975547596, now seen corresponding path program 1 times [2021-11-13 18:44:08,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:44:08,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137850083] [2021-11-13 18:44:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:08,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:44:08,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:44:08,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571622968] [2021-11-13 18:44:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:08,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:44:08,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:08,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:44:08,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:44:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:08,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:44:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:09,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:09,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:44:09,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137850083] [2021-11-13 18:44:09,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:44:09,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571622968] [2021-11-13 18:44:09,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_main_~b~0#1|] [2021-11-13 18:44:09,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:09,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-13 18:44:09,383 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-13 18:44:09,383 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-13 18:44:09,390 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:44:09,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:09,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-13 18:44:09,601 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-13 18:44:09,604 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:44:09,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:44:09 BoogieIcfgContainer [2021-11-13 18:44:09,616 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:44:09,616 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:44:09,616 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:44:09,617 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:44:09,617 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:44:07" (3/4) ... [2021-11-13 18:44:09,620 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 18:44:09,620 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:44:09,621 INFO L158 Benchmark]: Toolchain (without parser) took 2665.42ms. Allocated memory is still 111.1MB. Free memory was 70.4MB in the beginning and 53.2MB in the end (delta: 17.2MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2021-11-13 18:44:09,621 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory is still 86.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:44:09,622 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.64ms. Allocated memory is still 111.1MB. Free memory was 70.2MB in the beginning and 85.8MB in the end (delta: -15.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:44:09,622 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.81ms. Allocated memory is still 111.1MB. Free memory was 85.8MB in the beginning and 84.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:44:09,623 INFO L158 Benchmark]: Boogie Preprocessor took 22.27ms. Allocated memory is still 111.1MB. Free memory was 84.1MB in the beginning and 83.2MB in the end (delta: 904.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:44:09,623 INFO L158 Benchmark]: RCFGBuilder took 297.05ms. Allocated memory is still 111.1MB. Free memory was 83.2MB in the beginning and 73.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:44:09,624 INFO L158 Benchmark]: TraceAbstraction took 1990.76ms. Allocated memory is still 111.1MB. Free memory was 72.8MB in the beginning and 53.2MB in the end (delta: 19.6MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2021-11-13 18:44:09,624 INFO L158 Benchmark]: Witness Printer took 4.06ms. Allocated memory is still 111.1MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:44:09,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 111.1MB. Free memory is still 86.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.64ms. Allocated memory is still 111.1MB. Free memory was 70.2MB in the beginning and 85.8MB in the end (delta: -15.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.81ms. Allocated memory is still 111.1MB. Free memory was 85.8MB in the beginning and 84.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.27ms. Allocated memory is still 111.1MB. Free memory was 84.1MB in the beginning and 83.2MB in the end (delta: 904.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 297.05ms. Allocated memory is still 111.1MB. Free memory was 83.2MB in the beginning and 73.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1990.76ms. Allocated memory is still 111.1MB. Free memory was 72.8MB in the beginning and 53.2MB in the end (delta: 19.6MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * Witness Printer took 4.06ms. Allocated memory is still 111.1MB. Free memory is still 53.2MB. There was no memory consumed. 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 - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L29] CALL assume_abort_if_not(A>=0 && A<=5) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=5) [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L39] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10 SdHoareTripleChecker+Valid, 41.25ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 75 SdHoareTripleChecker+Invalid, 33.47ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33 IncrementalHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 38 mSDtfsCounter, 33 mSolverCounterSat, 3.03ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, InterpolantAutomatonStates: 8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 31 ConstructedInterpolants, 0 QuantifiedInterpolants, 203 SizeOfPredicates, 6 NumberOfNonLiveVariables, 104 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-13 18:44:09,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y --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 f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:44:12,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:44:12,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:44:12,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:44:12,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:44:12,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:44:12,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:44:12,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:44:12,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:44:12,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:44:12,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:44:12,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:44:12,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:44:12,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:44:12,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:44:12,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:44:12,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:44:12,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:44:12,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:44:12,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:44:12,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:44:12,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:44:12,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:44:12,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:44:12,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:44:12,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:44:12,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:44:12,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:44:12,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:44:12,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:44:12,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:44:12,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:44:12,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:44:12,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:44:12,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:44:12,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:44:12,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:44:12,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:44:12,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:44:12,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:44:12,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:44:12,774 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-13 18:44:12,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:44:12,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:44:12,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:44:12,809 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:44:12,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:44:12,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:44:12,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:44:12,812 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:44:12,812 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:44:12,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:44:12,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:44:12,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:44:12,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:44:12,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:44:12,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:44:12,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:44:12,814 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:44:12,814 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:44:12,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:44:12,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:44:12,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:44:12,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:44:12,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:44:12,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:44:12,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:44:12,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:44:12,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:44:12,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:44:12,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:44:12,818 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:44:12,818 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:44:12,818 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:44:12,819 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:44:12,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:44:12,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:44:12,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:44:12,820 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7372e141bce7d93eac34ddc01970d0d3ee3e3dd05571cb5550acbf38c8c76e9 [2021-11-13 18:44:13,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:44:13,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:44:13,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:44:13,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:44:13,403 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:44:13,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2021-11-13 18:44:13,506 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data/078e1a57c/0fee52a98a9f4d5180dfa1e8c950dbdf/FLAG174ea07e0 [2021-11-13 18:44:14,127 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:44:14,128 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i [2021-11-13 18:44:14,136 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data/078e1a57c/0fee52a98a9f4d5180dfa1e8c950dbdf/FLAG174ea07e0 [2021-11-13 18:44:14,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/data/078e1a57c/0fee52a98a9f4d5180dfa1e8c950dbdf [2021-11-13 18:44:14,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:44:14,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:44:14,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:44:14,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:44:14,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:44:14,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:44:14" (1/1) ... [2021-11-13 18:44:14,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a6806ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:14, skipping insertion in model container [2021-11-13 18:44:14,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:44:14" (1/1) ... [2021-11-13 18:44:14,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:44:14,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:44:14,817 WARN L228 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_4812a8ae-b689-4811-b10c-871117b7500f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2021-11-13 18:44:14,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:44:14,893 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:44:14,963 WARN L228 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_4812a8ae-b689-4811-b10c-871117b7500f/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound5.i[951,964] [2021-11-13 18:44:14,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:44:15,005 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:44:15,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15 WrapperNode [2021-11-13 18:44:15,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:44:15,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:44:15,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:44:15,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:44:15,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:44:15,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:44:15,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:44:15,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:44:15,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:44:15,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:44:15,121 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:44:15,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:44:15,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (1/1) ... [2021-11-13 18:44:15,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:44:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:44:15,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:44:15,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:44:15,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:44:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:44:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:44:15,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:44:15,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 18:44:15,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 18:44:15,506 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:44:15,506 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:44:15,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:44:15 BoogieIcfgContainer [2021-11-13 18:44:15,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:44:15,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:44:15,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:44:15,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:44:15,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:44:14" (1/3) ... [2021-11-13 18:44:15,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696139ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:44:15, skipping insertion in model container [2021-11-13 18:44:15,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:44:15" (2/3) ... [2021-11-13 18:44:15,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696139ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:44:15, skipping insertion in model container [2021-11-13 18:44:15,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:44:15" (3/3) ... [2021-11-13 18:44:15,534 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound5.i [2021-11-13 18:44:15,541 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:44:15,550 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:44:15,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:44:15,665 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 [2021-11-13 18:44:15,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:44:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2021-11-13 18:44:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:44:15,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:15,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:15,732 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:15,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1090701444, now seen corresponding path program 1 times [2021-11-13 18:44:15,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:15,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167288658] [2021-11-13 18:44:15,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:15,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:15,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:15,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:15,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:44:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:15,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 18:44:15,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:16,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:16,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:16,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167288658] [2021-11-13 18:44:16,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167288658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:16,113 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:16,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 18:44:16,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649858946] [2021-11-13 18:44:16,117 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:16,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:44:16,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:16,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:44:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:44:16,177 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:16,208 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2021-11-13 18:44:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:44:16,212 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-13 18:44:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:16,223 INFO L225 Difference]: With dead ends: 39 [2021-11-13 18:44:16,223 INFO L226 Difference]: Without dead ends: 17 [2021-11-13 18:44:16,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:44:16,237 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:16,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:44:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-13 18:44:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-13 18:44:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-11-13 18:44:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-13 18:44:16,300 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2021-11-13 18:44:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:16,301 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-13 18:44:16,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-13 18:44:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 18:44:16,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:16,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:16,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:16,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:16,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:16,519 INFO L85 PathProgramCache]: Analyzing trace with hash -2095969935, now seen corresponding path program 1 times [2021-11-13 18:44:16,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:16,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752868071] [2021-11-13 18:44:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:16,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:16,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:16,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:16,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:44:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:44:16,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:17,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:18,075 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:18,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752868071] [2021-11-13 18:44:18,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752868071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:18,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:18,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-11-13 18:44:18,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901287581] [2021-11-13 18:44:18,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:18,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:44:18,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:44:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:44:18,083 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:21,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:44:21,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:21,617 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-13 18:44:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:44:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-13 18:44:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:21,621 INFO L225 Difference]: With dead ends: 36 [2021-11-13 18:44:21,621 INFO L226 Difference]: Without dead ends: 32 [2021-11-13 18:44:21,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:44:21,624 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2710.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.68ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2798.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:21,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 60 Invalid, 106 Unknown, 0 Unchecked, 5.68ms Time], IncrementalHoareTripleChecker [27 Valid, 78 Invalid, 1 Unknown, 0 Unchecked, 2798.62ms Time] [2021-11-13 18:44:21,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-13 18:44:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-13 18:44:21,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:44:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-13 18:44:21,653 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 11 [2021-11-13 18:44:21,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:21,654 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-13 18:44:21,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-13 18:44:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:44:21,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:21,657 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:21,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:21,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:21,858 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:21,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2061362535, now seen corresponding path program 1 times [2021-11-13 18:44:21,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:21,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505888760] [2021-11-13 18:44:21,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:21,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:21,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:21,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:21,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:44:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:21,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:44:21,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:22,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:24,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:24,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505888760] [2021-11-13 18:44:24,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505888760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:24,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:44:24,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-11-13 18:44:24,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916156454] [2021-11-13 18:44:24,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:24,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:44:24,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:24,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:44:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:44:24,597 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:28,291 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:44:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:31,623 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2021-11-13 18:44:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:44:31,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-13 18:44:31,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:31,627 INFO L225 Difference]: With dead ends: 84 [2021-11-13 18:44:31,628 INFO L226 Difference]: Without dead ends: 75 [2021-11-13 18:44:31,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:44:31,632 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 117 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3190.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.18ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3364.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:31,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 141 Invalid, 326 Unknown, 0 Unchecked, 8.18ms Time], IncrementalHoareTripleChecker [102 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 3364.38ms Time] [2021-11-13 18:44:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-13 18:44:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2021-11-13 18:44:31,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.297872340425532) internal successors, (61), 50 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:44:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2021-11-13 18:44:31,656 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 15 [2021-11-13 18:44:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:31,657 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2021-11-13 18:44:31,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2021-11-13 18:44:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 18:44:31,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:31,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:31,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-13 18:44:31,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:31,863 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1791376988, now seen corresponding path program 1 times [2021-11-13 18:44:31,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:31,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538601393] [2021-11-13 18:44:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:31,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:31,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:31,867 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:31,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:44:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:44:31,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:31,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:32,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:32,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538601393] [2021-11-13 18:44:32,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538601393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:32,069 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:32,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:44:32,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797979040] [2021-11-13 18:44:32,070 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:32,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:44:32,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:44:32,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:44:32,072 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-11-13 18:44:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:32,107 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2021-11-13 18:44:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:44:32,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 19 [2021-11-13 18:44:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:32,111 INFO L225 Difference]: With dead ends: 76 [2021-11-13 18:44:32,111 INFO L226 Difference]: Without dead ends: 54 [2021-11-13 18:44:32,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:44:32,114 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.52ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:32,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 9 Unknown, 0 Unchecked, 0.52ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 23.85ms Time] [2021-11-13 18:44:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-13 18:44:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-13 18:44:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 45 states have internal predecessors, (55), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:44:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2021-11-13 18:44:32,130 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 19 [2021-11-13 18:44:32,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:32,130 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2021-11-13 18:44:32,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-11-13 18:44:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2021-11-13 18:44:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:44:32,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:32,133 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:32,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:32,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:32,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1303225261, now seen corresponding path program 2 times [2021-11-13 18:44:32,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:32,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264316786] [2021-11-13 18:44:32,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:44:32,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:32,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:32,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:44:32,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:44:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:32,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:44:32,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:44:32,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:44:33,892 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:33,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264316786] [2021-11-13 18:44:33,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264316786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:44:33,892 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:44:33,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2021-11-13 18:44:33,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825683833] [2021-11-13 18:44:33,893 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:44:33,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:44:33,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:33,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:44:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:44:33,894 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:34,234 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-11-13 18:44:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:44:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-13 18:44:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:34,238 INFO L225 Difference]: With dead ends: 72 [2021-11-13 18:44:34,238 INFO L226 Difference]: Without dead ends: 69 [2021-11-13 18:44:34,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:44:34,240 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.63ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 190.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:34,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 60 Invalid, 65 Unknown, 0 Unchecked, 1.63ms Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 9 Unchecked, 190.32ms Time] [2021-11-13 18:44:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-13 18:44:34,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-11-13 18:44:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 56 states have internal predecessors, (66), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:44:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-11-13 18:44:34,255 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 23 [2021-11-13 18:44:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:34,255 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-11-13 18:44:34,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:44:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-11-13 18:44:34,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 18:44:34,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:34,257 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:34,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-13 18:44:34,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:34,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2131212917, now seen corresponding path program 1 times [2021-11-13 18:44:34,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:34,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636962589] [2021-11-13 18:44:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:34,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:34,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:34,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:44:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:44:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:35,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:44:37,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:37,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636962589] [2021-11-13 18:44:37,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636962589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:37,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:44:37,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-11-13 18:44:37,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822164542] [2021-11-13 18:44:37,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:37,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:44:37,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:37,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:44:37,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:44:37,636 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:44:44,515 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:44:49,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:44:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:52,803 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2021-11-13 18:44:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:44:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 4 states have call successors, (4), 3 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 25 [2021-11-13 18:44:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:52,807 INFO L225 Difference]: With dead ends: 140 [2021-11-13 18:44:52,807 INFO L226 Difference]: Without dead ends: 104 [2021-11-13 18:44:52,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=284, Invalid=906, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:44:52,809 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 100 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4766.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.84ms SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4982.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:52,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 220 Invalid, 447 Unknown, 0 Unchecked, 5.84ms Time], IncrementalHoareTripleChecker [118 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 4982.65ms Time] [2021-11-13 18:44:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-13 18:44:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-11-13 18:44:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 67 states have internal predecessors, (75), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-13 18:44:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2021-11-13 18:44:52,838 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 25 [2021-11-13 18:44:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:52,838 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2021-11-13 18:44:52,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 17 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:44:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2021-11-13 18:44:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 18:44:52,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:52,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:52,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:53,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:53,062 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1335567410, now seen corresponding path program 2 times [2021-11-13 18:44:53,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:53,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308193785] [2021-11-13 18:44:53,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:44:53,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:53,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:53,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:44:53,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:44:53,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:53,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:44:53,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:44:53,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:44:53,401 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:53,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308193785] [2021-11-13 18:44:53,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308193785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:53,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:44:53,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-13 18:44:53,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967727343] [2021-11-13 18:44:53,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:53,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:44:53,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:53,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:44:53,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:44:53,404 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-13 18:44:53,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:53,488 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2021-11-13 18:44:53,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:44:53,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2021-11-13 18:44:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:53,490 INFO L225 Difference]: With dead ends: 127 [2021-11-13 18:44:53,490 INFO L226 Difference]: Without dead ends: 78 [2021-11-13 18:44:53,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:44:53,492 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.80ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:53,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 36 Unknown, 0 Unchecked, 0.80ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 72.25ms Time] [2021-11-13 18:44:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-13 18:44:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-13 18:44:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 62 states have internal predecessors, (70), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 18:44:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2021-11-13 18:44:53,508 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 29 [2021-11-13 18:44:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:53,508 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2021-11-13 18:44:53,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-13 18:44:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2021-11-13 18:44:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 18:44:53,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:53,510 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:53,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:53,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:53,718 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1234214144, now seen corresponding path program 3 times [2021-11-13 18:44:53,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:53,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195341801] [2021-11-13 18:44:53,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:44:53,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:53,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:53,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:53,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:44:53,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:44:53,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:53,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:44:53,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:44:54,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:44:54,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:54,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195341801] [2021-11-13 18:44:54,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195341801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:54,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:44:54,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-11-13 18:44:54,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055900141] [2021-11-13 18:44:54,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:54,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:44:54,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:54,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:44:54,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:44:54,591 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:44:55,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:55,647 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2021-11-13 18:44:55,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:44:55,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-13 18:44:55,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:55,649 INFO L225 Difference]: With dead ends: 115 [2021-11-13 18:44:55,649 INFO L226 Difference]: Without dead ends: 53 [2021-11-13 18:44:55,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:44:55,652 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 240.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 284.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:55,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 160 Invalid, 153 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [55 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 284.56ms Time] [2021-11-13 18:44:55,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-13 18:44:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-11-13 18:44:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:44:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-13 18:44:55,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 39 [2021-11-13 18:44:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:55,665 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-13 18:44:55,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:44:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-13 18:44:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:44:55,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:55,668 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:55,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:55,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:55,899 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1894170587, now seen corresponding path program 4 times [2021-11-13 18:44:55,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:55,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126127702] [2021-11-13 18:44:55,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:44:55,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:55,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:55,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:44:55,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:44:55,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:44:55,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 18:44:56,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:44:56,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:44:57,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:57,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126127702] [2021-11-13 18:44:57,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126127702] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:57,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:44:57,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-13 18:44:57,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749809520] [2021-11-13 18:44:57,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:57,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:44:57,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:44:57,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:44:57,437 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 18:44:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:58,634 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-11-13 18:44:58,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:44:58,635 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-11-13 18:44:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:58,636 INFO L225 Difference]: With dead ends: 71 [2021-11-13 18:44:58,636 INFO L226 Difference]: Without dead ends: 53 [2021-11-13 18:44:58,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:44:58,638 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 451.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.19ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 511.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:58,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 226 Invalid, 243 Unknown, 0 Unchecked, 4.19ms Time], IncrementalHoareTripleChecker [68 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 511.65ms Time] [2021-11-13 18:44:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-13 18:44:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-11-13 18:44:58,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 18:44:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-13 18:44:58,654 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 41 [2021-11-13 18:44:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:58,655 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-13 18:44:58,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 18:44:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-13 18:44:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 18:44:58,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:44:58,657 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:44:58,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:44:58,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:44:58,857 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:44:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:44:58,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2024152244, now seen corresponding path program 1 times [2021-11-13 18:44:58,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:44:58,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612143281] [2021-11-13 18:44:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:44:58,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:44:58,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:44:58,860 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:44:58,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:44:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:44:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:44:59,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:44:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:44:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:44:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 33 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:44:59,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:44:59,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612143281] [2021-11-13 18:44:59,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612143281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:44:59,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:44:59,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-11-13 18:44:59,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926865878] [2021-11-13 18:44:59,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:44:59,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:44:59,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:44:59,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:44:59,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:44:59,748 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:44:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:44:59,977 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-13 18:44:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:44:59,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 49 [2021-11-13 18:44:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:44:59,981 INFO L225 Difference]: With dead ends: 46 [2021-11-13 18:44:59,981 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 18:44:59,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:44:59,983 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 217.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:44:59,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 143 Invalid, 123 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 217.74ms Time] [2021-11-13 18:44:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 18:44:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 18:44:59,984 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) [2021-11-13 18:44:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 18:44:59,984 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-11-13 18:44:59,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:44:59,985 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 18:44:59,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:44:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 18:44:59,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 18:44:59,988 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:45:00,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:00,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:45:00,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 18:45:04,364 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-13 18:45:04,364 INFO L858 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2021-11-13 18:45:04,364 INFO L858 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-11-13 18:45:04,365 INFO L854 garLoopResultBuilder]: At program point L38-1(lines 38 47) the Hoare annotation is: (and (bvule |ULTIMATE.start_main_~A~0#1| (_ bv5 32)) (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|) (= |ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) [2021-11-13 18:45:04,365 INFO L854 garLoopResultBuilder]: At program point L34-2(lines 34 37) the Hoare annotation is: (let ((.cse5 (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse4 (= |ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse0 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse2 (bvule |ULTIMATE.start_main_~r~0#1| (_ bv5 32))) (.cse3 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32)))) (or (and (= |ULTIMATE.start_main_~b~0#1| (_ bv1 32)) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|) .cse3) (and .cse4 (= |ULTIMATE.start_main_~b~0#1| (_ bv2 32)) .cse1 .cse2 .cse5 .cse3) (and .cse4 .cse1 (bvuge |ULTIMATE.start_main_~r~0#1| (_ bv4 32)) .cse2 .cse5 .cse3 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv8 32) |ULTIMATE.start_main_~B~0#1|))) (and .cse4 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|)) .cse0 .cse1 .cse2 (bvuge |ULTIMATE.start_main_~r~0#1| (_ bv2 32)) .cse3))) [2021-11-13 18:45:04,365 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-13 18:45:04,365 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-13 18:45:04,365 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-13 18:45:04,366 INFO L861 garLoopResultBuilder]: At program point L49(lines 25 50) the Hoare annotation is: true [2021-11-13 18:45:04,366 INFO L858 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-11-13 18:45:04,366 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 46) no Hoare annotation was computed. [2021-11-13 18:45:04,366 INFO L858 garLoopResultBuilder]: For program point L43-2(lines 25 50) no Hoare annotation was computed. [2021-11-13 18:45:04,366 INFO L854 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (let ((.cse1 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv4 32) |ULTIMATE.start_main_~B~0#1|))) (.cse0 (= |ULTIMATE.start_main_~B~0#1| (_ bv1 32))) (.cse4 (bvule |ULTIMATE.start_main_~A~0#1| (_ bv5 32))) (.cse2 (= |ULTIMATE.start_main_~q~0#1| (_ bv0 32))) (.cse5 (= (bvadd |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~b~0#1|)) |ULTIMATE.start_main_~A~0#1|)) (.cse3 (= |ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32)))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|) .cse2 (not (bvuge |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~b~0#1|)) (bvuge |ULTIMATE.start_main_~r~0#1| (_ bv2 32)) .cse3) (and .cse0 .cse4 (= |ULTIMATE.start_main_~b~0#1| (_ bv2 32)) .cse2 .cse5 .cse3) (and (not (bvuge |ULTIMATE.start_main_~r~0#1| (bvmul |ULTIMATE.start_main_~b~0#1| (_ bv2 32)))) .cse0 .cse4 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv2 32) |ULTIMATE.start_main_~B~0#1|)) .cse5 .cse3) (let ((.cse6 (bvneg |ULTIMATE.start_main_~b~0#1|))) (and .cse0 .cse1 (bvuge |ULTIMATE.start_main_~A~0#1| (_ bv4 32)) (= |ULTIMATE.start_main_~r~0#1| (bvadd .cse6 |ULTIMATE.start_main_~A~0#1|)) (bvule (bvadd (bvmul .cse6 (_ bv4294967295 32)) |ULTIMATE.start_main_~r~0#1|) (_ bv5 32)) .cse3 (= |ULTIMATE.start_main_~q~0#1| (_ bv1 32)))) (and .cse0 .cse4 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~B~0#1|) .cse5 .cse3) (and .cse0 .cse4 .cse2 (bvuge |ULTIMATE.start_main_~r~0#1| (_ bv4 32)) .cse5 .cse3 (= |ULTIMATE.start_main_~b~0#1| (bvmul (_ bv8 32) |ULTIMATE.start_main_~B~0#1|))))) [2021-11-13 18:45:04,367 INFO L858 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2021-11-13 18:45:04,367 INFO L858 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2021-11-13 18:45:04,367 INFO L858 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2021-11-13 18:45:04,367 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2021-11-13 18:45:04,367 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2021-11-13 18:45:04,368 INFO L858 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2021-11-13 18:45:04,368 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2021-11-13 18:45:04,368 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-11-13 18:45:04,372 INFO L732 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1] [2021-11-13 18:45:04,373 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:45:04,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:45:04 BoogieIcfgContainer [2021-11-13 18:45:04,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:45:04,390 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:45:04,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:45:04,390 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:45:04,391 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:44:15" (3/4) ... [2021-11-13 18:45:04,394 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 18:45:04,400 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-13 18:45:04,405 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-13 18:45:04,405 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-13 18:45:04,405 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-13 18:45:04,405 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 18:45:04,438 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 18:45:04,439 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:45:04,439 INFO L158 Benchmark]: Toolchain (without parser) took 49931.36ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 38.3MB in the beginning and 37.6MB in the end (delta: 705.0kB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2021-11-13 18:45:04,440 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 58.7MB. Free memory was 39.5MB in the beginning and 39.5MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:45:04,440 INFO L158 Benchmark]: CACSL2BoogieTranslator took 492.94ms. Allocated memory is still 58.7MB. Free memory was 38.1MB in the beginning and 41.0MB in the end (delta: -2.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 18:45:04,441 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.52ms. Allocated memory is still 58.7MB. Free memory was 40.8MB in the beginning and 39.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:45:04,441 INFO L158 Benchmark]: Boogie Preprocessor took 63.88ms. Allocated memory is still 58.7MB. Free memory was 39.4MB in the beginning and 38.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:45:04,442 INFO L158 Benchmark]: RCFGBuilder took 389.01ms. Allocated memory is still 58.7MB. Free memory was 38.1MB in the beginning and 28.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:45:04,442 INFO L158 Benchmark]: TraceAbstraction took 48878.15ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 28.2MB in the beginning and 40.4MB in the end (delta: -12.3MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. [2021-11-13 18:45:04,443 INFO L158 Benchmark]: Witness Printer took 48.99ms. Allocated memory is still 79.7MB. Free memory was 40.4MB in the beginning and 37.6MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:45:04,445 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 58.7MB. Free memory was 39.5MB in the beginning and 39.5MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 492.94ms. Allocated memory is still 58.7MB. Free memory was 38.1MB in the beginning and 41.0MB in the end (delta: -2.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.52ms. Allocated memory is still 58.7MB. Free memory was 40.8MB in the beginning and 39.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 63.88ms. Allocated memory is still 58.7MB. Free memory was 39.4MB in the beginning and 38.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 389.01ms. Allocated memory is still 58.7MB. Free memory was 38.1MB in the beginning and 28.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 48878.15ms. Allocated memory was 58.7MB in the beginning and 79.7MB in the end (delta: 21.0MB). Free memory was 28.2MB in the beginning and 40.4MB in the end (delta: -12.3MB). Peak memory consumption was 34.3MB. Max. memory is 16.1GB. * Witness Printer took 48.99ms. Allocated memory is still 79.7MB. Free memory was 40.4MB in the beginning and 37.6MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: 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, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.7s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 28.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 441 SdHoareTripleChecker+Valid, 12446.02ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 441 mSDsluCounter, 1125 SdHoareTripleChecker+Invalid, 11802.13ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9 IncrementalHoareTripleChecker+Unchecked, 914 mSDsCounter, 395 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1102 IncrementalHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 395 mSolverCounterUnsat, 211 mSDtfsCounter, 1102 mSolverCounterSat, 33.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 566 GetRequests, 406 SyntacticMatches, 6 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 22.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=6, InterpolantAutomatonStates: 101, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 50 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 58 PreInvPairs, 92 NumberOfFragments, 268 HoareAnnotationTreeSize, 58 FomulaSimplifications, 20 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 3323 FormulaSimplificationTreeSizeReductionInter, 4.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 261 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 502 ConstructedInterpolants, 16 QuantifiedInterpolants, 2698 SizeOfPredicates, 26 NumberOfNonLiveVariables, 565 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 326/504 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: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((b == 1bv32 && r == A) && q == 0bv32) && ~bvule32(r, 5bv32)) && b == B) && cond == 1bv32) || (((((B == 1bv32 && b == 2bv32) && q == 0bv32) && ~bvule32(r, 5bv32)) && ~bvadd64(r, ~bvmul32(q, b)) == A) && cond == 1bv32)) || ((((((B == 1bv32 && q == 0bv32) && ~bvuge32(r, 4bv32)) && ~bvule32(r, 5bv32)) && ~bvadd64(r, ~bvmul32(q, b)) == A) && cond == 1bv32) && b == ~bvmul32(8bv32, B))) || ((((((B == 1bv32 && b == ~bvmul32(4bv32, B)) && r == A) && q == 0bv32) && ~bvule32(r, 5bv32)) && ~bvuge32(r, 2bv32)) && cond == 1bv32) RESULT: Ultimate proved your program to be correct! [2021-11-13 18:45:04,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4812a8ae-b689-4811-b10c-871117b7500f/bin/uautomizer-YU5uOKAj3y/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