./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN --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 a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:28:54,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:28:54,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:28:54,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:28:54,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:28:54,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:28:54,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:28:54,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:28:54,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:28:54,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:28:54,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:28:54,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:28:54,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:28:54,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:28:54,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:28:54,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:28:54,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:28:54,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:28:54,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:28:54,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:28:54,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:28:54,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:28:54,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:28:54,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:28:54,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:28:54,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:28:54,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:28:54,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:28:54,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:28:54,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:28:54,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:28:54,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:28:54,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:28:54,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:28:54,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:28:54,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:28:54,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:28:54,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:28:54,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:28:54,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:28:54,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:28:54,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:28:54,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:28:54,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:28:54,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:28:54,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:28:54,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:28:54,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:28:54,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:28:54,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:28:54,355 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:28:54,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:28:54,357 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:28:54,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:28:54,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:28:54,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:28:54,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:28:54,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:28:54,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:28:54,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:28:54,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:28:54,359 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:28:54,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:28:54,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:28:54,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:28:54,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:28:54,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:28:54,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:28:54,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:28:54,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:28:54,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:28:54,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:28:54,362 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:28:54,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:28:54,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:28:54,363 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_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 [2022-11-20 09:28:54,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:28:54,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:28:54,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:28:54,731 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:28:54,732 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:28:54,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2022-11-20 09:28:57,724 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:28:57,969 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:28:57,970 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2022-11-20 09:28:57,978 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/data/2c959963a/555ae11e05e146bb825b0c8be09de10d/FLAGb87e06545 [2022-11-20 09:28:57,994 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/data/2c959963a/555ae11e05e146bb825b0c8be09de10d [2022-11-20 09:28:57,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:28:57,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:28:58,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:28:58,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:28:58,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:28:58,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:57" (1/1) ... [2022-11-20 09:28:58,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f86678a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58, skipping insertion in model container [2022-11-20 09:28:58,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:57" (1/1) ... [2022-11-20 09:28:58,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:28:58,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:28:58,267 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2022-11-20 09:28:58,319 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2022-11-20 09:28:58,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:28:58,342 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:28:58,374 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2022-11-20 09:28:58,402 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2022-11-20 09:28:58,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:28:58,423 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:28:58,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58 WrapperNode [2022-11-20 09:28:58,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:28:58,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:28:58,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:28:58,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:28:58,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,493 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 90 [2022-11-20 09:28:58,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:28:58,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:28:58,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:28:58,495 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:28:58,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:28:58,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:28:58,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:28:58,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:28:58,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (1/1) ... [2022-11-20 09:28:58,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:28:58,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:58,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:28:58,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:28:58,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:28:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-20 09:28:58,652 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-20 09:28:58,652 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-20 09:28:58,654 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-20 09:28:58,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:28:58,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:28:58,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:28:58,750 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:28:58,752 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:28:59,022 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:28:59,029 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:28:59,029 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 09:28:59,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:28:59 BoogieIcfgContainer [2022-11-20 09:28:59,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:28:59,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:28:59,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:28:59,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:28:59,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:28:57" (1/3) ... [2022-11-20 09:28:59,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cff057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:28:59, skipping insertion in model container [2022-11-20 09:28:59,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:58" (2/3) ... [2022-11-20 09:28:59,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23cff057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:28:59, skipping insertion in model container [2022-11-20 09:28:59,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:28:59" (3/3) ... [2022-11-20 09:28:59,054 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_6.i [2022-11-20 09:28:59,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:28:59,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 09:28:59,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:59,156 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e37f017, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:59,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:28:59,161 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:28:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:28:59,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:59,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:59,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:59,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:59,178 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2022-11-20 09:28:59,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:59,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383265162] [2022-11-20 09:28:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:59,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:59,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:28:59,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802110368] [2022-11-20 09:28:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:59,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:59,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:59,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:59,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:28:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:59,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 09:28:59,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:59,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:59,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:59,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383265162] [2022-11-20 09:28:59,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:28:59,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802110368] [2022-11-20 09:28:59,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802110368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:59,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:59,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:59,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839264219] [2022-11-20 09:28:59,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:59,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:59,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:59,594 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-11-20 09:28:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:59,619 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-11-20 09:28:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) Word has length 11 [2022-11-20 09:28:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:59,631 INFO L225 Difference]: With dead ends: 72 [2022-11-20 09:28:59,631 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 09:28:59,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:59,639 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:59,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:28:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 09:28:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 09:28:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:28:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-20 09:28:59,687 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2022-11-20 09:28:59,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:59,687 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-20 09:28:59,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-11-20 09:28:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-20 09:28:59,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:28:59,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:59,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:59,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:59,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 09:28:59,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2022-11-20 09:28:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:59,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980933658] [2022-11-20 09:28:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:59,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:28:59,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866384882] [2022-11-20 09:28:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:59,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:59,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:59,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:59,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:29:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:00,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:29:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:00,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:29:00,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:00,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980933658] [2022-11-20 09:29:00,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:29:00,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866384882] [2022-11-20 09:29:00,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866384882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:00,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:00,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:29:00,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140638570] [2022-11-20 09:29:00,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:00,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:29:00,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:00,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:29:00,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:00,124 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-20 09:29:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:00,152 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-11-20 09:29:00,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:29:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2022-11-20 09:29:00,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:00,155 INFO L225 Difference]: With dead ends: 39 [2022-11-20 09:29:00,155 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 09:29:00,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:29:00,160 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:00,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:29:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 09:29:00,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 09:29:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:29:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-20 09:29:00,171 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-11-20 09:29:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:00,172 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-20 09:29:00,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-20 09:29:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-20 09:29:00,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:29:00,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:00,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:00,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 09:29:00,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:00,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:00,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2022-11-20 09:29:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:00,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95977928] [2022-11-20 09:29:00,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:00,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:00,401 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:29:00,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553542551] [2022-11-20 09:29:00,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:00,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:00,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:00,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:00,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:29:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:00,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:29:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:00,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:00,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95977928] [2022-11-20 09:29:00,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:29:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553542551] [2022-11-20 09:29:00,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553542551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:00,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:00,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-20 09:29:00,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453905634] [2022-11-20 09:29:00,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:00,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:29:00,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:00,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:29:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:29:00,696 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-20 09:29:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:00,804 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-20 09:29:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:29:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) Word has length 12 [2022-11-20 09:29:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:00,809 INFO L225 Difference]: With dead ends: 39 [2022-11-20 09:29:00,809 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 09:29:00,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:29:00,811 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:00,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:29:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 09:29:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-20 09:29:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:29:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-20 09:29:00,821 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-11-20 09:29:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:00,821 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-20 09:29:00,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-20 09:29:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-20 09:29:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:29:00,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:00,823 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:00,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:01,026 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:01,028 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2022-11-20 09:29:01,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:01,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542974137] [2022-11-20 09:29:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:01,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:01,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:29:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536490809] [2022-11-20 09:29:01,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:29:01,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:01,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:01,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:29:11,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:29:11,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:11,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 09:29:11,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:02,701 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-20 09:30:22,846 WARN L837 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-20 09:30:43,310 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (= .cse0 |c_ULTIMATE.start_gcd_test_#res#1|) (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-20 09:31:03,768 WARN L837 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from false [2022-11-20 09:31:05,772 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256))) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| .cse0) 256) 0) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (not (= .cse0 0)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0)))) is different from true [2022-11-20 09:31:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 09:31:24,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:21,637 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse28 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse29 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse13 (<= .cse29 127)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse8 (not .cse18)) (.cse25 (= .cse28 0)) (.cse2 (<= .cse28 127)) (.cse17 (mod .cse27 256))) (let ((.cse19 (<= .cse17 127)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse3 (not .cse2)) (.cse15 (or .cse23 .cse8 .cse25)) (.cse6 (= .cse29 0)) (.cse7 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse10 (not .cse13)) (.cse14 (not .cse9)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0)))) (and (or (let ((.cse5 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse17)) 256) 0)) .cse18))) (let ((.cse1 (or .cse14 (and (or .cse16 .cse8) .cse5))) (.cse4 (or .cse14 (and .cse5 .cse15)))) (and (or (let ((.cse0 (or (and .cse5 (or .cse6 .cse7 .cse8)) .cse9))) (and (or (and .cse0 .cse1) .cse2) (or .cse3 (and .cse4 .cse0)))) .cse10) (or (let ((.cse11 (or .cse9 (and (or .cse12 .cse8) .cse5)))) (and (or (and .cse1 .cse11) .cse2) (or (and .cse4 .cse11) .cse3))) .cse13)))) .cse19) (or (not .cse19) (let ((.cse22 (or .cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256) 0)) (= .cse17 0))) (.cse24 (= .cse27 0))) (let ((.cse21 (or .cse14 (and .cse22 (or .cse24 .cse16 .cse8))))) (and (or (let ((.cse20 (or (and (or .cse24 .cse12 .cse8) .cse22) .cse9))) (and (or .cse2 (and .cse20 .cse21)) (or (and (or .cse14 (and .cse22 (or .cse23 .cse24 .cse8 .cse25))) .cse20) .cse3))) .cse13) (or (let ((.cse26 (or .cse9 (and .cse22 (or .cse24 .cse6 .cse7 .cse8))))) (and (or .cse3 (and (or .cse14 (and .cse22 .cse15)) .cse26)) (or (and .cse26 .cse21) .cse2))) .cse10)))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from false [2022-11-20 09:32:23,643 WARN L859 $PredicateComparison]: unable to prove that (or (let ((.cse27 (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|))) (let ((.cse18 (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (.cse28 (mod (+ .cse27 |c_ULTIMATE.start_gcd_test_~b#1|) 256)) (.cse29 (mod (+ .cse27 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) (let ((.cse9 (< |c_ULTIMATE.start_gcd_test_~b#1| 0)) (.cse13 (<= .cse29 127)) (.cse23 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse28) 256) 0))) (.cse8 (not .cse18)) (.cse25 (= .cse28 0)) (.cse2 (<= .cse28 127)) (.cse17 (mod .cse27 256))) (let ((.cse19 (<= .cse17 127)) (.cse12 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse29)) 256) 0))) (.cse3 (not .cse2)) (.cse15 (or .cse23 .cse8 .cse25)) (.cse6 (= .cse29 0)) (.cse7 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse29) 256) 0))) (.cse10 (not .cse13)) (.cse14 (not .cse9)) (.cse16 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse28)) 256) 0)))) (and (or (let ((.cse5 (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) .cse17)) 256) 0)) .cse18))) (let ((.cse1 (or .cse14 (and (or .cse16 .cse8) .cse5))) (.cse4 (or .cse14 (and .cse5 .cse15)))) (and (or (let ((.cse0 (or (and .cse5 (or .cse6 .cse7 .cse8)) .cse9))) (and (or (and .cse0 .cse1) .cse2) (or .cse3 (and .cse4 .cse0)))) .cse10) (or (let ((.cse11 (or .cse9 (and (or .cse12 .cse8) .cse5)))) (and (or (and .cse1 .cse11) .cse2) (or (and .cse4 .cse11) .cse3))) .cse13)))) .cse19) (or (not .cse19) (let ((.cse22 (or .cse18 (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse17) 256) 0)) (= .cse17 0))) (.cse24 (= .cse27 0))) (let ((.cse21 (or .cse14 (and .cse22 (or .cse24 .cse16 .cse8))))) (and (or (let ((.cse20 (or (and (or .cse24 .cse12 .cse8) .cse22) .cse9))) (and (or .cse2 (and .cse20 .cse21)) (or (and (or .cse14 (and .cse22 (or .cse23 .cse24 .cse8 .cse25))) .cse20) .cse3))) .cse13) (or (let ((.cse26 (or .cse9 (and .cse22 (or .cse24 .cse6 .cse7 .cse8))))) (and (or .cse3 (and (or .cse14 (and .cse22 .cse15)) .cse26)) (or (and .cse26 .cse21) .cse2))) .cse10)))))))))) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) is different from true [2022-11-20 09:33:56,771 WARN L233 SmtUtils]: Spent 1.11m on a formula simplification. DAG size of input: 67 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:34:14,596 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:35:16,266 WARN L233 SmtUtils]: Spent 23.81s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:36:05,551 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from false [2022-11-20 09:36:07,553 WARN L859 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main1_~y~0#1_6| Int) (|v_ULTIMATE.start_main1_~x~0#1_5| Int)) (let ((.cse0 (mod (mod (mod (* 255 |v_ULTIMATE.start_main1_~x~0#1_5|) 256) |v_ULTIMATE.start_main1_~y~0#1_6|) 256))) (or (= .cse0 0) (not (= 0 (mod |v_ULTIMATE.start_main1_~x~0#1_5| |v_ULTIMATE.start_main1_~y~0#1_6|))) (<= 0 |v_ULTIMATE.start_main1_~x~0#1_5|) (not (= (mod (mod |v_ULTIMATE.start_main1_~y~0#1_6| .cse0) 256) 0)) (< (+ 128 |v_ULTIMATE.start_main1_~x~0#1_5|) 0) (<= |v_ULTIMATE.start_main1_~y~0#1_6| 0)))) is different from true [2022-11-20 09:36:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-20 09:36:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542974137] [2022-11-20 09:36:26,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:36:26,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536490809] [2022-11-20 09:36:26,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536490809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:26,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:26,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-20 09:36:26,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408731002] [2022-11-20 09:36:26,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:26,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 09:36:26,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 09:36:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=115, Unknown=25, NotChecked=162, Total=342 [2022-11-20 09:36:26,580 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-11-20 09:37:23,226 WARN L233 SmtUtils]: Spent 42.91s on a formula simplification. DAG size of input: 45 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:37:25,317 WARN L837 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (let ((.cse2 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (let ((.cse0 (<= .cse2 127))) (and (let ((.cse1 (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (not .cse0) (= 0 .cse1) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0)))) (let ((.cse3 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) 256) 0)) .cse0 (= .cse3 0)))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse6 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse5 (<= .cse6 127))) (and (let ((.cse4 (mod (+ .cse6 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse4 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse5 (= .cse4 0))) (let ((.cse7 (mod (mod .cse6 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse5) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse7) 256) 0)) (= .cse7 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|))) is different from false [2022-11-20 09:37:27,321 WARN L859 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main1_~x~0#1| 127) (= (mod |c_ULTIMATE.start_gcd_test_~a#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (<= |c_ULTIMATE.start_gcd_test_~a#1| 127) (<= |c_ULTIMATE.start_gcd_test_~b#1| 127) (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)) (<= 0 (+ 128 |c_ULTIMATE.start_main1_~x~0#1|)) (<= |c_ULTIMATE.start_main1_~y~0#1| 127) (or (let ((.cse2 (mod (* |c_ULTIMATE.start_gcd_test_~a#1| 255) 256))) (let ((.cse0 (<= .cse2 127))) (and (let ((.cse1 (mod (mod .cse2 |c_ULTIMATE.start_gcd_test_~b#1|) 256))) (or (not .cse0) (= 0 .cse1) (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| .cse1) 256) 0)))) (let ((.cse3 (mod (+ .cse2 (- 256)) |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_gcd_test_~b#1| (+ (- 256) (mod (+ .cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| 255)) 256))) 256) 0)) .cse0 (= .cse3 0)))))) (< |c_ULTIMATE.start_gcd_test_~b#1| 0) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (< 0 |c_ULTIMATE.start_gcd_test_~b#1|) (or (not (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_main1_~y~0#1|) 0)) (let ((.cse6 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (let ((.cse5 (<= .cse6 127))) (and (let ((.cse4 (mod (+ .cse6 (- 256)) |c_ULTIMATE.start_main1_~y~0#1|))) (or (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| (+ (- 256) (mod (+ .cse4 (* |c_ULTIMATE.start_main1_~y~0#1| 255)) 256))) 256) 0)) .cse5 (= .cse4 0))) (let ((.cse7 (mod (mod .cse6 |c_ULTIMATE.start_main1_~y~0#1|) 256))) (or (not .cse5) (not (= (mod (mod |c_ULTIMATE.start_main1_~y~0#1| .cse7) 256) 0)) (= .cse7 0)))))) (not (< 0 |c_ULTIMATE.start_main1_~y~0#1|)) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|))) is different from true [2022-11-20 09:38:43,343 WARN L233 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 83 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:39:46,297 WARN L233 SmtUtils]: Spent 35.38s on a formula simplification. DAG size of input: 45 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:39:48,303 WARN L837 $PredicateComparison]: unable to prove that (and (or (not (= |c_ULTIMATE.start_gcd_test_~b#1| 0)) (not (<= |c_ULTIMATE.start_gcd_test_~a#1| 127)) (not (<= 0 (+ |c_ULTIMATE.start_gcd_test_~a#1| 128)))) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_12| Int) (|v_ULTIMATE.start_gcd_test_~a#1_14| Int)) (and (< 0 |v_ULTIMATE.start_gcd_test_~a#1_14|) (<= 0 (+ 128 |v_ULTIMATE.start_gcd_test_~a#1_12|)) (= (mod |v_ULTIMATE.start_gcd_test_~a#1_12| |v_ULTIMATE.start_gcd_test_~a#1_14|) 0) (= |c_ULTIMATE.start_gcd_test_~b#1| (mod (mod |v_ULTIMATE.start_gcd_test_~a#1_14| |c_ULTIMATE.start_gcd_test_~a#1|) 256)) (= |c_ULTIMATE.start_gcd_test_~a#1| (mod (mod (mod (* 255 |v_ULTIMATE.start_gcd_test_~a#1_12|) 256) |v_ULTIMATE.start_gcd_test_~a#1_14|) 256)) (< |v_ULTIMATE.start_gcd_test_~a#1_12| 0))) (not (< |c_ULTIMATE.start_gcd_test_~a#1| 0)) (not (= |c_ULTIMATE.start_gcd_test_~a#1| 0))) is different from false [2022-11-20 09:39:50,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:39:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:51,153 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-20 09:39:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:39:51,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) Word has length 13 [2022-11-20 09:39:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:51,161 INFO L225 Difference]: With dead ends: 43 [2022-11-20 09:39:51,162 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 09:39:51,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 375.0s TimeCoverageRelationStatistics Valid=59, Invalid=174, Unknown=39, NotChecked=280, Total=552 [2022-11-20 09:39:51,164 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:51,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 404 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 1 Unknown, 105 Unchecked, 2.9s Time] [2022-11-20 09:39:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 09:39:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-11-20 09:39:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:39:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-20 09:39:51,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-20 09:39:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:51,175 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-20 09:39:51,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-11-20 09:39:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-20 09:39:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:39:51,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:51,177 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:51,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:51,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:39:51,388 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:39:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:51,389 INFO L85 PathProgramCache]: Analyzing trace with hash 403427572, now seen corresponding path program 1 times [2022-11-20 09:39:51,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:39:51,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278892899] [2022-11-20 09:39:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:39:51,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:39:51,402 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:39:51,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444025015] [2022-11-20 09:39:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:39:51,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:39:51,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:39:51,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:39:51,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:39:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:39:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:39:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:52,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:46,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 139 [2022-11-20 09:40:46,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:40:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278892899] [2022-11-20 09:40:46,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:40:46,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444025015] [2022-11-20 09:40:46,588 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-20 09:40:46,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:46,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:40:46,789 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:648) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:306) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 52 more [2022-11-20 09:40:46,793 INFO L158 Benchmark]: Toolchain (without parser) took 708793.95ms. Allocated memory was 169.9MB in the beginning and 209.7MB in the end (delta: 39.8MB). Free memory was 138.0MB in the beginning and 88.8MB in the end (delta: 49.1MB). Peak memory consumption was 91.4MB. Max. memory is 16.1GB. [2022-11-20 09:40:46,794 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 169.9MB. Free memory is still 143.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 09:40:46,794 INFO L158 Benchmark]: CACSL2BoogieTranslator took 423.74ms. Allocated memory is still 169.9MB. Free memory was 137.4MB in the beginning and 126.1MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 09:40:46,795 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.41ms. Allocated memory is still 169.9MB. Free memory was 126.1MB in the beginning and 124.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 09:40:46,795 INFO L158 Benchmark]: Boogie Preprocessor took 61.45ms. Allocated memory is still 169.9MB. Free memory was 124.0MB in the beginning and 122.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 09:40:46,796 INFO L158 Benchmark]: RCFGBuilder took 474.55ms. Allocated memory is still 169.9MB. Free memory was 122.8MB in the beginning and 109.9MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 09:40:46,796 INFO L158 Benchmark]: TraceAbstraction took 707745.46ms. Allocated memory was 169.9MB in the beginning and 209.7MB in the end (delta: 39.8MB). Free memory was 108.8MB in the beginning and 88.8MB in the end (delta: 19.9MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. [2022-11-20 09:40:46,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 169.9MB. Free memory is still 143.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 423.74ms. Allocated memory is still 169.9MB. Free memory was 137.4MB in the beginning and 126.1MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.41ms. Allocated memory is still 169.9MB. Free memory was 126.1MB in the beginning and 124.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.45ms. Allocated memory is still 169.9MB. Free memory was 124.0MB in the beginning and 122.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 474.55ms. Allocated memory is still 169.9MB. Free memory was 122.8MB in the beginning and 109.9MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 707745.46ms. Allocated memory was 169.9MB in the beginning and 209.7MB in the end (delta: 39.8MB). Free memory was 108.8MB in the beginning and 88.8MB in the end (delta: 19.9MB). Peak memory consumption was 62.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. No stderr output.: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN --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 a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:40:49,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:40:49,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:40:49,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:40:49,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:40:49,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:40:49,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:40:49,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:40:49,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:40:49,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:40:49,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:40:49,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:40:49,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:40:49,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:40:49,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:40:49,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:40:49,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:40:49,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:40:49,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:40:49,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:40:49,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:40:49,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:40:49,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:40:49,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:40:49,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:40:49,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:40:49,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:40:49,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:40:49,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:40:49,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:40:49,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:40:49,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:40:49,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:40:49,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:40:49,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:40:49,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:40:49,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:40:49,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:40:49,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:40:49,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:40:49,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:40:49,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-20 09:40:49,799 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:40:49,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:40:49,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:40:49,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:40:49,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:40:49,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:40:49,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:40:49,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:40:49,805 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:40:49,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:40:49,807 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:40:49,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:40:49,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:40:49,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:40:49,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:40:49,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:40:49,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:40:49,809 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 09:40:49,809 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 09:40:49,810 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:40:49,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:40:49,810 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:40:49,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:40:49,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:40:49,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:40:49,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:40:49,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:40:49,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:40:49,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:40:49,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:40:49,813 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 09:40:49,813 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 09:40:49,814 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:40:49,814 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:40:49,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:40:49,815 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 09:40:49,815 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_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a842a693834937bbb730d9f1eb46f6df5c10533a9bdb1ffd45fcb777ef149243 [2022-11-20 09:40:50,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:40:50,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:40:50,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:40:50,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:40:50,430 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:40:50,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2022-11-20 09:40:54,259 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:40:54,527 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:40:54,528 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i [2022-11-20 09:40:54,538 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/data/5734a11dc/f8449ca2d21346fdbfafebeb65f5090c/FLAG934192cb8 [2022-11-20 09:40:54,563 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/data/5734a11dc/f8449ca2d21346fdbfafebeb65f5090c [2022-11-20 09:40:54,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:40:54,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:40:54,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:40:54,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:40:54,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:40:54,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:54,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e65e809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54, skipping insertion in model container [2022-11-20 09:40:54,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:54,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:40:54,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:40:54,796 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2022-11-20 09:40:54,830 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2022-11-20 09:40:54,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:40:54,851 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:40:54,870 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[1226,1239] [2022-11-20 09:40:54,884 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/sv-benchmarks/c/combinations/gcd_1+newton_3_6.i[2828,2841] [2022-11-20 09:40:54,886 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:40:54,907 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:40:54,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54 WrapperNode [2022-11-20 09:40:54,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:40:54,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:40:54,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:40:54,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:40:54,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:54,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:54,963 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2022-11-20 09:40:54,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:40:54,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:40:54,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:40:54,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:40:54,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:54,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:54,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:54,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:54,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:55,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:55,022 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:55,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:55,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:40:55,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:40:55,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:40:55,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:40:55,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (1/1) ... [2022-11-20 09:40:55,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:40:55,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:40:55,081 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:40:55,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:40:55,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:40:55,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 09:40:55,141 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-20 09:40:55,141 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-20 09:40:55,142 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-20 09:40:55,142 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-20 09:40:55,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:40:55,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:40:55,300 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:40:55,303 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:41:05,689 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:41:05,705 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:41:05,706 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 09:41:05,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:41:05 BoogieIcfgContainer [2022-11-20 09:41:05,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:41:05,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:41:05,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:41:05,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:41:05,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:40:54" (1/3) ... [2022-11-20 09:41:05,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ee65a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:41:05, skipping insertion in model container [2022-11-20 09:41:05,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:54" (2/3) ... [2022-11-20 09:41:05,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ee65a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:41:05, skipping insertion in model container [2022-11-20 09:41:05,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:41:05" (3/3) ... [2022-11-20 09:41:05,735 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_6.i [2022-11-20 09:41:05,763 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:41:05,763 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 09:41:05,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:41:05,843 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26d68a86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:41:05,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:41:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:41:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:41:05,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:05,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:05,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:41:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2022-11-20 09:41:05,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:05,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778517856] [2022-11-20 09:41:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:41:05,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:05,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:05,895 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:41:05,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 09:41:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:41:06,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 09:41:06,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:41:06,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:41:06,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:06,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778517856] [2022-11-20 09:41:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778517856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:41:06,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:41:06,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:41:06,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188088355] [2022-11-20 09:41:06,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:41:06,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:41:06,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:06,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:41:06,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:41:06,206 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-11-20 09:41:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:06,252 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-11-20 09:41:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:41:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) Word has length 11 [2022-11-20 09:41:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:06,267 INFO L225 Difference]: With dead ends: 72 [2022-11-20 09:41:06,268 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 09:41:06,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:41:06,278 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:06,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:41:06,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 09:41:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 09:41:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:41:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-20 09:41:06,348 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2022-11-20 09:41:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:06,350 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-20 09:41:06,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-11-20 09:41:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-20 09:41:06,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:41:06,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:06,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:06,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:06,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:06,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:41:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2022-11-20 09:41:06,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:06,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946135829] [2022-11-20 09:41:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:41:06,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:06,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:41:06,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 09:41:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:41:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:41:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:41:06,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:41:06,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:06,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946135829] [2022-11-20 09:41:06,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946135829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:41:06,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:41:06,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:41:06,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270027955] [2022-11-20 09:41:06,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:41:06,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:41:06,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:41:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:41:06,857 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-20 09:41:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:06,941 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-11-20 09:41:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:41:06,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2022-11-20 09:41:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:06,944 INFO L225 Difference]: With dead ends: 39 [2022-11-20 09:41:06,944 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 09:41:06,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:41:06,946 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:06,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:41:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 09:41:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-20 09:41:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:41:06,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-20 09:41:06,958 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2022-11-20 09:41:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:06,959 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-20 09:41:06,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-20 09:41:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-20 09:41:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:41:06,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:06,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:06,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:07,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:07,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:41:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2022-11-20 09:41:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:07,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676219004] [2022-11-20 09:41:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:41:07,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:07,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:07,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:41:07,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 09:41:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:41:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:41:07,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:41:07,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:41:07,963 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676219004] [2022-11-20 09:41:07,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676219004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:07,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:07,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-20 09:41:07,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831174547] [2022-11-20 09:41:07,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:07,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:41:07,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:07,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:41:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:41:07,968 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-20 09:41:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:08,547 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-20 09:41:08,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:41:08,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) Word has length 12 [2022-11-20 09:41:08,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:08,550 INFO L225 Difference]: With dead ends: 39 [2022-11-20 09:41:08,550 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 09:41:08,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:41:08,552 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:08,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:41:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 09:41:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-20 09:41:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:41:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-20 09:41:08,562 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2022-11-20 09:41:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:08,562 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-20 09:41:08,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-20 09:41:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-20 09:41:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:41:08,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:08,564 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:08,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:08,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:08,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:41:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2022-11-20 09:41:08,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:08,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733942522] [2022-11-20 09:41:08,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:41:08,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:08,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:08,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:41:08,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 09:41:10,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:41:10,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:10,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:41:10,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:41:15,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:41:28,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733942522] [2022-11-20 09:41:28,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733942522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:28,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:28,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2022-11-20 09:41:28,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056402883] [2022-11-20 09:41:28,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:28,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:41:28,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:41:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2022-11-20 09:41:28,820 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2022-11-20 09:41:31,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 09:41:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:43,355 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-11-20 09:41:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:41:43,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) Word has length 13 [2022-11-20 09:41:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:43,363 INFO L225 Difference]: With dead ends: 47 [2022-11-20 09:41:43,363 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 09:41:43,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=59, Invalid=150, Unknown=1, NotChecked=0, Total=210 [2022-11-20 09:41:43,365 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:43,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 253 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 15 Unchecked, 3.5s Time] [2022-11-20 09:41:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 09:41:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-20 09:41:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:41:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-20 09:41:43,375 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2022-11-20 09:41:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:43,375 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-20 09:41:43,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 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) [2022-11-20 09:41:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-20 09:41:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:41:43,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:43,377 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:43,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-20 09:41:43,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:43,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:41:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:43,592 INFO L85 PathProgramCache]: Analyzing trace with hash -326992466, now seen corresponding path program 1 times [2022-11-20 09:41:43,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:43,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120485348] [2022-11-20 09:41:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:41:43,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:43,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:41:43,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 09:41:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:41:43,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:41:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:44,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:45,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:45,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120485348] [2022-11-20 09:41:45,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120485348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:45,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:45,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-11-20 09:41:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244290409] [2022-11-20 09:41:45,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:41:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:41:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:41:45,178 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-20 09:41:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:45,607 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-11-20 09:41:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:41:45,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) Word has length 14 [2022-11-20 09:41:45,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:45,609 INFO L225 Difference]: With dead ends: 35 [2022-11-20 09:41:45,609 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 09:41:45,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:41:45,611 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:45,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:41:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 09:41:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-20 09:41:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 09:41:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-20 09:41:45,617 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-11-20 09:41:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:45,618 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-20 09:41:45,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-20 09:41:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-20 09:41:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 09:41:45,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:45,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:45,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:45,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:45,823 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:41:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:45,824 INFO L85 PathProgramCache]: Analyzing trace with hash -614441937, now seen corresponding path program 1 times [2022-11-20 09:41:45,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:45,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746452571] [2022-11-20 09:41:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:41:45,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:45,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:45,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 09:41:45,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c361a69-03a4-41eb-9c92-1cb61d5f4bea/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process