./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ --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 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca --- 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-dbf71c6-m [2022-10-17 10:20:18,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:20:18,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:20:18,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:20:18,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:20:18,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:20:18,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:20:18,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:20:18,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:20:18,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:20:18,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:20:18,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:20:18,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:20:18,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:20:18,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:20:18,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:20:18,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:20:18,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:20:18,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:20:18,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:20:18,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:20:18,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:20:18,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:20:18,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:20:18,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:20:18,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:20:18,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:20:18,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:20:18,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:20:18,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:20:18,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:20:18,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:20:18,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:20:18,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:20:18,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:20:18,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:20:18,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:20:18,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:20:18,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:20:18,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:20:18,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:20:18,329 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:20:18,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:20:18,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:20:18,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:20:18,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:20:18,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:20:18,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:20:18,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:20:18,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:20:18,362 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:20:18,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:20:18,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:20:18,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:20:18,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:20:18,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:20:18,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:20:18,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:20:18,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:20:18,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:20:18,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:20:18,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:20:18,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:20:18,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:20:18,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:20:18,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:20:18,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:20:18,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:20:18,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:20:18,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:20:18,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:20:18,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:20:18,369 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:20:18,369 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:20:18,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:20:18,370 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_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97fbca6e87e25b4f87eb503f3dd8cdf02cc5219f6d8160a4d7fb4354cdd218ca [2022-10-17 10:20:18,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:20:18,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:20:18,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:20:18,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:20:18,707 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:20:18,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2022-10-17 10:20:18,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/data/860b91732/3f0470b47d40490f98d2abdbaf3094af/FLAG73a04e6d2 [2022-10-17 10:20:19,247 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:20:19,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2022-10-17 10:20:19,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/data/860b91732/3f0470b47d40490f98d2abdbaf3094af/FLAG73a04e6d2 [2022-10-17 10:20:19,649 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/data/860b91732/3f0470b47d40490f98d2abdbaf3094af [2022-10-17 10:20:19,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:20:19,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:20:19,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:20:19,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:20:19,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:20:19,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:20:19" (1/1) ... [2022-10-17 10:20:19,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cdd3322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:19, skipping insertion in model container [2022-10-17 10:20:19,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:20:19" (1/1) ... [2022-10-17 10:20:19,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:20:19,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:20:20,010 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2022-10-17 10:20:20,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:20:20,072 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:20:20,089 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound20.c[524,537] [2022-10-17 10:20:20,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:20:20,138 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:20:20,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20 WrapperNode [2022-10-17 10:20:20,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:20:20,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:20:20,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:20:20,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:20:20,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,212 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-10-17 10:20:20,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:20:20,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:20:20,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:20:20,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:20:20,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,260 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:20:20,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:20:20,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:20:20,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:20:20,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (1/1) ... [2022-10-17 10:20:20,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:20:20,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:20,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:20:20,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:20:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:20:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:20:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:20:20,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:20:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:20:20,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:20:20,441 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:20:20,445 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:20:20,671 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:20:20,678 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:20:20,678 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:20:20,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:20:20 BoogieIcfgContainer [2022-10-17 10:20:20,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:20:20,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:20:20,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:20:20,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:20:20,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:20:19" (1/3) ... [2022-10-17 10:20:20,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a5e52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:20:20, skipping insertion in model container [2022-10-17 10:20:20,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:20:20" (2/3) ... [2022-10-17 10:20:20,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a5e52f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:20:20, skipping insertion in model container [2022-10-17 10:20:20,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:20:20" (3/3) ... [2022-10-17 10:20:20,693 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.c [2022-10-17 10:20:20,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:20:20,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:20:20,792 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:20:20,802 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;@120f2a53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:20:20,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:20:20,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:20:20,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:20:20,832 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:20,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:20,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2022-10-17 10:20:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:20,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385780484] [2022-10-17 10:20:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:20,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:21,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:21,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385780484] [2022-10-17 10:20:21,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:20:21,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694798767] [2022-10-17 10:20:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:21,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:21,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:21,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:21,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:20:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:21,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:20:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:21,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:20:21,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694798767] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:21,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:21,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:20:21,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793552640] [2022-10-17 10:20:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:21,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:20:21,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:20:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:20:21,256 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:21,282 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-10-17 10:20:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:20:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 10:20:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:21,293 INFO L225 Difference]: With dead ends: 43 [2022-10-17 10:20:21,294 INFO L226 Difference]: Without dead ends: 19 [2022-10-17 10:20:21,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:20:21,302 INFO L413 NwaCegarLoop]: 29 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, 29 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 [2022-10-17 10:20:21,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:20:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-10-17 10:20:21,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-10-17 10:20:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-10-17 10:20:21,345 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2022-10-17 10:20:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:21,346 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-10-17 10:20:21,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-10-17 10:20:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:20:21,348 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:21,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:21,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:21,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 10:20:21,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2022-10-17 10:20:21,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:21,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80701654] [2022-10-17 10:20:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:21,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:21,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:21,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80701654] [2022-10-17 10:20:21,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:20:21,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940616964] [2022-10-17 10:20:21,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:21,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:21,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:21,630 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:21,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:20:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:21,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:20:21,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:21,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:20:21,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940616964] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:21,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:21,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:20:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724354000] [2022-10-17 10:20:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:21,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:20:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:20:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:20:21,786 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:21,813 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-10-17 10:20:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:20:21,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:20:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:21,815 INFO L225 Difference]: With dead ends: 29 [2022-10-17 10:20:21,817 INFO L226 Difference]: Without dead ends: 21 [2022-10-17 10:20:21,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:20:21,820 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:21,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:20:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-10-17 10:20:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-10-17 10:20:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-10-17 10:20:21,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2022-10-17 10:20:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:21,837 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-10-17 10:20:21,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-10-17 10:20:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:20:21,839 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:21,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:21,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:22,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:22,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2022-10-17 10:20:22,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:22,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118114532] [2022-10-17 10:20:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:22,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:22,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:22,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109276749] [2022-10-17 10:20:22,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:22,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:22,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:22,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:22,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:20:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:22,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:20:22,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:22,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:20:22,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118114532] [2022-10-17 10:20:22,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109276749] [2022-10-17 10:20:22,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109276749] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:22,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:22,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:20:22,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695701674] [2022-10-17 10:20:22,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:22,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:20:22,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:22,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:20:22,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:20:22,271 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:22,355 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-10-17 10:20:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:20:22,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:20:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:22,357 INFO L225 Difference]: With dead ends: 34 [2022-10-17 10:20:22,357 INFO L226 Difference]: Without dead ends: 32 [2022-10-17 10:20:22,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:20:22,359 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:22,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:20:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-10-17 10:20:22,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-10-17 10:20:22,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:20:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-10-17 10:20:22,370 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2022-10-17 10:20:22,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:22,370 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-10-17 10:20:22,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:20:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-10-17 10:20:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:20:22,372 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:22,372 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:22,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:22,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:22,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2022-10-17 10:20:22,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386064169] [2022-10-17 10:20:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:22,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:22,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:22,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120064059] [2022-10-17 10:20:22,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:22,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:22,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:22,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:22,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:20:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:22,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:20:22,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:23,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:20:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:23,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386064169] [2022-10-17 10:20:23,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120064059] [2022-10-17 10:20:23,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120064059] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:20:23,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:20:23,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-10-17 10:20:23,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901166406] [2022-10-17 10:20:23,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:20:23,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:20:23,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:20:23,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:20:23,431 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:24,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-10-17 10:20:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:25,545 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-10-17 10:20:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:20:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-10-17 10:20:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:25,548 INFO L225 Difference]: With dead ends: 47 [2022-10-17 10:20:25,548 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 10:20:25,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:20:25,550 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:25,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 68 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-17 10:20:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 10:20:25,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-10-17 10:20:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:20:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-10-17 10:20:25,570 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2022-10-17 10:20:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:25,571 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-10-17 10:20:25,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-10-17 10:20:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:20:25,576 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:25,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:25,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:25,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-10-17 10:20:25,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2022-10-17 10:20:25,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:25,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69230802] [2022-10-17 10:20:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:25,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:25,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:25,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728258600] [2022-10-17 10:20:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:25,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:25,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:25,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:20:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:25,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:20:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:25,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:20:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:25,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:25,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69230802] [2022-10-17 10:20:25,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:25,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728258600] [2022-10-17 10:20:25,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728258600] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:20:25,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:20:25,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-10-17 10:20:25,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150501825] [2022-10-17 10:20:25,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:20:25,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:20:25,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:20:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:20:25,994 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:26,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:26,128 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-10-17 10:20:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:20:26,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-10-17 10:20:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:26,135 INFO L225 Difference]: With dead ends: 95 [2022-10-17 10:20:26,135 INFO L226 Difference]: Without dead ends: 85 [2022-10-17 10:20:26,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:20:26,143 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 66 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:26,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 155 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:20:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-10-17 10:20:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-10-17 10:20:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:20:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-10-17 10:20:26,197 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 19 [2022-10-17 10:20:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:26,198 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-10-17 10:20:26,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:26,199 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-10-17 10:20:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 10:20:26,202 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:26,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:26,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:26,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:26,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:26,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2022-10-17 10:20:26,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:26,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505364664] [2022-10-17 10:20:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:26,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:26,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:26,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607429598] [2022-10-17 10:20:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:26,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:26,449 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:26,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:20:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 10:20:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:27,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:20:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:29,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505364664] [2022-10-17 10:20:29,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:29,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607429598] [2022-10-17 10:20:29,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607429598] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:20:29,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:20:29,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-10-17 10:20:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455012975] [2022-10-17 10:20:29,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:20:29,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:20:29,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:20:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:20:29,202 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:33,923 INFO L93 Difference]: Finished difference Result 120 states and 157 transitions. [2022-10-17 10:20:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:20:33,924 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-10-17 10:20:33,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:33,926 INFO L225 Difference]: With dead ends: 120 [2022-10-17 10:20:33,926 INFO L226 Difference]: Without dead ends: 114 [2022-10-17 10:20:33,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=87, Invalid=218, Unknown=1, NotChecked=0, Total=306 [2022-10-17 10:20:33,928 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:33,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 79 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-17 10:20:33,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-10-17 10:20:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 71. [2022-10-17 10:20:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 56 states have internal predecessors, (72), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:20:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-10-17 10:20:33,960 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2022-10-17 10:20:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:33,961 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-10-17 10:20:33,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-10-17 10:20:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 10:20:33,962 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:33,963 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:34,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:34,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:34,186 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:34,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:34,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2022-10-17 10:20:34,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:34,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139867316] [2022-10-17 10:20:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:34,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:34,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:34,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626653427] [2022-10-17 10:20:34,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:34,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:34,215 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:34,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:20:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:34,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:20:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:20:34,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:20:34,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139867316] [2022-10-17 10:20:34,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:34,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626653427] [2022-10-17 10:20:34,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626653427] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:34,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:34,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:20:34,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201002868] [2022-10-17 10:20:34,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:34,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:20:34,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:20:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:20:34,357 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:34,586 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-10-17 10:20:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:20:34,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-10-17 10:20:34,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:34,588 INFO L225 Difference]: With dead ends: 108 [2022-10-17 10:20:34,588 INFO L226 Difference]: Without dead ends: 96 [2022-10-17 10:20:34,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:20:34,590 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 52 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:34,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 83 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:20:34,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-17 10:20:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-10-17 10:20:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 73 states have internal predecessors, (95), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 10:20:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2022-10-17 10:20:34,659 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 21 [2022-10-17 10:20:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:34,659 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2022-10-17 10:20:34,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2022-10-17 10:20:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-17 10:20:34,662 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:34,662 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:34,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:34,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:20:34,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1954557947, now seen corresponding path program 1 times [2022-10-17 10:20:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877488918] [2022-10-17 10:20:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:34,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:34,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21085150] [2022-10-17 10:20:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:34,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:34,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:34,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:34,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:20:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:34,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:20:34,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:20:35,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:20:35,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:35,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877488918] [2022-10-17 10:20:35,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:35,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21085150] [2022-10-17 10:20:35,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21085150] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:35,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:35,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:20:35,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134634969] [2022-10-17 10:20:35,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:20:35,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:20:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:20:35,014 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:20:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:35,164 INFO L93 Difference]: Finished difference Result 133 states and 172 transitions. [2022-10-17 10:20:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:20:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-10-17 10:20:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:35,167 INFO L225 Difference]: With dead ends: 133 [2022-10-17 10:20:35,167 INFO L226 Difference]: Without dead ends: 121 [2022-10-17 10:20:35,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:20:35,168 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:35,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 98 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:20:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-17 10:20:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2022-10-17 10:20:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 84 states have internal predecessors, (107), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:20:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2022-10-17 10:20:35,246 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 32 [2022-10-17 10:20:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:35,247 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2022-10-17 10:20:35,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:20:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2022-10-17 10:20:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-10-17 10:20:35,257 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:35,257 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:35,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:35,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:35,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:35,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:35,472 INFO L85 PathProgramCache]: Analyzing trace with hash 346264643, now seen corresponding path program 1 times [2022-10-17 10:20:35,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:35,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136754389] [2022-10-17 10:20:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:35,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:35,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:35,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887988431] [2022-10-17 10:20:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:35,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:35,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:35,500 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:35,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:20:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:35,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:20:35,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:20:35,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:20:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 10:20:35,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:35,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136754389] [2022-10-17 10:20:35,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:35,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887988431] [2022-10-17 10:20:35,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887988431] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:20:35,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:20:35,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-10-17 10:20:35,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872509101] [2022-10-17 10:20:35,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:35,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:20:35,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:20:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:20:35,774 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:35,975 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2022-10-17 10:20:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:20:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-10-17 10:20:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:35,978 INFO L225 Difference]: With dead ends: 112 [2022-10-17 10:20:35,978 INFO L226 Difference]: Without dead ends: 92 [2022-10-17 10:20:35,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:20:35,979 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:35,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:20:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-17 10:20:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2022-10-17 10:20:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:20:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-10-17 10:20:35,998 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2022-10-17 10:20:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:35,999 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-10-17 10:20:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:20:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-10-17 10:20:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-17 10:20:36,001 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:36,001 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:36,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-10-17 10:20:36,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:36,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:36,217 INFO L85 PathProgramCache]: Analyzing trace with hash 136508765, now seen corresponding path program 2 times [2022-10-17 10:20:36,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:36,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506087084] [2022-10-17 10:20:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:36,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:36,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188360914] [2022-10-17 10:20:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:20:36,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:36,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:36,261 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:36,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:20:36,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:20:36,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:20:36,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:20:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:36,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:20:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:20:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506087084] [2022-10-17 10:20:36,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188360914] [2022-10-17 10:20:36,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188360914] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:20:36,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:20:36,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-10-17 10:20:36,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944555975] [2022-10-17 10:20:36,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:20:36,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:20:36,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:20:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:20:36,616 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:20:36,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:36,892 INFO L93 Difference]: Finished difference Result 132 states and 169 transitions. [2022-10-17 10:20:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 10:20:36,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 46 [2022-10-17 10:20:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:36,894 INFO L225 Difference]: With dead ends: 132 [2022-10-17 10:20:36,895 INFO L226 Difference]: Without dead ends: 124 [2022-10-17 10:20:36,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:20:36,896 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:36,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 189 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:20:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-10-17 10:20:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-10-17 10:20:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.32) internal successors, (132), 101 states have internal predecessors, (132), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:20:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-10-17 10:20:36,933 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 46 [2022-10-17 10:20:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:36,933 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-10-17 10:20:36,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:20:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-10-17 10:20:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-10-17 10:20:36,937 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:36,937 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:36,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:37,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:37,157 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:37,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1689445411, now seen corresponding path program 3 times [2022-10-17 10:20:37,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:37,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477853542] [2022-10-17 10:20:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:37,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:37,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:37,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465574299] [2022-10-17 10:20:37,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:20:37,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:37,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:37,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:37,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 10:20:37,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-10-17 10:20:37,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:20:37,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 23 conjunts are in the unsatisfiable core [2022-10-17 10:20:37,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:20:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:20:37,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:20:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-10-17 10:20:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477853542] [2022-10-17 10:20:38,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:20:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465574299] [2022-10-17 10:20:38,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465574299] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:20:38,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:20:38,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-10-17 10:20:38,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010058023] [2022-10-17 10:20:38,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:20:38,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:20:38,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:20:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:20:38,234 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-10-17 10:20:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:38,843 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2022-10-17 10:20:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-10-17 10:20:38,844 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 100 [2022-10-17 10:20:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:38,849 INFO L225 Difference]: With dead ends: 242 [2022-10-17 10:20:38,849 INFO L226 Difference]: Without dead ends: 234 [2022-10-17 10:20:38,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=1141, Unknown=0, NotChecked=0, Total=1806 [2022-10-17 10:20:38,852 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 400 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:38,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 348 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:20:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-10-17 10:20:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-10-17 10:20:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 190 states have (on average 1.3263157894736841) internal successors, (252), 191 states have internal predecessors, (252), 22 states have call successors, (22), 21 states have call predecessors, (22), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-10-17 10:20:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 295 transitions. [2022-10-17 10:20:38,912 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 295 transitions. Word has length 100 [2022-10-17 10:20:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:38,913 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 295 transitions. [2022-10-17 10:20:38,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 20 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-10-17 10:20:38,913 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 295 transitions. [2022-10-17 10:20:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-10-17 10:20:38,916 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:38,916 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:38,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-10-17 10:20:39,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:39,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:39,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1595985571, now seen corresponding path program 4 times [2022-10-17 10:20:39,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:39,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804578578] [2022-10-17 10:20:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:39,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:39,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:20:39,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582300522] [2022-10-17 10:20:39,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:20:39,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:20:39,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:20:39,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:20:39,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 10:20:39,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:20:39,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-10-17 10:20:39,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:20:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:20:39,827 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:20:39,827 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:20:39,829 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 10:20:39,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-17 10:20:40,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:20:40,060 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:40,063 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 10:20:40,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 10:20:40 BoogieIcfgContainer [2022-10-17 10:20:40,175 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 10:20:40,176 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 10:20:40,176 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 10:20:40,176 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 10:20:40,177 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:20:20" (3/4) ... [2022-10-17 10:20:40,179 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-10-17 10:20:40,338 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/witness.graphml [2022-10-17 10:20:40,338 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 10:20:40,339 INFO L158 Benchmark]: Toolchain (without parser) took 20685.50ms. Allocated memory was 111.1MB in the beginning and 167.8MB in the end (delta: 56.6MB). Free memory was 70.7MB in the beginning and 137.2MB in the end (delta: -66.5MB). Peak memory consumption was 77.0MB. Max. memory is 16.1GB. [2022-10-17 10:20:40,339 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 111.1MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:20:40,340 INFO L158 Benchmark]: CACSL2BoogieTranslator took 474.52ms. Allocated memory is still 111.1MB. Free memory was 70.5MB in the beginning and 87.6MB in the end (delta: -17.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 10:20:40,340 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.97ms. Allocated memory is still 111.1MB. Free memory was 87.6MB in the beginning and 86.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:20:40,340 INFO L158 Benchmark]: Boogie Preprocessor took 46.65ms. Allocated memory is still 111.1MB. Free memory was 86.0MB in the beginning and 84.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:20:40,341 INFO L158 Benchmark]: RCFGBuilder took 416.55ms. Allocated memory is still 111.1MB. Free memory was 84.8MB in the beginning and 72.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-10-17 10:20:40,341 INFO L158 Benchmark]: TraceAbstraction took 19491.12ms. Allocated memory was 111.1MB in the beginning and 167.8MB in the end (delta: 56.6MB). Free memory was 72.2MB in the beginning and 50.7MB in the end (delta: 21.5MB). Peak memory consumption was 79.2MB. Max. memory is 16.1GB. [2022-10-17 10:20:40,341 INFO L158 Benchmark]: Witness Printer took 162.25ms. Allocated memory is still 167.8MB. Free memory was 50.7MB in the beginning and 137.2MB in the end (delta: -86.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:20:40,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 111.1MB. Free memory is still 87.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 474.52ms. Allocated memory is still 111.1MB. Free memory was 70.5MB in the beginning and 87.6MB in the end (delta: -17.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.97ms. Allocated memory is still 111.1MB. Free memory was 87.6MB in the beginning and 86.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.65ms. Allocated memory is still 111.1MB. Free memory was 86.0MB in the beginning and 84.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 416.55ms. Allocated memory is still 111.1MB. Free memory was 84.8MB in the beginning and 72.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 19491.12ms. Allocated memory was 111.1MB in the beginning and 167.8MB in the end (delta: 56.6MB). Free memory was 72.2MB in the beginning and 50.7MB in the end (delta: 21.5MB). Peak memory consumption was 79.2MB. Max. memory is 16.1GB. * Witness Printer took 162.25ms. Allocated memory is still 167.8MB. Free memory was 50.7MB in the beginning and 137.2MB in the end (delta: -86.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [a=1048576, b=1048576, counter=0, p=1, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=1048576, b=1048576, counter=1, counter++=0, p=1, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=1048576, b=1048576, counter=1, p=1, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=1048576, b=1048576, counter=1, p=1, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=524288, b=524288, counter=1, p=4, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=524288, b=524288, counter=2, counter++=1, p=4, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=524288, b=524288, counter=2, p=4, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=524288, b=524288, counter=2, p=4, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=262144, b=262144, counter=2, p=16, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=262144, b=262144, counter=3, counter++=2, p=16, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=262144, b=262144, counter=3, p=16, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=262144, b=262144, counter=3, p=16, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=131072, b=131072, counter=3, p=64, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=131072, b=131072, counter=4, counter++=3, p=64, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=131072, b=131072, counter=4, p=64, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=131072, b=131072, counter=4, p=64, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=65536, b=65536, counter=4, p=256, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=65536, b=65536, counter=5, counter++=4, p=256, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=65536, b=65536, counter=5, p=256, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=65536, b=65536, counter=5, p=256, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=32768, b=32768, counter=5, p=1024, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=32768, b=32768, counter=6, counter++=5, p=1024, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=32768, b=32768, counter=6, p=1024, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=32768, b=32768, counter=6, p=1024, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=16384, b=16384, counter=6, p=4096, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=16384, b=16384, counter=7, counter++=6, p=4096, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=16384, b=16384, counter=7, p=4096, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=16384, b=16384, counter=7, p=4096, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=8192, b=8192, counter=7, p=16384, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=8192, b=8192, counter=8, counter++=7, p=16384, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=8192, b=8192, counter=8, p=16384, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=8192, b=8192, counter=8, p=16384, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=4096, b=4096, counter=8, p=65536, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=4096, b=4096, counter=9, counter++=8, p=65536, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4096, b=4096, counter=9, p=65536, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=4096, b=4096, counter=9, p=65536, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=2048, b=2048, counter=9, p=262144, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=2048, b=2048, counter=10, counter++=9, p=262144, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=2048, b=2048, counter=10, p=262144, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=2048, b=2048, counter=10, p=262144, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=1024, b=1024, counter=10, p=1048576, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=1024, b=1024, counter=11, counter++=10, p=1048576, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=1024, b=1024, counter=11, p=1048576, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=1024, b=1024, counter=11, p=1048576, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=512, b=512, counter=11, p=4194304, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=512, b=512, counter=12, counter++=11, p=4194304, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=512, b=512, counter=12, p=4194304, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=512, b=512, counter=12, p=4194304, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=256, b=256, counter=12, p=16777216, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=256, b=256, counter=13, counter++=12, p=16777216, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=256, b=256, counter=13, p=16777216, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=256, b=256, counter=13, p=16777216, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=128, b=128, counter=13, p=67108864, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=128, b=128, counter=14, counter++=13, p=67108864, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=128, b=128, counter=14, p=67108864, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=128, b=128, counter=14, p=67108864, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=64, b=64, counter=14, p=268435456, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=64, b=64, counter=15, counter++=14, p=268435456, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=64, b=64, counter=15, p=268435456, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=64, b=64, counter=15, p=268435456, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=32, b=32, counter=15, p=1073741824, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=32, b=32, counter=16, counter++=15, p=1073741824, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=32, b=32, counter=16, p=1073741824, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=32, b=32, counter=16, p=1073741824, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=16, b=16, counter=16, p=4294967296, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=16, b=16, counter=17, counter++=16, p=4294967296, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=16, b=16, counter=17, p=4294967296, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=16, b=16, counter=17, p=4294967296, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=8, b=8, counter=17, p=17179869184, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=8, b=8, counter=18, counter++=17, p=17179869184, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=8, b=8, counter=18, p=17179869184, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=8, b=8, counter=18, p=17179869184, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=4, b=4, counter=18, p=68719476736, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=4, b=4, counter=19, counter++=18, p=68719476736, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=4, b=4, counter=19, p=68719476736, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=4, b=4, counter=19, p=68719476736, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=2, b=2, counter=19, p=274877906944, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=2, b=2, counter=20, counter++=19, p=274877906944, q=0, x=1048576, y=1048576] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [\old(cond)=1, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L34] RET __VERIFIER_assert(q + a * b * p == (long long) x * y) VAL [a=2, b=2, counter=20, p=274877906944, q=0, x=1048576, y=1048576] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [a=2, b=2, counter=20, p=274877906944, q=0, x=1048576, y=1048576] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [a=1, b=1, counter=20, p=1099511627776, q=0, x=1048576, y=1048576] [L33] EXPR counter++ VAL [a=1, b=1, counter=21, counter++=20, p=1099511627776, q=0, x=1048576, y=1048576] [L33] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(q == (long long) x * y) VAL [\old(cond)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.3s, OverallIterations: 12, TraceHistogramMax: 21, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 851 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 848 mSDsluCounter, 1254 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 974 mSDsCounter, 250 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 795 IncrementalHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 250 mSolverCounterUnsat, 280 mSDtfsCounter, 795 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 585 GetRequests, 440 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=11, InterpolantAutomatonStates: 127, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 124 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 523 NumberOfCodeBlocks, 523 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 529 ConstructedInterpolants, 0 QuantifiedInterpolants, 1912 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1168 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 340/1126 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-10-17 10:20:40,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ea58d54-03e1-4e43-8205-a70082d3d167/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE