./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be --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 154556615f003714b5a49b3ebe7e74b2231be519e4b6364e10c3e255a1a8cfe1 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:50:34,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:50:34,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:50:34,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:50:34,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:50:34,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:50:34,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:50:34,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:50:34,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:50:34,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:50:34,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:50:34,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:50:34,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:50:34,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:50:34,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:50:34,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:50:34,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:50:34,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:50:34,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:50:34,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:50:34,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:50:34,376 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:50:34,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:50:34,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:50:34,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:50:34,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:50:34,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:50:34,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:50:34,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:50:34,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:50:34,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:50:34,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:50:34,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:50:34,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:50:34,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:50:34,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:50:34,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:50:34,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:50:34,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:50:34,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:50:34,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:50:34,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:50:34,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:50:34,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:50:34,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:50:34,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:50:34,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:50:34,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:50:34,435 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:50:34,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:50:34,436 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:50:34,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:50:34,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:50:34,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:50:34,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:50:34,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:50:34,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:50:34,437 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:50:34,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:50:34,437 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:50:34,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:50:34,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:50:34,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:50:34,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:50:34,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:50:34,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:50:34,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:50:34,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:50:34,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:50:34,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:50:34,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:50:34,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:50:34,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:50:34,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:50:34,440 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_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 154556615f003714b5a49b3ebe7e74b2231be519e4b6364e10c3e255a1a8cfe1 [2021-10-21 19:50:34,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:50:34,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:50:34,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:50:34,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:50:34,723 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:50:34,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-10-21 19:50:34,804 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/data/d650f5037/24a8ca50b57447dab5cc661de66101b5/FLAG7b6e4f714 [2021-10-21 19:50:35,395 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:50:35,396 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-10-21 19:50:35,403 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/data/d650f5037/24a8ca50b57447dab5cc661de66101b5/FLAG7b6e4f714 [2021-10-21 19:50:35,745 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/data/d650f5037/24a8ca50b57447dab5cc661de66101b5 [2021-10-21 19:50:35,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:50:35,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:50:35,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:50:35,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:50:35,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:50:35,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:50:35" (1/1) ... [2021-10-21 19:50:35,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745419fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:35, skipping insertion in model container [2021-10-21 19:50:35,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:50:35" (1/1) ... [2021-10-21 19:50:35,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:50:35,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:50:36,031 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c[524,537] [2021-10-21 19:50:36,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:50:36,064 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:50:36,077 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound10.c[524,537] [2021-10-21 19:50:36,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:50:36,101 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:50:36,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36 WrapperNode [2021-10-21 19:50:36,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:50:36,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:50:36,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:50:36,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:50:36,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:50:36,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:50:36,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:50:36,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:50:36,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:50:36,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:50:36,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:50:36,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:50:36,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (1/1) ... [2021-10-21 19:50:36,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:50:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:36,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:50:36,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:50:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:50:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:50:36,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:50:36,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:50:36,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:50:36,538 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-21 19:50:36,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:50:36 BoogieIcfgContainer [2021-10-21 19:50:36,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:50:36,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:50:36,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:50:36,548 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:50:36,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:50:35" (1/3) ... [2021-10-21 19:50:36,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ab083c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:50:36, skipping insertion in model container [2021-10-21 19:50:36,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:50:36" (2/3) ... [2021-10-21 19:50:36,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ab083c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:50:36, skipping insertion in model container [2021-10-21 19:50:36,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:50:36" (3/3) ... [2021-10-21 19:50:36,553 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound10.c [2021-10-21 19:50:36,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:50:36,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-21 19:50:36,621 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:50:36,630 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:50:36,631 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-21 19:50:36,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:50:36,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:36,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:36,661 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash 120613195, now seen corresponding path program 1 times [2021-10-21 19:50:36,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:36,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047403802] [2021-10-21 19:50:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:36,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:36,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:36,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047403802] [2021-10-21 19:50:36,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047403802] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:50:36,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:50:36,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:50:36,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507929599] [2021-10-21 19:50:36,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:50:36,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:36,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:50:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:50:36,851 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.619047619047619) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:36,866 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-10-21 19:50:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:50:36,867 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-21 19:50:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:36,876 INFO L225 Difference]: With dead ends: 47 [2021-10-21 19:50:36,877 INFO L226 Difference]: Without dead ends: 21 [2021-10-21 19:50:36,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:50:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-21 19:50:36,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-21 19:50:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-21 19:50:36,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2021-10-21 19:50:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:36,912 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-21 19:50:36,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-21 19:50:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 19:50:36,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:36,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:36,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:50:36,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:36,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:36,915 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-21 19:50:36,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:36,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980693648] [2021-10-21 19:50:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:36,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:36,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:36,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772523082] [2021-10-21 19:50:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:36,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:36,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:36,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:36,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:50:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:50:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:37,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:37,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980693648] [2021-10-21 19:50:37,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:37,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772523082] [2021-10-21 19:50:37,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772523082] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:50:37,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:50:37,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:50:37,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192707545] [2021-10-21 19:50:37,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:50:37,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:50:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:50:37,362 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:37,492 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-10-21 19:50:37,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:50:37,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-21 19:50:37,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:37,495 INFO L225 Difference]: With dead ends: 42 [2021-10-21 19:50:37,496 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:50:37,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:50:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:50:37,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-10-21 19:50:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-21 19:50:37,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2021-10-21 19:50:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:37,512 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-21 19:50:37,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-21 19:50:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 19:50:37,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:37,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:37,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-21 19:50:37,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:37,730 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2021-10-21 19:50:37,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:37,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014424453] [2021-10-21 19:50:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:37,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:37,751 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:37,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108622046] [2021-10-21 19:50:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:37,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:37,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:37,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:37,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:50:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:50:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:37,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:37,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014424453] [2021-10-21 19:50:37,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:37,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108622046] [2021-10-21 19:50:37,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108622046] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:50:37,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:50:37,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:50:37,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157711280] [2021-10-21 19:50:37,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:50:37,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:50:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:50:37,923 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:37,934 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-10-21 19:50:37,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:50:37,935 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-21 19:50:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:37,936 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:50:37,936 INFO L226 Difference]: Without dead ends: 24 [2021-10-21 19:50:37,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:50:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-21 19:50:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-21 19:50:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-21 19:50:37,941 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2021-10-21 19:50:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:37,941 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-21 19:50:37,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-21 19:50:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:50:37,942 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:37,943 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:37,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:38,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-21 19:50:38,158 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:38,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2021-10-21 19:50:38,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:38,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947177445] [2021-10-21 19:50:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:38,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:38,173 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:38,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562606484] [2021-10-21 19:50:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:38,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:38,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:38,180 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:38,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:50:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:50:38,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:38,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:38,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947177445] [2021-10-21 19:50:38,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:38,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562606484] [2021-10-21 19:50:38,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562606484] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:50:38,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:50:38,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:50:38,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061832647] [2021-10-21 19:50:38,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:50:38,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:50:38,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:50:38,891 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:40,163 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-10-21 19:50:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:50:40,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-21 19:50:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:40,165 INFO L225 Difference]: With dead ends: 52 [2021-10-21 19:50:40,165 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:50:40,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 974.4ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:50:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:50:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2021-10-21 19:50:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-10-21 19:50:40,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 11 [2021-10-21 19:50:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:40,174 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-10-21 19:50:40,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-10-21 19:50:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:50:40,175 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:40,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:40,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:40,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:40,397 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash 965004492, now seen corresponding path program 1 times [2021-10-21 19:50:40,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:40,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694279796] [2021-10-21 19:50:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:40,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:40,414 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:40,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080216713] [2021-10-21 19:50:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:40,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:40,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:40,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:40,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:50:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:40,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:50:40,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:40,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:40,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694279796] [2021-10-21 19:50:40,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:40,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080216713] [2021-10-21 19:50:40,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080216713] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:50:40,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:50:40,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:50:40,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851250042] [2021-10-21 19:50:40,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:50:40,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:40,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:50:40,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:50:40,601 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:40,770 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2021-10-21 19:50:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:50:40,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-21 19:50:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:40,772 INFO L225 Difference]: With dead ends: 57 [2021-10-21 19:50:40,772 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 19:50:40,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:50:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 19:50:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2021-10-21 19:50:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.457142857142857) internal successors, (51), 37 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2021-10-21 19:50:40,784 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 13 [2021-10-21 19:50:40,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:40,784 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2021-10-21 19:50:40,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2021-10-21 19:50:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:50:40,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:40,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:40,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:41,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:41,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:41,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2021-10-21 19:50:41,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:41,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214195854] [2021-10-21 19:50:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:41,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:41,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:41,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706801779] [2021-10-21 19:50:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:41,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:41,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:41,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:50:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 19:50:41,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:44,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:44,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214195854] [2021-10-21 19:50:44,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:44,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706801779] [2021-10-21 19:50:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706801779] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:50:44,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:50:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:50:44,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175016790] [2021-10-21 19:50:44,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:50:44,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:50:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:50:44,158 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:44,634 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2021-10-21 19:50:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:50:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-21 19:50:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:44,637 INFO L225 Difference]: With dead ends: 68 [2021-10-21 19:50:44,637 INFO L226 Difference]: Without dead ends: 66 [2021-10-21 19:50:44,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:50:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-21 19:50:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 43. [2021-10-21 19:50:44,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.45) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-10-21 19:50:44,644 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 13 [2021-10-21 19:50:44,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:44,645 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-10-21 19:50:44,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-10-21 19:50:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:50:44,646 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:44,646 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:44,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:44,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:44,854 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2021-10-21 19:50:44,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:44,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633260492] [2021-10-21 19:50:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:44,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:44,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:44,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582672325] [2021-10-21 19:50:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:44,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:44,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:44,869 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:44,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:50:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:44,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:50:44,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:45,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:45,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633260492] [2021-10-21 19:50:45,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:45,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582672325] [2021-10-21 19:50:45,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582672325] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:50:45,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:50:45,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 19:50:45,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524775370] [2021-10-21 19:50:45,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:50:45,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:45,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:50:45,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:50:45,049 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:45,070 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-10-21 19:50:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:50:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-21 19:50:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:45,073 INFO L225 Difference]: With dead ends: 57 [2021-10-21 19:50:45,073 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:50:45,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:50:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:50:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-21 19:50:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 48 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2021-10-21 19:50:45,094 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 14 [2021-10-21 19:50:45,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:45,095 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2021-10-21 19:50:45,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:45,095 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2021-10-21 19:50:45,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 19:50:45,096 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:45,096 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:45,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:45,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:45,310 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:45,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1175899963, now seen corresponding path program 1 times [2021-10-21 19:50:45,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:45,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025318780] [2021-10-21 19:50:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:45,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:45,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:45,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692213774] [2021-10-21 19:50:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:45,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:45,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:45,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:45,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:50:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:45,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:50:45,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:45,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:45,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025318780] [2021-10-21 19:50:45,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:45,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692213774] [2021-10-21 19:50:45,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692213774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:50:45,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:50:45,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:50:45,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996270008] [2021-10-21 19:50:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:50:45,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:50:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:50:45,625 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:45,899 INFO L93 Difference]: Finished difference Result 63 states and 85 transitions. [2021-10-21 19:50:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:50:45,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-21 19:50:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:45,900 INFO L225 Difference]: With dead ends: 63 [2021-10-21 19:50:45,900 INFO L226 Difference]: Without dead ends: 61 [2021-10-21 19:50:45,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:50:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-21 19:50:45,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-10-21 19:50:45,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2021-10-21 19:50:45,909 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 14 [2021-10-21 19:50:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:45,909 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2021-10-21 19:50:45,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:45,910 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2021-10-21 19:50:45,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:50:45,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:45,911 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:45,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:46,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:46,134 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2112377150, now seen corresponding path program 1 times [2021-10-21 19:50:46,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:46,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603677057] [2021-10-21 19:50:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:46,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:46,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:46,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994023508] [2021-10-21 19:50:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:46,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:46,155 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:46,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:50:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:46,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:50:46,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:46,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:46,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603677057] [2021-10-21 19:50:46,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:46,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994023508] [2021-10-21 19:50:46,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994023508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:50:46,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:50:46,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:50:46,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016030565] [2021-10-21 19:50:46,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:50:46,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:50:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:50:46,531 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:46,763 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2021-10-21 19:50:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:50:46,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-21 19:50:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:46,764 INFO L225 Difference]: With dead ends: 70 [2021-10-21 19:50:46,764 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 19:50:46,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:50:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 19:50:46,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-10-21 19:50:46,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.38) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-10-21 19:50:46,771 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 15 [2021-10-21 19:50:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:46,772 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-10-21 19:50:46,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:46,772 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-10-21 19:50:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:50:46,773 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:46,773 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:46,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:46,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:46,998 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash -2114224192, now seen corresponding path program 1 times [2021-10-21 19:50:46,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:46,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905694256] [2021-10-21 19:50:46,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:46,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:47,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:47,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984941313] [2021-10-21 19:50:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:47,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:47,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:47,011 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:47,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:50:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:47,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:50:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:47,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:47,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905694256] [2021-10-21 19:50:47,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:47,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984941313] [2021-10-21 19:50:47,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984941313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:50:47,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:50:47,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:50:47,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074237438] [2021-10-21 19:50:47,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:50:47,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:47,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:50:47,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:50:47,389 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:47,683 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2021-10-21 19:50:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:50:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-21 19:50:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:47,689 INFO L225 Difference]: With dead ends: 71 [2021-10-21 19:50:47,689 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 19:50:47,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:50:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 19:50:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2021-10-21 19:50:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-10-21 19:50:47,696 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 15 [2021-10-21 19:50:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:47,697 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-10-21 19:50:47,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-10-21 19:50:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:50:47,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:47,698 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:47,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:47,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:50:47,922 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:47,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:47,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1951591878, now seen corresponding path program 1 times [2021-10-21 19:50:47,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:47,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266195064] [2021-10-21 19:50:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:47,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:47,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:47,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325210274] [2021-10-21 19:50:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:47,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:47,957 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:47,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:50:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:48,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:50:48,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:48,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:48,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266195064] [2021-10-21 19:50:48,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:48,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325210274] [2021-10-21 19:50:48,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325210274] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:50:48,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:50:48,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:50:48,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106631885] [2021-10-21 19:50:48,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:50:48,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:50:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:50:48,247 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:48,350 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-10-21 19:50:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:50:48,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-21 19:50:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:48,352 INFO L225 Difference]: With dead ends: 80 [2021-10-21 19:50:48,352 INFO L226 Difference]: Without dead ends: 76 [2021-10-21 19:50:48,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:50:48,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-21 19:50:48,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-10-21 19:50:48,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-10-21 19:50:48,360 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 16 [2021-10-21 19:50:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:48,361 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-10-21 19:50:48,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-10-21 19:50:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:50:48,362 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:48,362 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:48,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:48,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:50:48,584 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:48,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1461153292, now seen corresponding path program 2 times [2021-10-21 19:50:48,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:48,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279931645] [2021-10-21 19:50:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:48,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:48,594 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:48,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904784010] [2021-10-21 19:50:48,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:50:48,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:48,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:48,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:48,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:50:48,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:50:48,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:50:48,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-21 19:50:48,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:50:53,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:53,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279931645] [2021-10-21 19:50:53,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:53,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904784010] [2021-10-21 19:50:53,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904784010] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:50:53,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:50:53,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:50:53,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996201480] [2021-10-21 19:50:53,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:50:53,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:50:53,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:50:53,017 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:50:53,920 INFO L93 Difference]: Finished difference Result 83 states and 110 transitions. [2021-10-21 19:50:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:50:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-21 19:50:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:50:53,924 INFO L225 Difference]: With dead ends: 83 [2021-10-21 19:50:53,924 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 19:50:53,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:50:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 19:50:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-10-21 19:50:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 59 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2021-10-21 19:50:53,933 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 18 [2021-10-21 19:50:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:50:53,933 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2021-10-21 19:50:53,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:50:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2021-10-21 19:50:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:50:53,935 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:50:53,935 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:50:53,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:50:54,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:50:54,136 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:50:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:50:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash 38054995, now seen corresponding path program 1 times [2021-10-21 19:50:54,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:50:54,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302563456] [2021-10-21 19:50:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:54,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:50:54,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:50:54,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959437045] [2021-10-21 19:50:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:50:54,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:50:54,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:50:54,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:50:54,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:50:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:50:54,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:50:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:50:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:50:54,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:50:54,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302563456] [2021-10-21 19:50:54,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:50:54,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959437045] [2021-10-21 19:50:54,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959437045] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:50:54,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:50:54,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:50:54,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557723412] [2021-10-21 19:50:54,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:50:54,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:50:54,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:50:54,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:50:54,609 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:51:01,101 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2021-10-21 19:51:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:51:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-21 19:51:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:51:01,102 INFO L225 Difference]: With dead ends: 68 [2021-10-21 19:51:01,103 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 19:51:01,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:51:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 19:51:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2021-10-21 19:51:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2021-10-21 19:51:01,110 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 18 [2021-10-21 19:51:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:51:01,110 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-10-21 19:51:01,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2021-10-21 19:51:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:51:01,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:51:01,125 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:51:01,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:51:01,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:51:01,326 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:51:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:51:01,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1948915952, now seen corresponding path program 2 times [2021-10-21 19:51:01,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:51:01,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664080058] [2021-10-21 19:51:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:01,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:51:01,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:51:01,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245081786] [2021-10-21 19:51:01,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:51:01,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:51:01,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:51:01,338 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:51:01,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:51:01,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:51:01,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:51:01,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:51:01,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:51:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:51:01,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:51:01,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664080058] [2021-10-21 19:51:01,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:51:01,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245081786] [2021-10-21 19:51:01,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245081786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:01,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:51:01,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:51:01,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322546173] [2021-10-21 19:51:01,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:51:01,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:51:01,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:51:01,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:51:01,596 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:51:01,631 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2021-10-21 19:51:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:51:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-21 19:51:01,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:51:01,632 INFO L225 Difference]: With dead ends: 75 [2021-10-21 19:51:01,632 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 19:51:01,633 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:51:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 19:51:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-21 19:51:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 60 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2021-10-21 19:51:01,641 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 19 [2021-10-21 19:51:01,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:51:01,641 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2021-10-21 19:51:01,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:01,642 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2021-10-21 19:51:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:51:01,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:51:01,643 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:51:01,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:51:01,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:51:01,857 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:51:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:51:01,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1865923190, now seen corresponding path program 1 times [2021-10-21 19:51:01,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:51:01,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63816253] [2021-10-21 19:51:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:01,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:51:01,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:51:01,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282749710] [2021-10-21 19:51:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:01,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:51:01,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:51:01,866 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:51:01,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:51:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:51:02,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-21 19:51:02,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:51:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:51:05,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:51:05,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63816253] [2021-10-21 19:51:05,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:51:05,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282749710] [2021-10-21 19:51:05,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282749710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:05,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:51:05,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:51:05,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469730158] [2021-10-21 19:51:05,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:51:05,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:51:05,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:51:05,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:51:05,401 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:08,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:51:08,293 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2021-10-21 19:51:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:51:08,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-21 19:51:08,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:51:08,294 INFO L225 Difference]: With dead ends: 98 [2021-10-21 19:51:08,294 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 19:51:08,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2232.7ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:51:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 19:51:08,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-10-21 19:51:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.34375) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:08,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-10-21 19:51:08,303 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 19 [2021-10-21 19:51:08,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:51:08,303 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-10-21 19:51:08,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:51:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-10-21 19:51:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:51:08,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:51:08,304 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:51:08,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:51:08,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:51:08,505 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:51:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:51:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash -752867060, now seen corresponding path program 2 times [2021-10-21 19:51:08,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:51:08,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500736371] [2021-10-21 19:51:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:51:08,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:51:08,520 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:51:08,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952706310] [2021-10-21 19:51:08,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:51:08,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:51:08,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:51:08,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:51:08,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:51:08,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:51:08,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:51:08,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-21 19:51:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:51:24,880 WARN L207 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 34 [2021-10-21 19:51:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:51:47,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:51:47,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500736371] [2021-10-21 19:51:47,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:51:47,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952706310] [2021-10-21 19:51:47,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952706310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:51:47,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:51:47,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:51:47,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727026488] [2021-10-21 19:51:47,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:51:47,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:51:47,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:51:47,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:51:47,164 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:02,949 WARN L207 SmtUtils]: Spent 12.38 s on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-10-21 19:52:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:06,061 INFO L93 Difference]: Finished difference Result 81 states and 105 transitions. [2021-10-21 19:52:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:52:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-21 19:52:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:06,063 INFO L225 Difference]: With dead ends: 81 [2021-10-21 19:52:06,063 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 19:52:06,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 20213.6ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:52:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 19:52:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-10-21 19:52:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.34375) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:06,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-10-21 19:52:06,070 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 19 [2021-10-21 19:52:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:06,070 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-10-21 19:52:06,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-10-21 19:52:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:52:06,071 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:06,071 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:06,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:06,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:52:06,271 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:06,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1919614381, now seen corresponding path program 1 times [2021-10-21 19:52:06,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:06,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648881062] [2021-10-21 19:52:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:06,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:06,281 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:06,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593918670] [2021-10-21 19:52:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:06,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:06,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:06,286 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:06,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:52:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:06,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 19:52:06,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:07,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:07,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648881062] [2021-10-21 19:52:07,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:07,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593918670] [2021-10-21 19:52:07,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593918670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:07,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:07,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:07,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015083859] [2021-10-21 19:52:07,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:07,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:07,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:07,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:07,456 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:08,626 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2021-10-21 19:52:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:52:08,627 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 19:52:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:08,629 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:52:08,629 INFO L226 Difference]: Without dead ends: 88 [2021-10-21 19:52:08,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-21 19:52:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2021-10-21 19:52:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-10-21 19:52:08,638 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2021-10-21 19:52:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:08,638 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-10-21 19:52:08,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-10-21 19:52:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:52:08,640 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:08,640 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:08,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:08,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:52:08,854 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:08,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:08,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1921461423, now seen corresponding path program 1 times [2021-10-21 19:52:08,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:08,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641634991] [2021-10-21 19:52:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:08,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:08,870 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:08,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034374274] [2021-10-21 19:52:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:08,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:08,885 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:08,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:52:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:09,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 19:52:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:09,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:09,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641634991] [2021-10-21 19:52:09,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:09,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034374274] [2021-10-21 19:52:09,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034374274] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:09,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:09,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:09,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702420465] [2021-10-21 19:52:09,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:09,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:09,830 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:10,351 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-10-21 19:52:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:52:10,352 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 19:52:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:10,353 INFO L225 Difference]: With dead ends: 91 [2021-10-21 19:52:10,353 INFO L226 Difference]: Without dead ends: 89 [2021-10-21 19:52:10,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-21 19:52:10,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-21 19:52:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.338235294117647) internal successors, (91), 70 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2021-10-21 19:52:10,359 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 20 [2021-10-21 19:52:10,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:10,360 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2021-10-21 19:52:10,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2021-10-21 19:52:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:52:10,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:10,360 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:10,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:10,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:52:10,574 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:10,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1781077366, now seen corresponding path program 2 times [2021-10-21 19:52:10,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:10,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189794789] [2021-10-21 19:52:10,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:10,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:10,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:10,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731869522] [2021-10-21 19:52:10,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:10,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:10,605 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:10,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:52:10,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:10,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:52:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:10,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:10,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189794789] [2021-10-21 19:52:10,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:10,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731869522] [2021-10-21 19:52:10,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731869522] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:10,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:10,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:52:10,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214123360] [2021-10-21 19:52:10,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:52:10,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:52:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:52:10,995 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:11,034 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2021-10-21 19:52:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:52:11,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 19:52:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:11,035 INFO L225 Difference]: With dead ends: 124 [2021-10-21 19:52:11,036 INFO L226 Difference]: Without dead ends: 97 [2021-10-21 19:52:11,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:52:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-21 19:52:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2021-10-21 19:52:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.382716049382716) internal successors, (112), 83 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 112 transitions. [2021-10-21 19:52:11,046 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 112 transitions. Word has length 20 [2021-10-21 19:52:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:11,046 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 112 transitions. [2021-10-21 19:52:11,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:11,046 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 112 transitions. [2021-10-21 19:52:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:52:11,047 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:11,047 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:11,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:11,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:11,247 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:11,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:11,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2083698570, now seen corresponding path program 1 times [2021-10-21 19:52:11,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:11,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409739524] [2021-10-21 19:52:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:11,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:11,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:11,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493031737] [2021-10-21 19:52:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:11,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:11,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:11,261 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:11,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:52:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:11,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:52:11,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:11,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409739524] [2021-10-21 19:52:11,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493031737] [2021-10-21 19:52:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493031737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:11,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:11,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:11,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419952304] [2021-10-21 19:52:11,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:11,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:11,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:11,738 INFO L87 Difference]: Start difference. First operand 84 states and 112 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:11,953 INFO L93 Difference]: Finished difference Result 114 states and 145 transitions. [2021-10-21 19:52:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:52:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 19:52:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:11,956 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:52:11,956 INFO L226 Difference]: Without dead ends: 104 [2021-10-21 19:52:11,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:52:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-21 19:52:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2021-10-21 19:52:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.323076923076923) internal successors, (86), 67 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:11,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-10-21 19:52:11,966 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 20 [2021-10-21 19:52:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:11,967 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-10-21 19:52:11,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:11,967 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-10-21 19:52:11,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:52:11,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:11,968 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:11,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:12,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:12,182 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:12,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:12,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2043615771, now seen corresponding path program 2 times [2021-10-21 19:52:12,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:12,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016027833] [2021-10-21 19:52:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:12,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:12,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:12,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36032475] [2021-10-21 19:52:12,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:12,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:12,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:12,207 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:12,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:52:12,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:12,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:12,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:52:12,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:20,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:20,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016027833] [2021-10-21 19:52:20,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:20,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36032475] [2021-10-21 19:52:20,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36032475] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:20,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:20,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:52:20,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542596008] [2021-10-21 19:52:20,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:52:20,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:20,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:52:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:20,385 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:21,980 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2021-10-21 19:52:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:52:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 19:52:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:21,981 INFO L225 Difference]: With dead ends: 93 [2021-10-21 19:52:21,981 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 19:52:21,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 865.7ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:52:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 19:52:21,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2021-10-21 19:52:21,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 72 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-10-21 19:52:21,991 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 20 [2021-10-21 19:52:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:21,991 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-10-21 19:52:21,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:21,991 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-10-21 19:52:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:52:21,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:21,992 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:22,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-21 19:52:22,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:52:22,198 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:22,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1650588761, now seen corresponding path program 2 times [2021-10-21 19:52:22,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:22,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073945374] [2021-10-21 19:52:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:22,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:22,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:22,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836823229] [2021-10-21 19:52:22,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:22,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:22,207 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:22,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:52:22,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:22,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:22,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 19:52:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:30,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:30,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073945374] [2021-10-21 19:52:30,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:30,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836823229] [2021-10-21 19:52:30,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836823229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:30,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:30,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:52:30,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516690695] [2021-10-21 19:52:30,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:52:30,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:30,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:52:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:30,114 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:30,712 INFO L93 Difference]: Finished difference Result 115 states and 149 transitions. [2021-10-21 19:52:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:52:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-21 19:52:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:30,714 INFO L225 Difference]: With dead ends: 115 [2021-10-21 19:52:30,714 INFO L226 Difference]: Without dead ends: 89 [2021-10-21 19:52:30,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:52:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-21 19:52:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-10-21 19:52:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 73 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-10-21 19:52:30,725 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 20 [2021-10-21 19:52:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:30,726 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-10-21 19:52:30,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:30,726 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-10-21 19:52:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:52:30,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:30,727 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:30,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:30,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:30,934 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash 710606163, now seen corresponding path program 1 times [2021-10-21 19:52:30,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:30,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099486676] [2021-10-21 19:52:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:30,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:30,941 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:30,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102502295] [2021-10-21 19:52:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:30,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:30,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:30,961 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:30,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:52:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:31,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:52:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:31,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:31,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099486676] [2021-10-21 19:52:31,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:31,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102502295] [2021-10-21 19:52:31,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102502295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:31,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:31,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:52:31,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516638437] [2021-10-21 19:52:31,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:52:31,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:31,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:52:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:52:31,641 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:31,707 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2021-10-21 19:52:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:52:31,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-21 19:52:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:31,709 INFO L225 Difference]: With dead ends: 130 [2021-10-21 19:52:31,710 INFO L226 Difference]: Without dead ends: 99 [2021-10-21 19:52:31,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:52:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-21 19:52:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2021-10-21 19:52:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-10-21 19:52:31,722 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 21 [2021-10-21 19:52:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:31,722 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-10-21 19:52:31,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-10-21 19:52:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:52:31,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:31,725 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:31,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:31,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:31,950 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1155385553, now seen corresponding path program 2 times [2021-10-21 19:52:31,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:31,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669773906] [2021-10-21 19:52:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:31,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:31,960 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:31,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658270665] [2021-10-21 19:52:31,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:31,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:31,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:31,963 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:31,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:52:32,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:32,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:52:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:32,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:32,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669773906] [2021-10-21 19:52:32,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:32,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658270665] [2021-10-21 19:52:32,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658270665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:32,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:32,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:52:32,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013213934] [2021-10-21 19:52:32,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:52:32,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:32,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:52:32,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:32,622 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:32,978 INFO L93 Difference]: Finished difference Result 161 states and 187 transitions. [2021-10-21 19:52:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:52:32,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-21 19:52:32,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:32,980 INFO L225 Difference]: With dead ends: 161 [2021-10-21 19:52:32,980 INFO L226 Difference]: Without dead ends: 137 [2021-10-21 19:52:32,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:52:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-21 19:52:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 86. [2021-10-21 19:52:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 85 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2021-10-21 19:52:32,996 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 21 [2021-10-21 19:52:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:32,997 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2021-10-21 19:52:32,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2021-10-21 19:52:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:52:32,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:32,997 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:33,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:33,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:52:33,202 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1546643436, now seen corresponding path program 2 times [2021-10-21 19:52:33,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:33,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851291909] [2021-10-21 19:52:33,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:33,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:33,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:33,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343270409] [2021-10-21 19:52:33,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:33,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:33,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:33,221 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:33,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:52:33,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:33,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:52:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:33,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:33,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851291909] [2021-10-21 19:52:33,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:33,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343270409] [2021-10-21 19:52:33,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343270409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:33,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:33,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:33,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280543327] [2021-10-21 19:52:33,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:33,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:33,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:33,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:33,925 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:34,215 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2021-10-21 19:52:34,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:52:34,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-21 19:52:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:34,216 INFO L225 Difference]: With dead ends: 141 [2021-10-21 19:52:34,216 INFO L226 Difference]: Without dead ends: 111 [2021-10-21 19:52:34,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:52:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-21 19:52:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2021-10-21 19:52:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 69 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2021-10-21 19:52:34,228 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 22 [2021-10-21 19:52:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:34,229 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2021-10-21 19:52:34,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2021-10-21 19:52:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:52:34,229 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:34,229 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:34,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-21 19:52:34,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:52:34,430 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1544796394, now seen corresponding path program 1 times [2021-10-21 19:52:34,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:34,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724727489] [2021-10-21 19:52:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:34,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:34,443 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:34,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629630667] [2021-10-21 19:52:34,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:34,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:34,444 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:34,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:52:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:34,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:52:34,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:35,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:35,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724727489] [2021-10-21 19:52:35,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:35,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629630667] [2021-10-21 19:52:35,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629630667] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:35,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:35,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:35,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580979584] [2021-10-21 19:52:35,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:35,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:35,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:35,273 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:35,847 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2021-10-21 19:52:35,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:52:35,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-21 19:52:35,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:35,848 INFO L225 Difference]: With dead ends: 118 [2021-10-21 19:52:35,848 INFO L226 Difference]: Without dead ends: 116 [2021-10-21 19:52:35,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:35,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-21 19:52:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2021-10-21 19:52:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-10-21 19:52:35,859 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 22 [2021-10-21 19:52:35,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:35,859 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-10-21 19:52:35,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:35,860 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-10-21 19:52:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:52:35,860 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:35,860 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:35,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:36,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:52:36,072 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:36,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1286630956, now seen corresponding path program 2 times [2021-10-21 19:52:36,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:36,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940613065] [2021-10-21 19:52:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:36,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:36,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:36,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62322633] [2021-10-21 19:52:36,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:36,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:36,087 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:36,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:52:36,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:36,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:36,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:52:36,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:36,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:36,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940613065] [2021-10-21 19:52:36,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:36,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62322633] [2021-10-21 19:52:36,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62322633] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:52:36,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:52:36,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:52:36,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652338957] [2021-10-21 19:52:36,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:52:36,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:36,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:52:36,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:52:36,604 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:36,648 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2021-10-21 19:52:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:52:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-21 19:52:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:36,649 INFO L225 Difference]: With dead ends: 140 [2021-10-21 19:52:36,649 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:52:36,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:52:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:52:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-10-21 19:52:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-10-21 19:52:36,661 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 22 [2021-10-21 19:52:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:36,661 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-10-21 19:52:36,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-10-21 19:52:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 19:52:36,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:36,662 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:36,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:36,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:52:36,878 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:36,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1685529819, now seen corresponding path program 3 times [2021-10-21 19:52:36,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:36,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383766245] [2021-10-21 19:52:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:36,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:36,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:36,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239644379] [2021-10-21 19:52:36,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:52:36,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:36,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:36,902 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:36,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:52:37,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:52:37,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:37,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:52:37,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:52:37,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:37,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383766245] [2021-10-21 19:52:37,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:37,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239644379] [2021-10-21 19:52:37,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239644379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:37,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:37,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:52:37,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654054165] [2021-10-21 19:52:37,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:52:37,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:37,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:52:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:52:37,493 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:38,264 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2021-10-21 19:52:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:52:38,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-21 19:52:38,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:38,265 INFO L225 Difference]: With dead ends: 73 [2021-10-21 19:52:38,265 INFO L226 Difference]: Without dead ends: 71 [2021-10-21 19:52:38,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:38,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-21 19:52:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2021-10-21 19:52:38,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-10-21 19:52:38,278 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 23 [2021-10-21 19:52:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:38,278 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-10-21 19:52:38,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-10-21 19:52:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:52:38,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:38,279 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:38,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-21 19:52:38,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:38,479 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:38,480 INFO L82 PathProgramCache]: Analyzing trace with hash 711789089, now seen corresponding path program 3 times [2021-10-21 19:52:38,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:38,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358903903] [2021-10-21 19:52:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:38,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:38,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:38,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067604158] [2021-10-21 19:52:38,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:52:38,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:38,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:38,491 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:38,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:52:38,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:52:38,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:52:38,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:39,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:39,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358903903] [2021-10-21 19:52:39,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:39,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067604158] [2021-10-21 19:52:39,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067604158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:39,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:39,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:52:39,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973280717] [2021-10-21 19:52:39,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:52:39,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:52:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:52:39,049 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:39,116 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-10-21 19:52:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:52:39,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-21 19:52:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:39,117 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:52:39,117 INFO L226 Difference]: Without dead ends: 82 [2021-10-21 19:52:39,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-21 19:52:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-21 19:52:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.2375) internal successors, (99), 81 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2021-10-21 19:52:39,135 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 24 [2021-10-21 19:52:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:39,136 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2021-10-21 19:52:39,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2021-10-21 19:52:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 19:52:39,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:39,137 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:39,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:39,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:52:39,343 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash -388617808, now seen corresponding path program 4 times [2021-10-21 19:52:39,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:39,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430944198] [2021-10-21 19:52:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:39,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:39,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:39,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431470382] [2021-10-21 19:52:39,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:52:39,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:39,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:39,354 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:39,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:52:39,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:52:39,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:52:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:39,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:39,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430944198] [2021-10-21 19:52:39,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:39,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431470382] [2021-10-21 19:52:39,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431470382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:39,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:39,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:52:39,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399455257] [2021-10-21 19:52:39,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:52:39,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:39,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:52:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:52:39,957 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:40,021 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2021-10-21 19:52:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:52:40,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-21 19:52:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:40,022 INFO L225 Difference]: With dead ends: 109 [2021-10-21 19:52:40,023 INFO L226 Difference]: Without dead ends: 101 [2021-10-21 19:52:40,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:52:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-21 19:52:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-21 19:52:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 99 states have (on average 1.2323232323232323) internal successors, (122), 100 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2021-10-21 19:52:40,055 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 29 [2021-10-21 19:52:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:40,056 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2021-10-21 19:52:40,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:40,056 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2021-10-21 19:52:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:52:40,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:40,057 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:40,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:40,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:40,270 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1639093375, now seen corresponding path program 5 times [2021-10-21 19:52:40,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:40,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271605796] [2021-10-21 19:52:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:40,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:40,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:40,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390452665] [2021-10-21 19:52:40,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:52:40,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:40,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:40,281 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:40,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:52:40,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 19:52:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:52:40,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:40,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:40,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271605796] [2021-10-21 19:52:40,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:40,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390452665] [2021-10-21 19:52:40,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390452665] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:40,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:40,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:52:40,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318381372] [2021-10-21 19:52:40,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:52:40,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:40,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:52:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:52:40,886 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:40,952 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2021-10-21 19:52:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:52:40,952 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-21 19:52:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:40,953 INFO L225 Difference]: With dead ends: 128 [2021-10-21 19:52:40,953 INFO L226 Difference]: Without dead ends: 120 [2021-10-21 19:52:40,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:52:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-21 19:52:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-10-21 19:52:40,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 118 states have (on average 1.228813559322034) internal successors, (145), 119 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2021-10-21 19:52:40,975 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 34 [2021-10-21 19:52:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:40,976 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2021-10-21 19:52:40,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2021-10-21 19:52:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:52:40,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:40,977 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:41,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:41,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-21 19:52:41,182 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:41,182 INFO L82 PathProgramCache]: Analyzing trace with hash 182166608, now seen corresponding path program 6 times [2021-10-21 19:52:41,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:41,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393156504] [2021-10-21 19:52:41,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:41,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:41,196 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:41,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137077158] [2021-10-21 19:52:41,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:52:41,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:41,197 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:41,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:52:41,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 19:52:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:52:41,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:41,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:41,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393156504] [2021-10-21 19:52:41,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:41,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137077158] [2021-10-21 19:52:41,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137077158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:41,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:41,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:52:41,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626128645] [2021-10-21 19:52:41,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:52:41,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:41,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:52:41,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:52:41,923 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:42,029 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2021-10-21 19:52:42,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:52:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-21 19:52:42,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:42,031 INFO L225 Difference]: With dead ends: 147 [2021-10-21 19:52:42,031 INFO L226 Difference]: Without dead ends: 139 [2021-10-21 19:52:42,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:52:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-21 19:52:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-21 19:52:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 137 states have (on average 1.2262773722627738) internal successors, (168), 138 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2021-10-21 19:52:42,065 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 39 [2021-10-21 19:52:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:42,065 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2021-10-21 19:52:42,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2021-10-21 19:52:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:52:42,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:42,067 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:42,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:42,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:42,282 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash 933991649, now seen corresponding path program 7 times [2021-10-21 19:52:42,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:42,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569362383] [2021-10-21 19:52:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:42,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:42,291 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:42,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822401495] [2021-10-21 19:52:42,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:52:42,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:42,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:42,293 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:42,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 19:52:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:52:42,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:52:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:42,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:42,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569362383] [2021-10-21 19:52:42,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:42,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822401495] [2021-10-21 19:52:42,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822401495] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:42,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:42,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:52:42,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109511556] [2021-10-21 19:52:42,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:52:42,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:42,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:52:42,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:52:42,999 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:43,102 INFO L93 Difference]: Finished difference Result 166 states and 201 transitions. [2021-10-21 19:52:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:52:43,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-21 19:52:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:43,104 INFO L225 Difference]: With dead ends: 166 [2021-10-21 19:52:43,104 INFO L226 Difference]: Without dead ends: 158 [2021-10-21 19:52:43,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:52:43,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-21 19:52:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-10-21 19:52:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.2243589743589745) internal successors, (191), 157 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 191 transitions. [2021-10-21 19:52:43,142 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 191 transitions. Word has length 44 [2021-10-21 19:52:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:43,143 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 191 transitions. [2021-10-21 19:52:43,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 191 transitions. [2021-10-21 19:52:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:52:43,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:43,144 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:43,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:43,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:52:43,370 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash 918574832, now seen corresponding path program 8 times [2021-10-21 19:52:43,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:43,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182521667] [2021-10-21 19:52:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:43,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:43,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:43,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694275243] [2021-10-21 19:52:43,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:52:43,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:43,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:43,385 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:43,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 19:52:43,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:52:43,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:52:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:52:43,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:52:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:52:44,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:52:44,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182521667] [2021-10-21 19:52:44,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:52:44,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694275243] [2021-10-21 19:52:44,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694275243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:52:44,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:52:44,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:52:44,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282979786] [2021-10-21 19:52:44,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:52:44,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:52:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:52:44,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:52:44,116 INFO L87 Difference]: Start difference. First operand 158 states and 191 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:52:44,251 INFO L93 Difference]: Finished difference Result 185 states and 224 transitions. [2021-10-21 19:52:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:52:44,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-21 19:52:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:52:44,253 INFO L225 Difference]: With dead ends: 185 [2021-10-21 19:52:44,253 INFO L226 Difference]: Without dead ends: 177 [2021-10-21 19:52:44,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:52:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-21 19:52:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2021-10-21 19:52:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.2228571428571429) internal successors, (214), 176 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:44,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 214 transitions. [2021-10-21 19:52:44,310 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 214 transitions. Word has length 49 [2021-10-21 19:52:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:52:44,310 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 214 transitions. [2021-10-21 19:52:44,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:52:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 214 transitions. [2021-10-21 19:52:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 19:52:44,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:52:44,312 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:52:44,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-21 19:52:44,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:52:44,526 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:52:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:52:44,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1444051391, now seen corresponding path program 9 times [2021-10-21 19:52:44,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:52:44,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164523776] [2021-10-21 19:52:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:52:44,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:52:44,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:52:44,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806353520] [2021-10-21 19:52:44,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:52:44,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:52:44,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:52:44,542 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:52:44,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 19:59:46,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-21 19:59:46,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:59:46,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 19:59:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:59:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:59:46,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:59:46,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164523776] [2021-10-21 19:59:46,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:59:46,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806353520] [2021-10-21 19:59:46,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806353520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:59:46,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:59:46,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-21 19:59:46,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280811110] [2021-10-21 19:59:46,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:59:46,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:59:46,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:59:46,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:59:46,442 INFO L87 Difference]: Start difference. First operand 177 states and 214 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:59:46,593 INFO L93 Difference]: Finished difference Result 204 states and 247 transitions. [2021-10-21 19:59:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:59:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-21 19:59:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:59:46,596 INFO L225 Difference]: With dead ends: 204 [2021-10-21 19:59:46,596 INFO L226 Difference]: Without dead ends: 196 [2021-10-21 19:59:46,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:59:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-21 19:59:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-10-21 19:59:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 1.2216494845360826) internal successors, (237), 195 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 237 transitions. [2021-10-21 19:59:46,642 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 237 transitions. Word has length 54 [2021-10-21 19:59:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:59:46,643 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 237 transitions. [2021-10-21 19:59:46,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:59:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 237 transitions. [2021-10-21 19:59:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-21 19:59:46,644 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:59:46,644 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:59:46,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:59:46,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 19:59:46,844 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:59:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:59:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -388087408, now seen corresponding path program 10 times [2021-10-21 19:59:46,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:59:46,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121813112] [2021-10-21 19:59:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:59:46,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:59:46,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:59:46,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234163492] [2021-10-21 19:59:46,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:59:46,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:59:46,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:59:46,863 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:59:46,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 19:59:47,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:59:47,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 19:59:47,518 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:59:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:59:47,625 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:59:47,625 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:59:47,626 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:59:47,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:59:47,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:59:47,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:59:47,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:59:47,864 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:59:47,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:59:47 BoogieIcfgContainer [2021-10-21 19:59:47,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:59:47,957 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:59:47,957 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:59:47,958 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:59:47,958 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:50:36" (3/4) ... [2021-10-21 19:59:47,961 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:59:48,100 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:59:48,100 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:59:48,102 INFO L168 Benchmark]: Toolchain (without parser) took 552351.82 ms. Allocated memory was 83.9 MB in the beginning and 218.1 MB in the end (delta: 134.2 MB). Free memory was 48.8 MB in the beginning and 67.9 MB in the end (delta: -19.0 MB). Peak memory consumption was 115.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:48,102 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 57.1 MB in the beginning and 57.0 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:59:48,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.96 ms. Allocated memory was 83.9 MB in the beginning and 102.8 MB in the end (delta: 18.9 MB). Free memory was 48.6 MB in the beginning and 77.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:48,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.83 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 75.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:59:48,104 INFO L168 Benchmark]: Boogie Preprocessor took 29.63 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 74.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:48,105 INFO L168 Benchmark]: RCFGBuilder took 363.08 ms. Allocated memory is still 102.8 MB. Free memory was 74.4 MB in the beginning and 63.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:48,106 INFO L168 Benchmark]: TraceAbstraction took 551413.63 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 63.0 MB in the beginning and 73.6 MB in the end (delta: -10.5 MB). Peak memory consumption was 139.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:48,106 INFO L168 Benchmark]: Witness Printer took 143.40 ms. Allocated memory is still 218.1 MB. Free memory was 73.6 MB in the beginning and 67.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 19:59:48,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 57.1 MB in the beginning and 57.0 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.96 ms. Allocated memory was 83.9 MB in the beginning and 102.8 MB in the end (delta: 18.9 MB). Free memory was 48.6 MB in the beginning and 77.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.83 ms. Allocated memory is still 102.8 MB. Free memory was 77.1 MB in the beginning and 75.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.63 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 74.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 363.08 ms. Allocated memory is still 102.8 MB. Free memory was 74.4 MB in the beginning and 63.5 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 551413.63 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 63.0 MB in the beginning and 73.6 MB in the end (delta: -10.5 MB). Peak memory consumption was 139.4 MB. Max. memory is 16.1 GB. * Witness Printer took 143.40 ms. Allocated memory is still 218.1 MB. Free memory was 73.6 MB in the beginning and 67.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=2] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=3] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=3] [L33] EXPR counter++ VAL [counter=4] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=4] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=4] [L33] EXPR counter++ VAL [counter=5] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=5] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=5] [L33] EXPR counter++ VAL [counter=6] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=6] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=6] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=6] [L33] EXPR counter++ VAL [counter=7] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=7] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=7] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=7] [L33] EXPR counter++ VAL [counter=8] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=8] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=8] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=8] [L33] EXPR counter++ VAL [counter=9] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=9] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=9] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=9] [L33] EXPR counter++ VAL [counter=10] [L33] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=10] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=10] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=10] [L33] EXPR counter++ VAL [counter=11] [L33] COND FALSE !(counter++<10) [L12] COND TRUE !(cond) VAL [counter=11] [L14] reach_error() VAL [counter=11] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 551243.4ms, OverallIterations: 36, TraceHistogramMax: 11, EmptinessCheckTime: 48.9ms, AutomataDifference: 39299.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 744 SDtfs, 2004 SDslu, 1927 SDs, 0 SdLazy, 2207 SolverSat, 398 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 19647.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 857 GetRequests, 520 SyntacticMatches, 1 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 28115.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=196occurred in iteration=35, InterpolantAutomatonStates: 323, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 509.9ms AutomataMinimizationTime, 35 MinimizatonAttempts, 501 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 202.0ms SsaConstructionTime, 422162.7ms SatisfiabilityAnalysisTime, 70867.9ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 802 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 718 ConstructedInterpolants, 2 QuantifiedInterpolants, 5886 SizeOfPredicates, 233 NumberOfNonLiveVariables, 4005 ConjunctsInSsa, 670 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 83/890 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! [2021-10-21 19:59:48,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe29ad61-dcf3-47f3-97d4-de600bb6bbf9/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...