./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.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_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/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_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/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_475c83ff-c620-46c3-adc6-9656dd37f35e/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 77987d39218daa3d8ca19fe9337f6493b276d704fa95c2d6fb7800ec30efdcea ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 20:06:24,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:06:24,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:06:24,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:06:24,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:06:24,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:06:24,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:06:24,442 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:06:24,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:06:24,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:06:24,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:06:24,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:06:24,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:06:24,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:06:24,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:06:24,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:06:24,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:06:24,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:06:24,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:06:24,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:06:24,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:06:24,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:06:24,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:06:24,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:06:24,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:06:24,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:06:24,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:06:24,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:06:24,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:06:24,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:06:24,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:06:24,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:06:24,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:06:24,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:06:24,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:06:24,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:06:24,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:06:24,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:06:24,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:06:24,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:06:24,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:06:24,503 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 20:06:24,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:06:24,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:06:24,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:06:24,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:06:24,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:06:24,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:06:24,534 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:06:24,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:06:24,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:06:24,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:06:24,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:06:24,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:06:24,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 20:06:24,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:06:24,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 20:06:24,537 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:06:24,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:06:24,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:06:24,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 20:06:24,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:06:24,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:06:24,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:06:24,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:06:24,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:06:24,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:06:24,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 20:06:24,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:06:24,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:06:24,540 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 20:06:24,542 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 20:06:24,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 20:06:24,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:06:24,543 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_475c83ff-c620-46c3-adc6-9656dd37f35e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77987d39218daa3d8ca19fe9337f6493b276d704fa95c2d6fb7800ec30efdcea [2021-10-21 20:06:24,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:06:24,862 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:06:24,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:06:24,866 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:06:24,867 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:06:24,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-10-21 20:06:24,947 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/data/bd516727f/5f79d74c9d7e4e048a1f6c2196bb46d7/FLAG41ff87731 [2021-10-21 20:06:25,486 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:06:25,487 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-10-21 20:06:25,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/data/bd516727f/5f79d74c9d7e4e048a1f6c2196bb46d7/FLAG41ff87731 [2021-10-21 20:06:25,831 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/data/bd516727f/5f79d74c9d7e4e048a1f6c2196bb46d7 [2021-10-21 20:06:25,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:06:25,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:06:25,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:06:25,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:06:25,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:06:25,840 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:06:25" (1/1) ... [2021-10-21 20:06:25,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e5b650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:25, skipping insertion in model container [2021-10-21 20:06:25,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:06:25" (1/1) ... [2021-10-21 20:06:25,848 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:06:25,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:06:26,001 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_475c83ff-c620-46c3-adc6-9656dd37f35e/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c[489,502] [2021-10-21 20:06:26,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:06:26,027 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:06:26,039 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_475c83ff-c620-46c3-adc6-9656dd37f35e/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c[489,502] [2021-10-21 20:06:26,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:06:26,060 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:06:26,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26 WrapperNode [2021-10-21 20:06:26,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:06:26,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:06:26,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:06:26,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:06:26,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:06:26,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:06:26,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:06:26,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:06:26,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:06:26,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:06:26,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:06:26,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:06:26,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (1/1) ... [2021-10-21 20:06:26,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:06:26,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:26,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:06:26,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:06:26,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 20:06:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:06:26,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:06:26,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:06:26,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:06:26,477 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-21 20:06:26,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:06:26 BoogieIcfgContainer [2021-10-21 20:06:26,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:06:26,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:06:26,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:06:26,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:06:26,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:06:25" (1/3) ... [2021-10-21 20:06:26,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5bb685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:06:26, skipping insertion in model container [2021-10-21 20:06:26,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:06:26" (2/3) ... [2021-10-21 20:06:26,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c5bb685 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:06:26, skipping insertion in model container [2021-10-21 20:06:26,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:06:26" (3/3) ... [2021-10-21 20:06:26,488 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound5.c [2021-10-21 20:06:26,492 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:06:26,493 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-21 20:06:26,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:06:26,577 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 20:06:26,577 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-21 20:06:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 1.606060606060606) internal successors, (53), 40 states have internal predecessors, (53), 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 20:06:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:06:26,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:26,602 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:26,602 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:26,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:26,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1236199694, now seen corresponding path program 1 times [2021-10-21 20:06:26,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:26,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561290715] [2021-10-21 20:06:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:26,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:26,818 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 20:06:26,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:26,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561290715] [2021-10-21 20:06:26,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561290715] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:26,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:26,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 20:06:26,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795974635] [2021-10-21 20:06:26,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 20:06:26,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 20:06:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 20:06:26,864 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 1.606060606060606) internal successors, (53), 40 states have internal predecessors, (53), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 20:06:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:26,889 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-10-21 20:06:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 20:06:26,891 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-10-21 20:06:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:26,903 INFO L225 Difference]: With dead ends: 79 [2021-10-21 20:06:26,903 INFO L226 Difference]: Without dead ends: 37 [2021-10-21 20:06:26,907 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 20:06:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-21 20:06:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-21 20:06:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3) internal successors, (39), 36 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 20:06:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-10-21 20:06:26,953 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 10 [2021-10-21 20:06:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:26,956 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-10-21 20:06:26,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 20:06:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-10-21 20:06:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 20:06:26,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:26,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:26,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:06:26,961 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-21 20:06:26,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:26,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882144886] [2021-10-21 20:06:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:26,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:27,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:27,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522884611] [2021-10-21 20:06:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:27,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:27,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:27,013 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:27,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:06:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:27,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:06:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:27,329 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 20:06:27,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:27,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882144886] [2021-10-21 20:06:27,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:27,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522884611] [2021-10-21 20:06:27,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522884611] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:27,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:27,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:06:27,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870764415] [2021-10-21 20:06:27,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:06:27,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:06:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:27,342 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 20:06:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:27,467 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-10-21 20:06:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:06:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-10-21 20:06:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:27,472 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:06:27,475 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 20:06:27,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 20:06:27,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-10-21 20:06:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 51 states have internal predecessors, (61), 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 20:06:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-10-21 20:06:27,487 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 10 [2021-10-21 20:06:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:27,488 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-10-21 20:06:27,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 20:06:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-10-21 20:06:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:06:27,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:27,490 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:27,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:27,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:27,709 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:27,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1507402239, now seen corresponding path program 1 times [2021-10-21 20:06:27,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:27,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886307649] [2021-10-21 20:06:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:27,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:27,799 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 20:06:27,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:27,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886307649] [2021-10-21 20:06:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886307649] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:27,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:27,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:06:27,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125689929] [2021-10-21 20:06:27,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:06:27,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:27,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:06:27,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:27,806 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:27,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:27,838 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-10-21 20:06:27,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:06:27,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-21 20:06:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:27,844 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:06:27,844 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 20:06:27,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:27,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 20:06:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-21 20:06:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 53 states have internal predecessors, (63), 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 20:06:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-10-21 20:06:27,865 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 11 [2021-10-21 20:06:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:27,866 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-10-21 20:06:27,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:06:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-10-21 20:06:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 20:06:27,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:27,867 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:27,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:06:27,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:27,871 INFO L82 PathProgramCache]: Analyzing trace with hash 515817425, now seen corresponding path program 1 times [2021-10-21 20:06:27,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:27,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869428433] [2021-10-21 20:06:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:27,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:27,904 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:27,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55474886] [2021-10-21 20:06:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:27,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:27,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:27,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:27,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:06:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:28,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:06:28,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:28,361 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 20:06:28,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:28,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869428433] [2021-10-21 20:06:28,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:28,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55474886] [2021-10-21 20:06:28,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55474886] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:28,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:28,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-21 20:06:28,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793002087] [2021-10-21 20:06:28,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:06:28,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:28,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:06:28,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:28,365 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 20:06:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:28,622 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-10-21 20:06:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-21 20:06:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:28,624 INFO L225 Difference]: With dead ends: 66 [2021-10-21 20:06:28,625 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 20:06:28,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:06:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 20:06:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-10-21 20:06:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 53 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 20:06:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-10-21 20:06:28,647 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 12 [2021-10-21 20:06:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:28,648 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-10-21 20:06:28,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 20:06:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-10-21 20:06:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:06:28,650 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:28,650 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:28,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:28,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:28,851 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:28,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1779462740, now seen corresponding path program 1 times [2021-10-21 20:06:28,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:28,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410014311] [2021-10-21 20:06:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:28,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:28,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:28,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441072420] [2021-10-21 20:06:28,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:28,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:28,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:28,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:28,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:06:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:28,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 20:06:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:29,190 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 20:06:29,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:29,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410014311] [2021-10-21 20:06:29,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:29,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441072420] [2021-10-21 20:06:29,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441072420] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:29,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:29,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:06:29,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201812823] [2021-10-21 20:06:29,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:29,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:29,196 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 20:06:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:29,320 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-10-21 20:06:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 20:06:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:29,322 INFO L225 Difference]: With dead ends: 104 [2021-10-21 20:06:29,322 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 20:06:29,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 20:06:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2021-10-21 20:06:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 73 states have (on average 1.3424657534246576) internal successors, (98), 79 states have internal predecessors, (98), 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 20:06:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-10-21 20:06:29,333 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 14 [2021-10-21 20:06:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:29,337 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-10-21 20:06:29,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 20:06:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-10-21 20:06:29,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:06:29,338 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:29,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:29,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:29,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:29,552 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash -801918668, now seen corresponding path program 1 times [2021-10-21 20:06:29,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:29,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389140120] [2021-10-21 20:06:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:29,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:29,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:29,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443997466] [2021-10-21 20:06:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:29,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:29,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:29,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:29,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:06:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:06:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:29,755 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 20:06:29,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:29,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389140120] [2021-10-21 20:06:29,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:29,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443997466] [2021-10-21 20:06:29,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443997466] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:29,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:29,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:06:29,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462658490] [2021-10-21 20:06:29,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:06:29,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:29,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:06:29,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:29,761 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 20:06:29,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:29,824 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2021-10-21 20:06:29,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:06:29,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 17 [2021-10-21 20:06:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:29,831 INFO L225 Difference]: With dead ends: 108 [2021-10-21 20:06:29,832 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 20:06:29,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 20:06:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-10-21 20:06:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 85 states have internal predecessors, (103), 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 20:06:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 103 transitions. [2021-10-21 20:06:29,859 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 103 transitions. Word has length 17 [2021-10-21 20:06:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:29,860 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 103 transitions. [2021-10-21 20:06:29,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 20:06:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 103 transitions. [2021-10-21 20:06:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:06:29,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:29,864 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:29,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:30,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 20:06:30,089 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1844536457, now seen corresponding path program 1 times [2021-10-21 20:06:30,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:30,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115881528] [2021-10-21 20:06:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:30,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:30,116 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:30,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818583205] [2021-10-21 20:06:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:30,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:30,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:30,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:30,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:06:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:06:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:30,435 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 20:06:30,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:30,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115881528] [2021-10-21 20:06:30,436 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:30,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818583205] [2021-10-21 20:06:30,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818583205] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:06:30,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:06:30,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:06:30,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052601257] [2021-10-21 20:06:30,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:30,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:30,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:30,442 INFO L87 Difference]: Start difference. First operand 86 states and 103 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 20:06:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:30,618 INFO L93 Difference]: Finished difference Result 131 states and 149 transitions. [2021-10-21 20:06:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:06:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 20:06:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:30,621 INFO L225 Difference]: With dead ends: 131 [2021-10-21 20:06:30,621 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 20:06:30,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 20:06:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 93. [2021-10-21 20:06:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 92 states have internal predecessors, (111), 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 20:06:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2021-10-21 20:06:30,647 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 19 [2021-10-21 20:06:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:30,648 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2021-10-21 20:06:30,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 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 20:06:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2021-10-21 20:06:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 20:06:30,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:30,649 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:30,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:30,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:30,876 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1795587856, now seen corresponding path program 1 times [2021-10-21 20:06:30,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:30,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595705207] [2021-10-21 20:06:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:30,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:30,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:30,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250991737] [2021-10-21 20:06:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:30,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:30,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:30,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:30,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:06:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:06:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:06:31,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:31,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595705207] [2021-10-21 20:06:31,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:31,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250991737] [2021-10-21 20:06:31,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250991737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:31,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:31,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 20:06:31,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529342938] [2021-10-21 20:06:31,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:06:31,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:06:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:06:31,172 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 20:06:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:31,253 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-10-21 20:06:31,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:06:31,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 19 [2021-10-21 20:06:31,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:31,256 INFO L225 Difference]: With dead ends: 103 [2021-10-21 20:06:31,257 INFO L226 Difference]: Without dead ends: 93 [2021-10-21 20:06:31,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:31,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-21 20:06:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2021-10-21 20:06:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 80 states have (on average 1.275) internal successors, (102), 86 states have internal predecessors, (102), 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 20:06:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-10-21 20:06:31,281 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 19 [2021-10-21 20:06:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:31,282 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-10-21 20:06:31,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 20:06:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-10-21 20:06:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 20:06:31,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:31,291 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:31,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:31,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:31,492 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:31,492 INFO L82 PathProgramCache]: Analyzing trace with hash 171335487, now seen corresponding path program 1 times [2021-10-21 20:06:31,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:31,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113599871] [2021-10-21 20:06:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:31,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:31,505 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:31,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350822706] [2021-10-21 20:06:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:31,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:31,507 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:31,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:06:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:31,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:06:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:31,681 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 20:06:31,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:31,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113599871] [2021-10-21 20:06:31,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:31,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350822706] [2021-10-21 20:06:31,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350822706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:31,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:31,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-21 20:06:31,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794012552] [2021-10-21 20:06:31,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:06:31,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:31,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:06:31,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:06:31,684 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 20:06:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:31,711 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-10-21 20:06:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:06:31,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 20:06:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:31,713 INFO L225 Difference]: With dead ends: 109 [2021-10-21 20:06:31,713 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 20:06:31,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:31,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 20:06:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-10-21 20:06:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 90 states have internal predecessors, (106), 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 20:06:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2021-10-21 20:06:31,724 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 20 [2021-10-21 20:06:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:31,724 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2021-10-21 20:06:31,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 20:06:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2021-10-21 20:06:31,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:06:31,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:31,725 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:31,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:31,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-21 20:06:31,949 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1017079379, now seen corresponding path program 1 times [2021-10-21 20:06:31,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:31,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488293314] [2021-10-21 20:06:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:31,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:31,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:31,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425219461] [2021-10-21 20:06:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:31,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:31,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:31,973 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:31,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:06:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:32,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 20:06:32,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:32,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:32,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488293314] [2021-10-21 20:06:32,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:32,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425219461] [2021-10-21 20:06:32,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425219461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:32,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:32,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 20:06:32,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379114995] [2021-10-21 20:06:32,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:06:32,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:06:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:32,513 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 20:06:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:32,810 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2021-10-21 20:06:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:06:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 20:06:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:32,814 INFO L225 Difference]: With dead ends: 133 [2021-10-21 20:06:32,814 INFO L226 Difference]: Without dead ends: 131 [2021-10-21 20:06:32,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:06:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-21 20:06:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2021-10-21 20:06:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 93 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 20:06:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2021-10-21 20:06:32,823 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 21 [2021-10-21 20:06:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:32,824 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2021-10-21 20:06:32,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 20:06:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2021-10-21 20:06:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-21 20:06:32,825 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:32,825 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:32,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:33,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:33,045 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1159045544, now seen corresponding path program 1 times [2021-10-21 20:06:33,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:33,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422153654] [2021-10-21 20:06:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:33,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:33,058 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:33,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237881917] [2021-10-21 20:06:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:33,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:33,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:33,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:33,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:06:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:33,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 20:06:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:33,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:33,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422153654] [2021-10-21 20:06:33,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:33,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237881917] [2021-10-21 20:06:33,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237881917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:33,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:33,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:06:33,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532532451] [2021-10-21 20:06:33,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:06:33,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:33,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:06:33,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:33,688 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 20:06:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:34,250 INFO L93 Difference]: Finished difference Result 150 states and 172 transitions. [2021-10-21 20:06:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 20:06:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 20:06:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:34,252 INFO L225 Difference]: With dead ends: 150 [2021-10-21 20:06:34,252 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 20:06:34,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:06:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 20:06:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-10-21 20:06:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.2654867256637168) internal successors, (143), 119 states have internal predecessors, (143), 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 20:06:34,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2021-10-21 20:06:34,288 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 23 [2021-10-21 20:06:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:34,288 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2021-10-21 20:06:34,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 20:06:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2021-10-21 20:06:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:06:34,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:34,291 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:34,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:34,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 20:06:34,514 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:34,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:34,514 INFO L82 PathProgramCache]: Analyzing trace with hash -559475920, now seen corresponding path program 1 times [2021-10-21 20:06:34,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:34,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591597823] [2021-10-21 20:06:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:34,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:34,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:34,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274540939] [2021-10-21 20:06:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:34,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:34,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:34,531 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:34,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 20:06:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:34,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:06:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:35,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:35,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591597823] [2021-10-21 20:06:35,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:35,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274540939] [2021-10-21 20:06:35,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274540939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:35,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:35,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:06:35,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642068629] [2021-10-21 20:06:35,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:35,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:35,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:35,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:35,098 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 20:06:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:35,256 INFO L93 Difference]: Finished difference Result 157 states and 183 transitions. [2021-10-21 20:06:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) Word has length 28 [2021-10-21 20:06:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:35,259 INFO L225 Difference]: With dead ends: 157 [2021-10-21 20:06:35,259 INFO L226 Difference]: Without dead ends: 153 [2021-10-21 20:06:35,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-21 20:06:35,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 132. [2021-10-21 20:06:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 125 states have (on average 1.272) internal successors, (159), 131 states have internal predecessors, (159), 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 20:06:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 159 transitions. [2021-10-21 20:06:35,275 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 159 transitions. Word has length 28 [2021-10-21 20:06:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:35,276 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 159 transitions. [2021-10-21 20:06:35,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 20:06:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 159 transitions. [2021-10-21 20:06:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:06:35,277 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:35,277 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:35,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:35,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:35,501 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:35,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1572440212, now seen corresponding path program 2 times [2021-10-21 20:06:35,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:35,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094158738] [2021-10-21 20:06:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:35,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:35,537 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:35,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27029294] [2021-10-21 20:06:35,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:06:35,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:35,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:35,539 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:35,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 20:06:35,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:06:35,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:06:35,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 20:06:35,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:36,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:36,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094158738] [2021-10-21 20:06:36,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:36,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27029294] [2021-10-21 20:06:36,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27029294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:36,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:36,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:06:36,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280146740] [2021-10-21 20:06:36,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:36,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:36,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:36,125 INFO L87 Difference]: Start difference. First operand 132 states and 159 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 20:06:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:36,285 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2021-10-21 20:06:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:36,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) Word has length 28 [2021-10-21 20:06:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:36,287 INFO L225 Difference]: With dead ends: 161 [2021-10-21 20:06:36,287 INFO L226 Difference]: Without dead ends: 151 [2021-10-21 20:06:36,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-21 20:06:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2021-10-21 20:06:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 133 states have (on average 1.2706766917293233) internal successors, (169), 139 states have internal predecessors, (169), 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 20:06:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 169 transitions. [2021-10-21 20:06:36,302 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 169 transitions. Word has length 28 [2021-10-21 20:06:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:36,303 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 169 transitions. [2021-10-21 20:06:36,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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 20:06:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 169 transitions. [2021-10-21 20:06:36,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-21 20:06:36,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:36,304 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:36,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:36,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:36,521 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:36,522 INFO L82 PathProgramCache]: Analyzing trace with hash -221158463, now seen corresponding path program 2 times [2021-10-21 20:06:36,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:36,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130313935] [2021-10-21 20:06:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:36,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:36,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:36,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619233124] [2021-10-21 20:06:36,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:06:36,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:36,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:36,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:36,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 20:06:36,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:06:36,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:06:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:06:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:36,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:36,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130313935] [2021-10-21 20:06:36,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:36,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619233124] [2021-10-21 20:06:36,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619233124] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:36,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:36,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 20:06:36,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916589345] [2021-10-21 20:06:36,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:36,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:36,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:36,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:36,888 INFO L87 Difference]: Start difference. First operand 140 states and 169 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 20:06:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:36,929 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2021-10-21 20:06:36,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:36,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 20:06:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:36,931 INFO L225 Difference]: With dead ends: 162 [2021-10-21 20:06:36,931 INFO L226 Difference]: Without dead ends: 144 [2021-10-21 20:06:36,931 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:06:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-21 20:06:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-21 20:06:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 143 states have internal predecessors, (171), 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 20:06:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 171 transitions. [2021-10-21 20:06:36,953 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 171 transitions. Word has length 29 [2021-10-21 20:06:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:36,954 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 171 transitions. [2021-10-21 20:06:36,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 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 20:06:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 171 transitions. [2021-10-21 20:06:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:06:36,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:36,955 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:36,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:37,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 20:06:37,171 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:37,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1734668817, now seen corresponding path program 2 times [2021-10-21 20:06:37,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:37,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417367191] [2021-10-21 20:06:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:37,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:37,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:37,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643289747] [2021-10-21 20:06:37,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:06:37,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:37,199 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:37,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:06:37,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:06:37,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:06:37,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 20:06:37,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:38,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:38,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417367191] [2021-10-21 20:06:38,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:38,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643289747] [2021-10-21 20:06:38,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643289747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:38,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:38,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:06:38,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428175512] [2021-10-21 20:06:38,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:06:38,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:06:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:06:38,158 INFO L87 Difference]: Start difference. First operand 144 states and 171 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 20:06:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:38,463 INFO L93 Difference]: Finished difference Result 186 states and 216 transitions. [2021-10-21 20:06:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:06:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 30 [2021-10-21 20:06:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:38,466 INFO L225 Difference]: With dead ends: 186 [2021-10-21 20:06:38,467 INFO L226 Difference]: Without dead ends: 184 [2021-10-21 20:06:38,469 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:06:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-21 20:06:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2021-10-21 20:06:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 140 states have (on average 1.2428571428571429) internal successors, (174), 146 states have internal predecessors, (174), 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 20:06:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2021-10-21 20:06:38,487 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 30 [2021-10-21 20:06:38,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:38,489 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2021-10-21 20:06:38,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 20:06:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2021-10-21 20:06:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:06:38,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:38,493 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:38,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:38,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 20:06:38,709 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:38,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash 713600463, now seen corresponding path program 1 times [2021-10-21 20:06:38,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:38,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682012535] [2021-10-21 20:06:38,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:38,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:38,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:38,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691014353] [2021-10-21 20:06:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:38,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:38,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:38,723 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:38,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:06:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-21 20:06:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:39,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:39,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682012535] [2021-10-21 20:06:39,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:39,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691014353] [2021-10-21 20:06:39,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691014353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:39,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:39,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 20:06:39,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620622552] [2021-10-21 20:06:39,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 20:06:39,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:39,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 20:06:39,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:39,946 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 20:06:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:40,268 INFO L93 Difference]: Finished difference Result 183 states and 212 transitions. [2021-10-21 20:06:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:06:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 30 [2021-10-21 20:06:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:40,271 INFO L225 Difference]: With dead ends: 183 [2021-10-21 20:06:40,271 INFO L226 Difference]: Without dead ends: 181 [2021-10-21 20:06:40,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:06:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-21 20:06:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 147. [2021-10-21 20:06:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 140 states have (on average 1.2357142857142858) internal successors, (173), 146 states have internal predecessors, (173), 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 20:06:40,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2021-10-21 20:06:40,290 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 30 [2021-10-21 20:06:40,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:40,290 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2021-10-21 20:06:40,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 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 20:06:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2021-10-21 20:06:40,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 20:06:40,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:40,292 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:40,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:40,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 20:06:40,499 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1249637014, now seen corresponding path program 1 times [2021-10-21 20:06:40,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:40,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552438112] [2021-10-21 20:06:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:40,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:40,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:40,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944154765] [2021-10-21 20:06:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:40,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:40,514 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:40,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:06:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:06:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 20:06:40,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:41,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:41,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552438112] [2021-10-21 20:06:41,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:41,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944154765] [2021-10-21 20:06:41,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944154765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:41,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:41,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:06:41,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659331121] [2021-10-21 20:06:41,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:41,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:41,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:41,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:41,535 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 20:06:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:41,753 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2021-10-21 20:06:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 32 [2021-10-21 20:06:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:41,755 INFO L225 Difference]: With dead ends: 191 [2021-10-21 20:06:41,755 INFO L226 Difference]: Without dead ends: 179 [2021-10-21 20:06:41,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-10-21 20:06:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2021-10-21 20:06:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 132 states have (on average 1.2348484848484849) internal successors, (163), 138 states have internal predecessors, (163), 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 20:06:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2021-10-21 20:06:41,773 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 32 [2021-10-21 20:06:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:41,774 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2021-10-21 20:06:41,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 20:06:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2021-10-21 20:06:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 20:06:41,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:41,776 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:41,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:41,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 20:06:41,981 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash -744507692, now seen corresponding path program 2 times [2021-10-21 20:06:41,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:41,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284739608] [2021-10-21 20:06:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:41,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:42,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:42,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893457089] [2021-10-21 20:06:42,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:06:42,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:42,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:42,004 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:42,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 20:06:42,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:06:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:06:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 20:06:42,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:06:42,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:42,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284739608] [2021-10-21 20:06:42,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:42,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893457089] [2021-10-21 20:06:42,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893457089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:42,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:42,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:06:42,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977613576] [2021-10-21 20:06:42,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:06:42,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:42,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:06:42,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:06:42,871 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 20:06:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:06:43,259 INFO L93 Difference]: Finished difference Result 195 states and 226 transitions. [2021-10-21 20:06:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 20:06:43,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 32 [2021-10-21 20:06:43,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:06:43,262 INFO L225 Difference]: With dead ends: 195 [2021-10-21 20:06:43,262 INFO L226 Difference]: Without dead ends: 183 [2021-10-21 20:06:43,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:06:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-10-21 20:06:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 146. [2021-10-21 20:06:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 139 states have (on average 1.2302158273381294) internal successors, (171), 145 states have internal predecessors, (171), 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 20:06:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2021-10-21 20:06:43,306 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 32 [2021-10-21 20:06:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:06:43,307 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2021-10-21 20:06:43,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 20:06:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2021-10-21 20:06:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:06:43,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:06:43,308 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:06:43,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:06:43,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 20:06:43,518 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:06:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:06:43,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1488876978, now seen corresponding path program 3 times [2021-10-21 20:06:43,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:06:43,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201379488] [2021-10-21 20:06:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:06:43,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:06:43,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:06:43,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179489993] [2021-10-21 20:06:43,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:06:43,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:06:43,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:06:43,553 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:06:43,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 20:06:43,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:06:43,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:06:43,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 20:06:43,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:06:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 20:06:46,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:06:46,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201379488] [2021-10-21 20:06:46,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:06:46,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179489993] [2021-10-21 20:06:46,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179489993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:06:46,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:06:46,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-21 20:06:46,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757520960] [2021-10-21 20:06:46,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 20:06:46,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:06:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 20:06:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:06:46,171 INFO L87 Difference]: Start difference. First operand 146 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 20:06:53,758 WARN L207 SmtUtils]: Spent 5.04 s on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-10-21 20:06:59,083 WARN L207 SmtUtils]: Spent 5.23 s on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-10-21 20:07:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:43,138 INFO L93 Difference]: Finished difference Result 194 states and 219 transitions. [2021-10-21 20:07:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 20:07:43,140 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 37 [2021-10-21 20:07:43,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:43,141 INFO L225 Difference]: With dead ends: 194 [2021-10-21 20:07:43,141 INFO L226 Difference]: Without dead ends: 190 [2021-10-21 20:07:43,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 27924.6ms TimeCoverageRelationStatistics Valid=169, Invalid=427, Unknown=4, NotChecked=0, Total=600 [2021-10-21 20:07:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-21 20:07:43,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2021-10-21 20:07:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 147 states have (on average 1.2380952380952381) internal successors, (182), 153 states have internal predecessors, (182), 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 20:07:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 182 transitions. [2021-10-21 20:07:43,172 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 182 transitions. Word has length 37 [2021-10-21 20:07:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:43,173 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 182 transitions. [2021-10-21 20:07:43,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 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 20:07:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 182 transitions. [2021-10-21 20:07:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:07:43,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:43,174 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:43,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:43,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:43,375 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:07:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash 475912686, now seen corresponding path program 4 times [2021-10-21 20:07:43,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:43,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437131233] [2021-10-21 20:07:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:43,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:43,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:07:43,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554892252] [2021-10-21 20:07:43,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:07:43,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:43,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:43,410 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:43,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 20:07:44,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:07:44,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:07:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:07:45,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:45,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437131233] [2021-10-21 20:07:45,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:07:45,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554892252] [2021-10-21 20:07:45,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554892252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:45,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:45,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:07:45,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353669231] [2021-10-21 20:07:45,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:07:45,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:07:45,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:07:45,052 INFO L87 Difference]: Start difference. First operand 154 states and 182 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 20:07:45,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:45,716 INFO L93 Difference]: Finished difference Result 192 states and 223 transitions. [2021-10-21 20:07:45,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:07:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 37 [2021-10-21 20:07:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:45,718 INFO L225 Difference]: With dead ends: 192 [2021-10-21 20:07:45,718 INFO L226 Difference]: Without dead ends: 182 [2021-10-21 20:07:45,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:07:45,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-10-21 20:07:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2021-10-21 20:07:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 161 states have (on average 1.236024844720497) internal successors, (199), 167 states have internal predecessors, (199), 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 20:07:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2021-10-21 20:07:45,751 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 37 [2021-10-21 20:07:45,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:45,751 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2021-10-21 20:07:45,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 20:07:45,751 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2021-10-21 20:07:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:07:45,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:45,752 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:45,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:45,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:45,965 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:07:45,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:45,966 INFO L82 PathProgramCache]: Analyzing trace with hash 477759728, now seen corresponding path program 5 times [2021-10-21 20:07:45,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:45,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180324058] [2021-10-21 20:07:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:45,966 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:45,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:07:45,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658017245] [2021-10-21 20:07:45,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:07:45,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:45,978 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:45,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 20:07:47,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 20:07:47,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:47,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:07:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:07:48,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:48,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180324058] [2021-10-21 20:07:48,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:07:48,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658017245] [2021-10-21 20:07:48,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658017245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:48,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:48,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:07:48,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186453025] [2021-10-21 20:07:48,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:07:48,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:07:48,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:07:48,292 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 20:07:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:49,062 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2021-10-21 20:07:49,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:07:49,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 37 [2021-10-21 20:07:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:49,064 INFO L225 Difference]: With dead ends: 201 [2021-10-21 20:07:49,065 INFO L226 Difference]: Without dead ends: 197 [2021-10-21 20:07:49,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:07:49,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-21 20:07:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 168. [2021-10-21 20:07:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 161 states have (on average 1.236024844720497) internal successors, (199), 167 states have internal predecessors, (199), 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 20:07:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2021-10-21 20:07:49,111 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 37 [2021-10-21 20:07:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:49,111 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2021-10-21 20:07:49,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 20:07:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2021-10-21 20:07:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:07:49,113 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:49,113 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:49,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:49,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 20:07:49,322 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:07:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:49,323 INFO L82 PathProgramCache]: Analyzing trace with hash -318408398, now seen corresponding path program 6 times [2021-10-21 20:07:49,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:49,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286459179] [2021-10-21 20:07:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:49,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:49,339 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:07:49,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287322853] [2021-10-21 20:07:49,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:07:49,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:49,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:49,341 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:49,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 20:07:49,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-21 20:07:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 20:07:49,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:07:50,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:50,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286459179] [2021-10-21 20:07:50,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:07:50,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287322853] [2021-10-21 20:07:50,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287322853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:50,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:50,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:07:50,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228958568] [2021-10-21 20:07:50,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:07:50,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:50,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:07:50,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:07:50,699 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 20:07:51,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:51,139 INFO L93 Difference]: Finished difference Result 200 states and 233 transitions. [2021-10-21 20:07:51,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:07:51,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 37 [2021-10-21 20:07:51,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:51,141 INFO L225 Difference]: With dead ends: 200 [2021-10-21 20:07:51,141 INFO L226 Difference]: Without dead ends: 190 [2021-10-21 20:07:51,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:07:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-21 20:07:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 177. [2021-10-21 20:07:51,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 170 states have (on average 1.2411764705882353) internal successors, (211), 176 states have internal predecessors, (211), 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 20:07:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2021-10-21 20:07:51,175 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 37 [2021-10-21 20:07:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:51,175 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2021-10-21 20:07:51,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 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 20:07:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2021-10-21 20:07:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:07:51,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:51,177 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:51,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:51,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:51,397 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:07:51,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:51,398 INFO L82 PathProgramCache]: Analyzing trace with hash -316561356, now seen corresponding path program 7 times [2021-10-21 20:07:51,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:51,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128091000] [2021-10-21 20:07:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:51,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:51,413 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:07:51,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542115363] [2021-10-21 20:07:51,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:07:51,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:51,414 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:51,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 20:07:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:07:52,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:07:52,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:07:53,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:53,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128091000] [2021-10-21 20:07:53,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:07:53,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542115363] [2021-10-21 20:07:53,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542115363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:53,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:53,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:07:53,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344745366] [2021-10-21 20:07:53,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:07:53,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:07:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:07:53,030 INFO L87 Difference]: Start difference. First operand 177 states and 211 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 20:07:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:53,762 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2021-10-21 20:07:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:07:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 37 [2021-10-21 20:07:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:53,765 INFO L225 Difference]: With dead ends: 214 [2021-10-21 20:07:53,765 INFO L226 Difference]: Without dead ends: 210 [2021-10-21 20:07:53,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:07:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-21 20:07:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 181. [2021-10-21 20:07:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 174 states have (on average 1.2413793103448276) internal successors, (216), 180 states have internal predecessors, (216), 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 20:07:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2021-10-21 20:07:53,792 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 37 [2021-10-21 20:07:53,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:53,793 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2021-10-21 20:07:53,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 20:07:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2021-10-21 20:07:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 20:07:53,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:53,794 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:53,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-21 20:07:54,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 20:07:54,017 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:07:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1329525648, now seen corresponding path program 8 times [2021-10-21 20:07:54,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:54,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293652617] [2021-10-21 20:07:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:54,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:54,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:07:54,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315935610] [2021-10-21 20:07:54,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:07:54,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:54,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:54,040 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:54,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 20:07:54,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:07:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:07:54,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:07:55,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:55,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293652617] [2021-10-21 20:07:55,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:07:55,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315935610] [2021-10-21 20:07:55,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315935610] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:55,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:55,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:07:55,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679797690] [2021-10-21 20:07:55,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:07:55,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:07:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:07:55,577 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 20:07:56,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:56,214 INFO L93 Difference]: Finished difference Result 210 states and 247 transitions. [2021-10-21 20:07:56,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:07:56,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 37 [2021-10-21 20:07:56,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:56,217 INFO L225 Difference]: With dead ends: 210 [2021-10-21 20:07:56,217 INFO L226 Difference]: Without dead ends: 200 [2021-10-21 20:07:56,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:07:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-21 20:07:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 181. [2021-10-21 20:07:56,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 174 states have (on average 1.2413793103448276) internal successors, (216), 180 states have internal predecessors, (216), 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 20:07:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2021-10-21 20:07:56,252 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 37 [2021-10-21 20:07:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:56,253 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2021-10-21 20:07:56,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 20:07:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2021-10-21 20:07:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 20:07:56,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:56,254 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:56,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:56,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 20:07:56,473 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:07:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:56,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1146728065, now seen corresponding path program 3 times [2021-10-21 20:07:56,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:56,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495773642] [2021-10-21 20:07:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:56,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:56,501 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:07:56,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316515507] [2021-10-21 20:07:56,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:07:56,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:56,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:56,503 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:56,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 20:07:57,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:07:57,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:57,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:07:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:07:57,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:57,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495773642] [2021-10-21 20:07:57,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:07:57,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316515507] [2021-10-21 20:07:57,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316515507] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:57,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:57,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 20:07:57,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194455804] [2021-10-21 20:07:57,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:07:57,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:07:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:07:57,621 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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 20:07:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:07:57,742 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2021-10-21 20:07:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:07:57,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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 38 [2021-10-21 20:07:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:07:57,745 INFO L225 Difference]: With dead ends: 211 [2021-10-21 20:07:57,745 INFO L226 Difference]: Without dead ends: 193 [2021-10-21 20:07:57,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:07:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-21 20:07:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2021-10-21 20:07:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 192 states have internal predecessors, (228), 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 20:07:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 228 transitions. [2021-10-21 20:07:57,776 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 228 transitions. Word has length 38 [2021-10-21 20:07:57,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:07:57,776 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 228 transitions. [2021-10-21 20:07:57,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 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 20:07:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 228 transitions. [2021-10-21 20:07:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:07:57,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:07:57,778 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:07:57,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 20:07:57,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:57,993 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:07:57,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:07:57,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1188185069, now seen corresponding path program 3 times [2021-10-21 20:07:57,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:07:57,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131621748] [2021-10-21 20:07:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:07:57,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:07:58,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:07:58,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797684691] [2021-10-21 20:07:58,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:07:58,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:07:58,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:07:58,008 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:07:58,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 20:07:58,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:07:58,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:07:58,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 20:07:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:07:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-21 20:07:59,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:07:59,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131621748] [2021-10-21 20:07:59,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:07:59,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797684691] [2021-10-21 20:07:59,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797684691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:07:59,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:07:59,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 20:07:59,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225701093] [2021-10-21 20:07:59,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:07:59,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:07:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:07:59,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:07:59,843 INFO L87 Difference]: Start difference. First operand 193 states and 228 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 20:08:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:00,669 INFO L93 Difference]: Finished difference Result 253 states and 290 transitions. [2021-10-21 20:08:00,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:08:00,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 39 [2021-10-21 20:08:00,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:00,671 INFO L225 Difference]: With dead ends: 253 [2021-10-21 20:08:00,672 INFO L226 Difference]: Without dead ends: 251 [2021-10-21 20:08:00,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:08:00,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-21 20:08:00,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 193. [2021-10-21 20:08:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.2204301075268817) internal successors, (227), 192 states have internal predecessors, (227), 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 20:08:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2021-10-21 20:08:00,712 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 39 [2021-10-21 20:08:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:00,712 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2021-10-21 20:08:00,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 20:08:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2021-10-21 20:08:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:08:00,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:00,713 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:00,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:00,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:00,925 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:08:00,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:00,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2085713873, now seen corresponding path program 2 times [2021-10-21 20:08:00,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:00,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898976861] [2021-10-21 20:08:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:00,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:00,937 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:08:00,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640825014] [2021-10-21 20:08:00,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:08:00,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:00,939 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:00,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 20:08:01,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:08:01,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 20:08:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:04,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:04,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898976861] [2021-10-21 20:08:04,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:08:04,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640825014] [2021-10-21 20:08:04,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640825014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:04,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:08:04,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 20:08:04,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800519128] [2021-10-21 20:08:04,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:08:04,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:08:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:08:04,995 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 20:08:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:07,923 INFO L93 Difference]: Finished difference Result 239 states and 276 transitions. [2021-10-21 20:08:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:08:07,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 20:08:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:07,926 INFO L225 Difference]: With dead ends: 239 [2021-10-21 20:08:07,926 INFO L226 Difference]: Without dead ends: 237 [2021-10-21 20:08:07,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1945.6ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-21 20:08:07,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-10-21 20:08:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 198. [2021-10-21 20:08:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 191 states have (on average 1.2146596858638743) internal successors, (232), 197 states have internal predecessors, (232), 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 20:08:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 232 transitions. [2021-10-21 20:08:07,972 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 232 transitions. Word has length 39 [2021-10-21 20:08:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:07,972 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 232 transitions. [2021-10-21 20:08:07,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 20:08:07,973 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 232 transitions. [2021-10-21 20:08:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:08:07,974 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:07,974 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:08,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:08,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 20:08:08,189 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:08:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1047636459, now seen corresponding path program 3 times [2021-10-21 20:08:08,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:08,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849429850] [2021-10-21 20:08:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:08,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:08,203 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:08:08,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159932074] [2021-10-21 20:08:08,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:08:08,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:08,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:08,205 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:08,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 20:08:09,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:08:09,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:09,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:08:09,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-21 20:08:09,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:09,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849429850] [2021-10-21 20:08:09,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:08:09,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159932074] [2021-10-21 20:08:09,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159932074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:09,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:08:09,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:08:09,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446329529] [2021-10-21 20:08:09,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:08:09,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:08:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:08:09,456 INFO L87 Difference]: Start difference. First operand 198 states and 232 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 20:08:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:11,341 INFO L93 Difference]: Finished difference Result 198 states and 232 transitions. [2021-10-21 20:08:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:08:11,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) Word has length 39 [2021-10-21 20:08:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:11,343 INFO L225 Difference]: With dead ends: 198 [2021-10-21 20:08:11,344 INFO L226 Difference]: Without dead ends: 184 [2021-10-21 20:08:11,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:08:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-21 20:08:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 143. [2021-10-21 20:08:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 139 states have (on average 1.1510791366906474) internal successors, (160), 142 states have internal predecessors, (160), 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 20:08:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 160 transitions. [2021-10-21 20:08:11,384 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 160 transitions. Word has length 39 [2021-10-21 20:08:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:11,385 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 160 transitions. [2021-10-21 20:08:11,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 20:08:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 160 transitions. [2021-10-21 20:08:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 20:08:11,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:11,386 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:11,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:11,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 20:08:11,601 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:08:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:11,602 INFO L82 PathProgramCache]: Analyzing trace with hash 918563244, now seen corresponding path program 9 times [2021-10-21 20:08:11,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:11,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388182883] [2021-10-21 20:08:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:11,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:11,615 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:08:11,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992143592] [2021-10-21 20:08:11,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:08:11,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:11,627 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:11,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 20:08:12,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 20:08:12,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:12,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 20:08:12,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-10-21 20:08:12,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:12,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388182883] [2021-10-21 20:08:12,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:08:12,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992143592] [2021-10-21 20:08:12,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992143592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:12,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:08:12,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 20:08:12,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632873051] [2021-10-21 20:08:12,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:08:12,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:12,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:08:12,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:08:12,788 INFO L87 Difference]: Start difference. First operand 143 states and 160 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 20:08:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:12,963 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2021-10-21 20:08:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:08:12,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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) Word has length 46 [2021-10-21 20:08:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:12,965 INFO L225 Difference]: With dead ends: 143 [2021-10-21 20:08:12,965 INFO L226 Difference]: Without dead ends: 133 [2021-10-21 20:08:12,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:08:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-21 20:08:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 52. [2021-10-21 20:08:12,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 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 20:08:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-10-21 20:08:12,987 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 46 [2021-10-21 20:08:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:12,988 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-10-21 20:08:12,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 20:08:12,988 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-10-21 20:08:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 20:08:12,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:12,989 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:13,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-21 20:08:13,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 20:08:13,205 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:08:13,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:13,206 INFO L82 PathProgramCache]: Analyzing trace with hash -309462655, now seen corresponding path program 4 times [2021-10-21 20:08:13,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:13,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585038336] [2021-10-21 20:08:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:13,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:13,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:08:13,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428867629] [2021-10-21 20:08:13,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:08:13,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:13,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:13,242 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:13,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 20:08:14,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:08:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:14,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:08:14,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:14,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:14,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585038336] [2021-10-21 20:08:14,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 20:08:14,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428867629] [2021-10-21 20:08:14,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428867629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:14,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:08:14,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 20:08:14,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978653954] [2021-10-21 20:08:14,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:08:14,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:08:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:08:14,467 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 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 20:08:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:14,618 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-10-21 20:08:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:08:14,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 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 47 [2021-10-21 20:08:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:14,619 INFO L225 Difference]: With dead ends: 69 [2021-10-21 20:08:14,620 INFO L226 Difference]: Without dead ends: 61 [2021-10-21 20:08:14,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:08:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-21 20:08:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-21 20:08:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 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 20:08:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2021-10-21 20:08:14,681 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 47 [2021-10-21 20:08:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:14,681 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2021-10-21 20:08:14,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 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 20:08:14,697 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2021-10-21 20:08:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 20:08:14,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:14,698 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:14,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-21 20:08:14,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:14,949 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-21 20:08:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:14,950 INFO L82 PathProgramCache]: Analyzing trace with hash 173421503, now seen corresponding path program 5 times [2021-10-21 20:08:14,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:14,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489872813] [2021-10-21 20:08:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:14,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:14,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 20:08:14,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603344765] [2021-10-21 20:08:14,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:08:14,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:14,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:14,971 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:14,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 20:08:16,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 20:08:16,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-21 20:08:16,391 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:08:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:08:16,510 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:08:16,510 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 20:08:16,511 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:08:16,514 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:08:16,514 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:08:16,515 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:08:16,515 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:08:16,515 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:08:16,515 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 20:08:16,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:16,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:16,734 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:08:16,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:08:16 BoogieIcfgContainer [2021-10-21 20:08:16,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:08:16,825 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:08:16,826 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:08:16,826 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:08:16,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:06:26" (3/4) ... [2021-10-21 20:08:16,830 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 20:08:16,959 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:08:16,959 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:08:16,960 INFO L168 Benchmark]: Toolchain (without parser) took 111125.23 ms. Allocated memory was 115.3 MB in the beginning and 218.1 MB in the end (delta: 102.8 MB). Free memory was 90.6 MB in the beginning and 150.3 MB in the end (delta: -59.7 MB). Peak memory consumption was 71.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:08:16,962 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory was 42.6 MB in the beginning and 42.6 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:08:16,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.41 ms. Allocated memory is still 115.3 MB. Free memory was 90.4 MB in the beginning and 80.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:08:16,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.33 ms. Allocated memory is still 115.3 MB. Free memory was 80.4 MB in the beginning and 78.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:08:16,963 INFO L168 Benchmark]: Boogie Preprocessor took 23.91 ms. Allocated memory is still 115.3 MB. Free memory was 78.6 MB in the beginning and 77.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:08:16,964 INFO L168 Benchmark]: RCFGBuilder took 355.48 ms. Allocated memory is still 115.3 MB. Free memory was 77.4 MB in the beginning and 66.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 20:08:16,964 INFO L168 Benchmark]: TraceAbstraction took 110344.00 ms. Allocated memory was 115.3 MB in the beginning and 218.1 MB in the end (delta: 102.8 MB). Free memory was 65.8 MB in the beginning and 129.5 MB in the end (delta: -63.8 MB). Peak memory consumption was 60.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:08:16,965 INFO L168 Benchmark]: Witness Printer took 133.96 ms. Allocated memory is still 218.1 MB. Free memory was 129.5 MB in the beginning and 150.3 MB in the end (delta: -20.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 20:08:16,972 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory was 42.6 MB in the beginning and 42.6 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 225.41 ms. Allocated memory is still 115.3 MB. Free memory was 90.4 MB in the beginning and 80.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.33 ms. Allocated memory is still 115.3 MB. Free memory was 80.4 MB in the beginning and 78.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.91 ms. Allocated memory is still 115.3 MB. Free memory was 78.6 MB in the beginning and 77.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 355.48 ms. Allocated memory is still 115.3 MB. Free memory was 77.4 MB in the beginning and 66.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 110344.00 ms. Allocated memory was 115.3 MB in the beginning and 218.1 MB in the end (delta: 102.8 MB). Free memory was 65.8 MB in the beginning and 129.5 MB in the end (delta: -63.8 MB). Peak memory consumption was 60.7 MB. Max. memory is 16.1 GB. * Witness Printer took 133.96 ms. Allocated memory is still 218.1 MB. Free memory was 129.5 MB in the beginning and 150.3 MB in the end (delta: -20.7 MB). Peak memory consumption was 4.2 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=1] [L11] COND FALSE !(!(cond)) VAL [counter=1] [L11] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(a != b)) VAL [counter=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(a != b)) VAL [counter=2] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=3] [L11] COND FALSE !(!(cond)) VAL [counter=3] [L11] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(a != b)) VAL [counter=3] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=3] [L34] EXPR counter++ VAL [counter=4] [L34] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(a != b)) VAL [counter=4] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=4] [L34] EXPR counter++ VAL [counter=5] [L34] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(a != b)) VAL [counter=5] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [counter=5] [L34] EXPR counter++ VAL [counter=6] [L34] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=6] [L13] reach_error() VAL [counter=6] - UnprovableResult [Line: 13]: 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: 13]: 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: 13]: 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: 13]: 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: 13]: 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: 13]: 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, 41 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 110166.6ms, OverallIterations: 31, TraceHistogramMax: 6, EmptinessCheckTime: 50.1ms, AutomataDifference: 69838.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1202 SDtfs, 1577 SDslu, 3495 SDs, 0 SdLazy, 3337 SolverSat, 320 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 36323.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 902 GetRequests, 668 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 33856.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=27, InterpolantAutomatonStates: 237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 802.5ms AutomataMinimizationTime, 30 MinimizatonAttempts, 686 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 230.8ms SsaConstructionTime, 1924.0ms SatisfiabilityAnalysisTime, 18391.1ms InterpolantComputationTime, 911 NumberOfCodeBlocks, 819 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 825 ConstructedInterpolants, 7 QuantifiedInterpolants, 9418 SizeOfPredicates, 223 NumberOfNonLiveVariables, 3459 ConjunctsInSsa, 611 ConjunctsInUnsatCore, 30 InterpolantComputations, 7 PerfectInterpolantSequences, 165/647 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 20:08:17,189 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-21 20:08:17,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_475c83ff-c620-46c3-adc6-9656dd37f35e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...