./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa --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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:16:48,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:16:48,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:16:48,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:16:48,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:16:48,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:16:48,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:16:48,343 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:16:48,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:16:48,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:16:48,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:16:48,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:16:48,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:16:48,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:16:48,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:16:48,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:16:48,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:16:48,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:16:48,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:16:48,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:16:48,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:16:48,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:16:48,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:16:48,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:16:48,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:16:48,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:16:48,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:16:48,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:16:48,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:16:48,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:16:48,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:16:48,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:16:48,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:16:48,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:16:48,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:16:48,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:16:48,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:16:48,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:16:48,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:16:48,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:16:48,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:16:48,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:16:48,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:16:48,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:16:48,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:16:48,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:16:48,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:16:48,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:16:48,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:16:48,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:16:48,391 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:16:48,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:16:48,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:16:48,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:16:48,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:16:48,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:16:48,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:16:48,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:16:48,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:16:48,392 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:16:48,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:16:48,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:16:48,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:16:48,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:16:48,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:16:48,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:16:48,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:16:48,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:16:48,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:16:48,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:16:48,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:16:48,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:16:48,394 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:16:48,394 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:16:48,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:16:48,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:16:48,395 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_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 [2021-12-06 23:16:48,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:16:48,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:16:48,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:16:48,582 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:16:48,583 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:16:48,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-12-06 23:16:48,628 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/data/d4e85a021/58bd78543fec4c75b24dfca4ba743711/FLAG2effc02ae [2021-12-06 23:16:48,978 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:16:48,978 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2021-12-06 23:16:48,983 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/data/d4e85a021/58bd78543fec4c75b24dfca4ba743711/FLAG2effc02ae [2021-12-06 23:16:48,991 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/data/d4e85a021/58bd78543fec4c75b24dfca4ba743711 [2021-12-06 23:16:48,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:16:48,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:16:48,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:16:48,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:16:48,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:16:48,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:16:48" (1/1) ... [2021-12-06 23:16:48,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c1f572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:48, skipping insertion in model container [2021-12-06 23:16:48,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:16:48" (1/1) ... [2021-12-06 23:16:49,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:16:49,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:16:49,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2021-12-06 23:16:49,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:16:49,158 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:16:49,171 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2021-12-06 23:16:49,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:16:49,190 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:16:49,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49 WrapperNode [2021-12-06 23:16:49,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:16:49,192 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:16:49,192 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:16:49,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:16:49,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,217 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2021-12-06 23:16:49,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:16:49,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:16:49,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:16:49,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:16:49,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:16:49,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:16:49,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:16:49,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:16:49,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (1/1) ... [2021-12-06 23:16:49,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:16:49,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:49,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:16:49,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:16:49,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:16:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 23:16:49,301 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 23:16:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:16:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:16:49,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:16:49,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 23:16:49,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 23:16:49,352 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:16:49,353 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:16:49,442 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:16:49,447 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:16:49,447 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:16:49,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:16:49 BoogieIcfgContainer [2021-12-06 23:16:49,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:16:49,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:16:49,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:16:49,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:16:49,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:16:48" (1/3) ... [2021-12-06 23:16:49,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a093cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:16:49, skipping insertion in model container [2021-12-06 23:16:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:16:49" (2/3) ... [2021-12-06 23:16:49,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a093cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:16:49, skipping insertion in model container [2021-12-06 23:16:49,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:16:49" (3/3) ... [2021-12-06 23:16:49,455 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2021-12-06 23:16:49,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:16:49,460 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:16:49,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:16:49,499 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 [2021-12-06 23:16:49,500 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:16:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 23:16:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:16:49,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:49,517 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:49,518 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:49,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2021-12-06 23:16:49,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:49,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448449508] [2021-12-06 23:16:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:49,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:49,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:16:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:16:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:49,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:16:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:49,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:16:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:49,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 23:16:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-06 23:16:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:16:49,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:49,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448449508] [2021-12-06 23:16:49,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448449508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:16:49,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:16:49,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:16:49,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523219505] [2021-12-06 23:16:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:16:49,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:16:49,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:16:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:16:49,708 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 23:16:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:49,726 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2021-12-06 23:16:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:16:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-06 23:16:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:49,736 INFO L225 Difference]: With dead ends: 67 [2021-12-06 23:16:49,737 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 23:16:49,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:16:49,744 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:49,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:16:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 23:16:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-06 23:16:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 23:16:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-12-06 23:16:49,780 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2021-12-06 23:16:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:49,780 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-12-06 23:16:49,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 23:16:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-12-06 23:16:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 23:16:49,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:49,782 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:49,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:16:49,783 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2021-12-06 23:16:49,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:49,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508104713] [2021-12-06 23:16:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:49,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:49,809 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:49,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554078901] [2021-12-06 23:16:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:49,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:49,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:49,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:49,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:16:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:49,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 23:16:49,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 23:16:49,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 23:16:50,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508104713] [2021-12-06 23:16:50,080 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554078901] [2021-12-06 23:16:50,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554078901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:16:50,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:16:50,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-12-06 23:16:50,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637303202] [2021-12-06 23:16:50,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:16:50,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:16:50,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:50,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:16:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:16:50,084 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 23:16:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:50,156 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-12-06 23:16:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:16:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2021-12-06 23:16:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:50,158 INFO L225 Difference]: With dead ends: 48 [2021-12-06 23:16:50,158 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 23:16:50,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:16:50,159 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:50,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 134 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:16:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 23:16:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-12-06 23:16:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 23:16:50,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-12-06 23:16:50,169 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2021-12-06 23:16:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:50,169 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-12-06 23:16:50,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 23:16:50,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-12-06 23:16:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:16:50,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:50,170 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:50,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:16:50,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:50,372 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:50,375 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2021-12-06 23:16:50,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:50,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517228504] [2021-12-06 23:16:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:50,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:50,432 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:50,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656974320] [2021-12-06 23:16:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:50,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:50,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:50,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:50,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:16:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 23:16:50,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 23:16:50,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:16:50,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:50,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517228504] [2021-12-06 23:16:50,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656974320] [2021-12-06 23:16:50,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656974320] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:16:50,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:16:50,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-06 23:16:50,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664839799] [2021-12-06 23:16:50,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:16:50,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:16:50,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:16:50,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:16:50,836 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 23:16:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:50,884 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-12-06 23:16:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:16:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-12-06 23:16:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:50,886 INFO L225 Difference]: With dead ends: 39 [2021-12-06 23:16:50,886 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 23:16:50,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:16:50,887 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:50,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:16:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 23:16:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 23:16:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 23:16:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-12-06 23:16:50,894 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2021-12-06 23:16:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:50,894 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-12-06 23:16:50,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-06 23:16:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-12-06 23:16:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 23:16:50,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:50,896 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:50,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:16:51,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:51,098 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:51,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2021-12-06 23:16:51,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:51,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486120918] [2021-12-06 23:16:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:51,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:51,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:51,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977730490] [2021-12-06 23:16:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:51,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:51,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:51,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:51,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:16:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:16:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:16:51,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:16:51,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:51,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486120918] [2021-12-06 23:16:51,265 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:51,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977730490] [2021-12-06 23:16:51,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977730490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:16:51,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:16:51,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:16:51,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61298444] [2021-12-06 23:16:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:16:51,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:16:51,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:16:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:16:51,266 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:16:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:51,293 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-12-06 23:16:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:16:51,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2021-12-06 23:16:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:51,294 INFO L225 Difference]: With dead ends: 50 [2021-12-06 23:16:51,295 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 23:16:51,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:16:51,296 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:51,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 157 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:16:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 23:16:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-06 23:16:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 23:16:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-12-06 23:16:51,304 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2021-12-06 23:16:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:51,304 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-12-06 23:16:51,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-06 23:16:51,305 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-12-06 23:16:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 23:16:51,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:51,305 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:51,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:16:51,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:51,507 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:51,509 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2021-12-06 23:16:51,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:51,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636793037] [2021-12-06 23:16:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:51,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:51,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:51,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520863763] [2021-12-06 23:16:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:51,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:51,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:51,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:51,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:16:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:51,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 23:16:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 23:16:51,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-06 23:16:51,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:51,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636793037] [2021-12-06 23:16:51,897 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:51,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520863763] [2021-12-06 23:16:51,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520863763] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:16:51,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:16:51,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2021-12-06 23:16:51,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364927999] [2021-12-06 23:16:51,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:16:51,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:16:51,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:51,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:16:51,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:16:51,899 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:16:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:51,935 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2021-12-06 23:16:51,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:16:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-12-06 23:16:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:51,936 INFO L225 Difference]: With dead ends: 54 [2021-12-06 23:16:51,936 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 23:16:51,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:16:51,938 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:51,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:16:51,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 23:16:51,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-12-06 23:16:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 23:16:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2021-12-06 23:16:51,946 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2021-12-06 23:16:51,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:51,946 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2021-12-06 23:16:51,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 23:16:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2021-12-06 23:16:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 23:16:51,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:51,947 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:51,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 23:16:52,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:52,149 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:52,151 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2021-12-06 23:16:52,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:52,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730904387] [2021-12-06 23:16:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:52,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:52,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:52,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048448556] [2021-12-06 23:16:52,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:52,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:52,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:52,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:16:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:52,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 23:16:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 23:16:52,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:52,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:52,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730904387] [2021-12-06 23:16:52,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:52,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048448556] [2021-12-06 23:16:52,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048448556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:16:52,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:16:52,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-06 23:16:52,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24039553] [2021-12-06 23:16:52,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 23:16:52,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 23:16:52,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:52,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 23:16:52,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:16:52,573 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:16:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:52,662 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-12-06 23:16:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:16:52,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-06 23:16:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:52,664 INFO L225 Difference]: With dead ends: 58 [2021-12-06 23:16:52,664 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 23:16:52,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:16:52,665 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:52,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 134 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:16:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 23:16:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-06 23:16:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 23:16:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-06 23:16:52,676 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2021-12-06 23:16:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:52,676 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-06 23:16:52,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-06 23:16:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-06 23:16:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 23:16:52,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:52,678 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:52,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:16:52,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 23:16:52,881 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:52,882 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2021-12-06 23:16:52,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:52,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636903299] [2021-12-06 23:16:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:52,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:52,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:52,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015968640] [2021-12-06 23:16:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:52,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:52,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:52,929 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:52,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:16:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:53,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 23:16:53,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 23:16:53,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 23:16:53,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:53,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636903299] [2021-12-06 23:16:53,224 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:53,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015968640] [2021-12-06 23:16:53,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015968640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:16:53,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:16:53,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-06 23:16:53,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228994284] [2021-12-06 23:16:53,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:16:53,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:16:53,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:53,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:16:53,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:16:53,226 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 23:16:53,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:53,336 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2021-12-06 23:16:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:16:53,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2021-12-06 23:16:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:53,338 INFO L225 Difference]: With dead ends: 102 [2021-12-06 23:16:53,338 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 23:16:53,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:16:53,340 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 32 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:53,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 257 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:16:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 23:16:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2021-12-06 23:16:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-06 23:16:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2021-12-06 23:16:53,358 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2021-12-06 23:16:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:53,359 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2021-12-06 23:16:53,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 23:16:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2021-12-06 23:16:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 23:16:53,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:53,361 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:53,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:16:53,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 23:16:53,562 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:53,563 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2021-12-06 23:16:53,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:53,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373219238] [2021-12-06 23:16:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:53,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:53,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:53,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851767322] [2021-12-06 23:16:53,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:53,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:53,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:53,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:53,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:16:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 23:16:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 23:16:53,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 23:16:53,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:53,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373219238] [2021-12-06 23:16:53,885 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:53,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851767322] [2021-12-06 23:16:53,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851767322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:16:53,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:16:53,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-12-06 23:16:53,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887179448] [2021-12-06 23:16:53,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:16:53,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 23:16:53,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 23:16:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:16:53,887 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-06 23:16:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:54,118 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2021-12-06 23:16:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:16:54,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2021-12-06 23:16:54,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:54,121 INFO L225 Difference]: With dead ends: 128 [2021-12-06 23:16:54,121 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 23:16:54,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:16:54,122 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:54,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 312 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:16:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 23:16:54,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-12-06 23:16:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 23:16:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2021-12-06 23:16:54,140 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2021-12-06 23:16:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:54,141 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2021-12-06 23:16:54,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-12-06 23:16:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2021-12-06 23:16:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:16:54,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:54,143 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:54,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:16:54,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:54,345 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2021-12-06 23:16:54,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:54,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077513350] [2021-12-06 23:16:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:54,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:54,379 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:54,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429126894] [2021-12-06 23:16:54,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:16:54,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:54,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:54,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:54,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:16:54,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:16:54,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:16:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 23:16:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 23:16:54,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 23:16:54,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:54,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077513350] [2021-12-06 23:16:54,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:54,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429126894] [2021-12-06 23:16:54,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429126894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:16:54,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:16:54,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-06 23:16:54,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948134616] [2021-12-06 23:16:54,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:16:54,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:16:54,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:54,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:16:54,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:16:54,729 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 23:16:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:55,575 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-12-06 23:16:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:16:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 76 [2021-12-06 23:16:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:55,577 INFO L225 Difference]: With dead ends: 116 [2021-12-06 23:16:55,577 INFO L226 Difference]: Without dead ends: 114 [2021-12-06 23:16:55,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:16:55,578 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:55,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 221 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 23:16:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-06 23:16:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-12-06 23:16:55,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 53 states have (on average 1.169811320754717) internal successors, (62), 55 states have internal predecessors, (62), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-06 23:16:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 129 transitions. [2021-12-06 23:16:55,592 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 129 transitions. Word has length 76 [2021-12-06 23:16:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:55,592 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 129 transitions. [2021-12-06 23:16:55,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 23:16:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 129 transitions. [2021-12-06 23:16:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 23:16:55,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:55,594 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:55,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:16:55,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:55,795 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:55,795 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2021-12-06 23:16:55,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:55,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829357585] [2021-12-06 23:16:55,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:55,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:55,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:55,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654862379] [2021-12-06 23:16:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:16:55,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:55,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:55,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:55,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:16:55,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:16:55,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:16:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:16:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-12-06 23:16:56,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:56,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:56,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829357585] [2021-12-06 23:16:56,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:56,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654862379] [2021-12-06 23:16:56,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654862379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:16:56,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:16:56,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-06 23:16:56,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875816600] [2021-12-06 23:16:56,193 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 23:16:56,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:16:56,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:56,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:16:56,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:16:56,194 INFO L87 Difference]: Start difference. First operand 96 states and 129 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 23:16:56,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:16:56,424 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2021-12-06 23:16:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:16:56,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-12-06 23:16:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:16:56,427 INFO L225 Difference]: With dead ends: 128 [2021-12-06 23:16:56,427 INFO L226 Difference]: Without dead ends: 126 [2021-12-06 23:16:56,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:16:56,428 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:16:56,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 226 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:16:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-06 23:16:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2021-12-06 23:16:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-06 23:16:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2021-12-06 23:16:56,452 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2021-12-06 23:16:56,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:16:56,452 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2021-12-06 23:16:56,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-12-06 23:16:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2021-12-06 23:16:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 23:16:56,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:16:56,454 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:16:56,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:16:56,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:16:56,655 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:16:56,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:16:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2021-12-06 23:16:56,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:16:56,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920255125] [2021-12-06 23:16:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:56,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:16:56,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:16:56,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933761101] [2021-12-06 23:16:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:16:56,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:16:56,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:16:56,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:16:56,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:16:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:16:56,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 23:16:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:16:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:16:57,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-06 23:16:57,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:16:57,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920255125] [2021-12-06 23:16:57,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:16:57,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933761101] [2021-12-06 23:16:57,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933761101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:16:57,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:16:57,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-06 23:16:57,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591397685] [2021-12-06 23:16:57,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:16:57,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:16:57,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:16:57,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:16:57,428 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 23:17:00,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:17:00,101 INFO L93 Difference]: Finished difference Result 205 states and 282 transitions. [2021-12-06 23:17:00,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:17:00,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 87 [2021-12-06 23:17:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:17:00,103 INFO L225 Difference]: With dead ends: 205 [2021-12-06 23:17:00,103 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 23:17:00,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:17:00,105 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:17:00,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 444 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 23:17:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 23:17:00,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2021-12-06 23:17:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 109 states have internal predecessors, (126), 70 states have call successors, (70), 14 states have call predecessors, (70), 14 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-12-06 23:17:00,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 265 transitions. [2021-12-06 23:17:00,131 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 265 transitions. Word has length 87 [2021-12-06 23:17:00,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:17:00,132 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 265 transitions. [2021-12-06 23:17:00,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2021-12-06 23:17:00,132 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 265 transitions. [2021-12-06 23:17:00,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-06 23:17:00,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:17:00,133 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:17:00,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:17:00,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:17:00,335 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:17:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:17:00,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2021-12-06 23:17:00,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:17:00,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101770743] [2021-12-06 23:17:00,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:17:00,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:17:00,360 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:17:00,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309649017] [2021-12-06 23:17:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:17:00,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:17:00,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:17:00,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:17:00,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:17:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:17:00,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 23:17:00,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:17:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 59 proven. 35 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-12-06 23:17:00,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:17:07,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:17:07,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101770743] [2021-12-06 23:17:07,109 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:17:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309649017] [2021-12-06 23:17:07,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309649017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:17:07,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:17:07,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-06 23:17:07,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809543841] [2021-12-06 23:17:07,110 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 23:17:07,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:17:07,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:17:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:17:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=183, Unknown=2, NotChecked=0, Total=240 [2021-12-06 23:17:07,111 INFO L87 Difference]: Start difference. First operand 192 states and 265 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 23:17:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:17:08,169 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-12-06 23:17:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:17:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 103 [2021-12-06 23:17:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:17:08,172 INFO L225 Difference]: With dead ends: 199 [2021-12-06 23:17:08,172 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 23:17:08,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=77, Invalid=263, Unknown=2, NotChecked=0, Total=342 [2021-12-06 23:17:08,172 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:17:08,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 302 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 23:17:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 23:17:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-12-06 23:17:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 states have internal predecessors, (129), 70 states have call successors, (70), 15 states have call predecessors, (70), 15 states have return successors, (69), 68 states have call predecessors, (69), 69 states have call successors, (69) [2021-12-06 23:17:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 268 transitions. [2021-12-06 23:17:08,202 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 268 transitions. Word has length 103 [2021-12-06 23:17:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:17:08,202 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 268 transitions. [2021-12-06 23:17:08,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 23:17:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 268 transitions. [2021-12-06 23:17:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-06 23:17:08,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:17:08,203 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:17:08,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:17:08,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 23:17:08,405 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:17:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:17:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2021-12-06 23:17:08,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:17:08,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493922506] [2021-12-06 23:17:08,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:17:08,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:17:08,435 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:17:08,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986016162] [2021-12-06 23:17:08,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:17:08,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:17:08,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:17:08,438 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:17:08,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:17:08,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:17:08,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:17:08,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 23:17:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:17:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 23:17:08,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:17:08,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:17:08,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493922506] [2021-12-06 23:17:08,744 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:17:08,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986016162] [2021-12-06 23:17:08,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986016162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:17:08,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:17:08,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:17:08,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021470881] [2021-12-06 23:17:08,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:17:08,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:17:08,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:17:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:17:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 23:17:08,745 INFO L87 Difference]: Start difference. First operand 196 states and 268 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 23:17:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:17:08,800 INFO L93 Difference]: Finished difference Result 258 states and 354 transitions. [2021-12-06 23:17:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:17:08,801 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), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2021-12-06 23:17:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:17:08,802 INFO L225 Difference]: With dead ends: 258 [2021-12-06 23:17:08,802 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 23:17:08,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 23:17:08,804 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:17:08,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 167 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:17:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 23:17:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2021-12-06 23:17:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 96 states have (on average 1.125) internal successors, (108), 97 states have internal predecessors, (108), 59 states have call successors, (59), 15 states have call predecessors, (59), 15 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2021-12-06 23:17:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 225 transitions. [2021-12-06 23:17:08,827 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 225 transitions. Word has length 106 [2021-12-06 23:17:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:17:08,828 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 225 transitions. [2021-12-06 23:17:08,828 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), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 23:17:08,828 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 225 transitions. [2021-12-06 23:17:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 23:17:08,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:17:08,829 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:17:08,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:17:09,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 23:17:09,030 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:17:09,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:17:09,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1098112047, now seen corresponding path program 2 times [2021-12-06 23:17:09,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:17:09,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709509596] [2021-12-06 23:17:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:17:09,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:17:09,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:17:09,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431928606] [2021-12-06 23:17:09,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:17:09,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:17:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:17:09,063 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:17:09,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:17:09,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:17:09,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:17:09,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 23:17:09,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:17:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 52 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-12-06 23:17:09,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:17:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 52 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-12-06 23:17:20,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:17:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709509596] [2021-12-06 23:17:20,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:17:20,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431928606] [2021-12-06 23:17:20,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431928606] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:17:20,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:17:20,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-12-06 23:17:20,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706599310] [2021-12-06 23:17:20,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:17:20,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:17:20,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:17:20,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:17:20,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:17:20,044 INFO L87 Difference]: Start difference. First operand 171 states and 225 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-06 23:17:30,607 WARN L227 SmtUtils]: Spent 9.58s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:17:38,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 23:17:49,667 WARN L227 SmtUtils]: Spent 5.66s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:17:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:17:53,641 INFO L93 Difference]: Finished difference Result 262 states and 355 transitions. [2021-12-06 23:17:53,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 23:17:53,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) Word has length 125 [2021-12-06 23:17:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:17:53,644 INFO L225 Difference]: With dead ends: 262 [2021-12-06 23:17:53,644 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 23:17:53,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:17:53,645 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 150 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:17:53,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 444 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 631 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-12-06 23:17:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 23:17:53,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 258. [2021-12-06 23:17:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.132867132867133) internal successors, (162), 145 states have internal predecessors, (162), 95 states have call successors, (95), 19 states have call predecessors, (95), 19 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2021-12-06 23:17:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2021-12-06 23:17:53,709 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 125 [2021-12-06 23:17:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:17:53,709 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2021-12-06 23:17:53,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 14 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (38), 12 states have call predecessors, (38), 13 states have call successors, (38) [2021-12-06 23:17:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2021-12-06 23:17:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-06 23:17:53,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:17:53,711 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:17:53,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:17:53,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:17:53,912 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:17:53,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:17:53,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2021-12-06 23:17:53,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:17:53,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531683544] [2021-12-06 23:17:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:17:53,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:17:53,948 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:17:53,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228265327] [2021-12-06 23:17:53,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:17:53,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:17:53,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:17:53,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:17:53,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:17:54,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:17:54,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:17:54,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-06 23:17:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:17:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 143 proven. 64 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-12-06 23:17:56,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:17:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2021-12-06 23:17:59,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:17:59,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531683544] [2021-12-06 23:17:59,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:17:59,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228265327] [2021-12-06 23:17:59,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228265327] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:17:59,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:17:59,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2021-12-06 23:17:59,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501955080] [2021-12-06 23:17:59,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:17:59,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 23:17:59,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:17:59,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 23:17:59,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-12-06 23:17:59,080 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 23:18:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:18:14,261 INFO L93 Difference]: Finished difference Result 307 states and 414 transitions. [2021-12-06 23:18:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 23:18:14,262 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) Word has length 134 [2021-12-06 23:18:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:18:14,264 INFO L225 Difference]: With dead ends: 307 [2021-12-06 23:18:14,264 INFO L226 Difference]: Without dead ends: 299 [2021-12-06 23:18:14,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 23:18:14,266 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 79 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:18:14,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 440 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 23:18:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-06 23:18:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 236. [2021-12-06 23:18:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 131 states have (on average 1.099236641221374) internal successors, (144), 132 states have internal predecessors, (144), 82 states have call successors, (82), 22 states have call predecessors, (82), 22 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2021-12-06 23:18:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 308 transitions. [2021-12-06 23:18:14,325 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 308 transitions. Word has length 134 [2021-12-06 23:18:14,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:18:14,325 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 308 transitions. [2021-12-06 23:18:14,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 15 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 12 states have call predecessors, (34), 13 states have call successors, (34) [2021-12-06 23:18:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 308 transitions. [2021-12-06 23:18:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 23:18:14,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:18:14,327 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:18:14,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:18:14,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:18:14,528 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:18:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:18:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 3 times [2021-12-06 23:18:14,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:18:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534716375] [2021-12-06 23:18:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:18:14,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:18:14,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:18:14,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728104801] [2021-12-06 23:18:14,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:18:14,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:18:14,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:18:14,537 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:18:14,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:18:20,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:18:20,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:18:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 23:18:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:18:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 177 proven. 41 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2021-12-06 23:18:25,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:18:25,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:18:25,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534716375] [2021-12-06 23:18:25,788 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:18:25,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728104801] [2021-12-06 23:18:25,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728104801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:18:25,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:18:25,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-06 23:18:25,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573577637] [2021-12-06 23:18:25,789 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 23:18:25,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:18:25,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:18:25,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:18:25,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:18:25,790 INFO L87 Difference]: Start difference. First operand 236 states and 308 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-12-06 23:18:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:18:34,142 INFO L93 Difference]: Finished difference Result 335 states and 461 transitions. [2021-12-06 23:18:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:18:34,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 175 [2021-12-06 23:18:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:18:34,145 INFO L225 Difference]: With dead ends: 335 [2021-12-06 23:18:34,145 INFO L226 Difference]: Without dead ends: 333 [2021-12-06 23:18:34,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:18:34,146 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:18:34,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 390 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 23:18:34,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-06 23:18:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-12-06 23:18:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 172 states have (on average 1.127906976744186) internal successors, (194), 174 states have internal predecessors, (194), 130 states have call successors, (130), 25 states have call predecessors, (130), 25 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2021-12-06 23:18:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 454 transitions. [2021-12-06 23:18:34,241 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 454 transitions. Word has length 175 [2021-12-06 23:18:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:18:34,241 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 454 transitions. [2021-12-06 23:18:34,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-12-06 23:18:34,242 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 454 transitions. [2021-12-06 23:18:34,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-06 23:18:34,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:18:34,244 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:18:34,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:18:34,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:18:34,445 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:18:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:18:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1062534286, now seen corresponding path program 4 times [2021-12-06 23:18:34,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:18:34,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274935316] [2021-12-06 23:18:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:18:34,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:18:34,481 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:18:34,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080863695] [2021-12-06 23:18:34,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:18:34,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:18:34,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:18:34,484 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:18:34,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:18:34,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:18:34,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:18:34,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-06 23:18:34,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:18:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 279 proven. 396 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2021-12-06 23:18:38,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:18:58,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:18:58,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274935316] [2021-12-06 23:18:58,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:18:58,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080863695] [2021-12-06 23:18:58,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080863695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:18:58,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:18:58,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-06 23:18:58,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79751481] [2021-12-06 23:18:58,474 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 23:18:58,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 23:18:58,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:18:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 23:18:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-12-06 23:18:58,475 INFO L87 Difference]: Start difference. First operand 328 states and 454 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-06 23:19:04,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:19:04,430 INFO L93 Difference]: Finished difference Result 408 states and 561 transitions. [2021-12-06 23:19:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 23:19:04,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 197 [2021-12-06 23:19:04,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:19:04,432 INFO L225 Difference]: With dead ends: 408 [2021-12-06 23:19:04,432 INFO L226 Difference]: Without dead ends: 406 [2021-12-06 23:19:04,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 200 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 23:19:04,434 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 43 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:19:04,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 972 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 23:19:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-12-06 23:19:04,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 400. [2021-12-06 23:19:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 210 states have (on average 1.1285714285714286) internal successors, (237), 212 states have internal predecessors, (237), 158 states have call successors, (158), 31 states have call predecessors, (158), 31 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2021-12-06 23:19:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 553 transitions. [2021-12-06 23:19:04,547 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 553 transitions. Word has length 197 [2021-12-06 23:19:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:19:04,547 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 553 transitions. [2021-12-06 23:19:04,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 12 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2021-12-06 23:19:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 553 transitions. [2021-12-06 23:19:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 23:19:04,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:19:04,550 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:19:04,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 23:19:04,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:19:04,751 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:19:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:19:04,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2042278159, now seen corresponding path program 5 times [2021-12-06 23:19:04,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:19:04,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375895625] [2021-12-06 23:19:04,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:19:04,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:19:04,763 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:19:04,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325241825] [2021-12-06 23:19:04,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:19:04,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:19:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:19:04,764 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:19:04,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:19:05,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 23:19:05,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:19:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 23:19:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:19:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 230 proven. 275 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2021-12-06 23:19:13,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:19:39,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:19:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375895625] [2021-12-06 23:19:39,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:19:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325241825] [2021-12-06 23:19:39,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325241825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:19:39,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:19:39,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-06 23:19:39,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070381602] [2021-12-06 23:19:39,489 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 23:19:39,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 23:19:39,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:19:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 23:19:39,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1110, Unknown=3, NotChecked=0, Total=1406 [2021-12-06 23:19:39,490 INFO L87 Difference]: Start difference. First operand 400 states and 553 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-06 23:19:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:19:44,089 INFO L93 Difference]: Finished difference Result 473 states and 636 transitions. [2021-12-06 23:19:44,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 23:19:44,090 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) Word has length 219 [2021-12-06 23:19:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:19:44,093 INFO L225 Difference]: With dead ends: 473 [2021-12-06 23:19:44,093 INFO L226 Difference]: Without dead ends: 471 [2021-12-06 23:19:44,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 294 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=502, Invalid=2147, Unknown=3, NotChecked=0, Total=2652 [2021-12-06 23:19:44,094 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 61 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:19:44,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 952 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 23:19:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-12-06 23:19:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 426. [2021-12-06 23:19:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 227 states have (on average 1.1233480176211454) internal successors, (255), 229 states have internal predecessors, (255), 162 states have call successors, (162), 36 states have call predecessors, (162), 36 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2021-12-06 23:19:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 579 transitions. [2021-12-06 23:19:44,214 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 579 transitions. Word has length 219 [2021-12-06 23:19:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:19:44,214 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 579 transitions. [2021-12-06 23:19:44,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 22 states have internal predecessors, (45), 12 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (37), 12 states have call predecessors, (37), 12 states have call successors, (37) [2021-12-06 23:19:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 579 transitions. [2021-12-06 23:19:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-06 23:19:44,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:19:44,217 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:19:44,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 23:19:44,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 23:19:44,418 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:19:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:19:44,418 INFO L85 PathProgramCache]: Analyzing trace with hash 474997075, now seen corresponding path program 6 times [2021-12-06 23:19:44,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:19:44,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26115286] [2021-12-06 23:19:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:19:44,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:19:44,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:19:44,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174887954] [2021-12-06 23:19:44,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:19:44,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:19:44,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:19:44,432 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:19:44,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:19:45,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 23:19:45,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:19:45,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 23:19:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:19:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 312 proven. 31 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2021-12-06 23:19:53,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:19:56,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:19:56,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26115286] [2021-12-06 23:19:56,269 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:19:56,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174887954] [2021-12-06 23:19:56,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174887954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:19:56,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:19:56,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-06 23:19:56,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205425038] [2021-12-06 23:19:56,269 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 23:19:56,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:19:56,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:19:56,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:19:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=277, Unknown=2, NotChecked=0, Total=342 [2021-12-06 23:19:56,270 INFO L87 Difference]: Start difference. First operand 426 states and 579 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 23:20:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:20:07,012 INFO L93 Difference]: Finished difference Result 431 states and 583 transitions. [2021-12-06 23:20:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 23:20:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) Word has length 219 [2021-12-06 23:20:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:20:07,013 INFO L225 Difference]: With dead ends: 431 [2021-12-06 23:20:07,013 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 23:20:07,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=116, Invalid=530, Unknown=4, NotChecked=0, Total=650 [2021-12-06 23:20:07,015 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:20:07,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 268 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 470 Invalid, 0 Unknown, 16 Unchecked, 3.2s Time] [2021-12-06 23:20:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 23:20:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 23:20:07,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:20:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 23:20:07,016 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 219 [2021-12-06 23:20:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:20:07,016 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 23:20:07,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 6 states have call successors, (17) [2021-12-06 23:20:07,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 23:20:07,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 23:20:07,018 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 23:20:07,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 23:20:07,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:20:07,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 23:21:15,548 WARN L227 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 331 DAG size of output: 50 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 23:21:43,813 WARN L227 SmtUtils]: Spent 28.26s on a formula simplification. DAG size of input: 250 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 23:22:40,162 WARN L227 SmtUtils]: Spent 56.34s on a formula simplification. DAG size of input: 333 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 23:23:21,867 WARN L227 SmtUtils]: Spent 41.70s on a formula simplification. DAG size of input: 333 DAG size of output: 46 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 23:24:08,734 WARN L227 SmtUtils]: Spent 46.86s on a formula simplification. DAG size of input: 339 DAG size of output: 47 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 23:24:54,759 WARN L227 SmtUtils]: Spent 45.88s on a formula simplification. DAG size of input: 339 DAG size of output: 47 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-12-06 23:24:55,732 INFO L854 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 23:24:55,733 INFO L854 garLoopResultBuilder]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 23:24:55,733 INFO L861 garLoopResultBuilder]: At program point L73(lines 18 74) the Hoare annotation is: true [2021-12-06 23:24:55,733 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-06 23:24:55,733 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-06 23:24:55,733 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-06 23:24:55,733 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2021-12-06 23:24:55,733 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2021-12-06 23:24:55,733 INFO L854 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 23:24:55,733 INFO L854 garLoopResultBuilder]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse0 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse1 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse5 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse7 (= |ULTIMATE.start_main_~a~0#1| .cse0))) (or (and (or (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (not (= |ULTIMATE.start_main_~c~0#1| 0)) (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|)) .cse0)) (<= 0 |ULTIMATE.start_main_~b~0#1|) .cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|) .cse2 .cse3 .cse4 .cse5 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse6 .cse7) (and .cse1 .cse2 .cse3 (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse4 .cse5 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse6 .cse7 (= |ULTIMATE.start_main_~s~0#1| 1))))) [2021-12-06 23:24:55,733 INFO L854 garLoopResultBuilder]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (= 0 .cse0) (= |ULTIMATE.start_main_~b~0#1| .cse0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) [2021-12-06 23:24:55,734 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-06 23:24:55,734 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (<= |ULTIMATE.start_main_~x~0#1| 20)) [2021-12-06 23:24:55,734 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse9 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= |ULTIMATE.start_main_~a~0#1| .cse9))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|) .cse8 (= |ULTIMATE.start_main_~s~0#1| 1)) (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 (= .cse9 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8)))) [2021-12-06 23:24:55,734 INFO L858 garLoopResultBuilder]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-12-06 23:24:55,734 INFO L854 garLoopResultBuilder]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) [2021-12-06 23:24:55,734 INFO L854 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-12-06 23:24:55,734 INFO L854 garLoopResultBuilder]: At program point L38-1(line 38) the Hoare annotation is: (and (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 20) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 20) (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (= |ULTIMATE.start_main_~s~0#1| 1)) [2021-12-06 23:24:55,734 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-12-06 23:24:55,734 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-12-06 23:24:55,734 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-12-06 23:24:55,734 INFO L858 garLoopResultBuilder]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-12-06 23:24:55,734 INFO L854 garLoopResultBuilder]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~yy~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse2 (= (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~xy~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)))) (.cse4 (<= 0 |ULTIMATE.start_main_~c~0#1|)) (.cse5 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~y~0#1| 20)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 20)) (.cse8 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~c~0#1|) |ULTIMATE.start_main_~a~0#1|)) (.cse9 (= |ULTIMATE.start_main_~a~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))))) (or (and (< 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) .cse7 .cse8 .cse9) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~r~0#1| 0) (= |ULTIMATE.start_main_~q~0#1| 0) .cse5 .cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|) .cse7 .cse8 .cse9 (= |ULTIMATE.start_main_~s~0#1| 1)))) [2021-12-06 23:24:55,734 INFO L858 garLoopResultBuilder]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point L72(line 72) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-12-06 23:24:55,735 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-12-06 23:24:55,737 INFO L732 BasicCegarLoop]: Path program histogram: [6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:24:55,738 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 23:24:55,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 11:24:55 BoogieIcfgContainer [2021-12-06 23:24:55,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 23:24:55,756 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 23:24:55,756 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 23:24:55,756 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 23:24:55,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:16:49" (3/4) ... [2021-12-06 23:24:55,759 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 23:24:55,765 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-12-06 23:24:55,765 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-12-06 23:24:55,769 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-06 23:24:55,770 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-06 23:24:55,770 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 23:24:55,770 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 23:24:55,803 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 23:24:55,803 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 23:24:55,803 INFO L158 Benchmark]: Toolchain (without parser) took 486809.27ms. Allocated memory was 92.3MB in the beginning and 213.9MB in the end (delta: 121.6MB). Free memory was 57.9MB in the beginning and 184.7MB in the end (delta: -126.8MB). Peak memory consumption was 121.0MB. Max. memory is 16.1GB. [2021-12-06 23:24:55,803 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 92.3MB. Free memory was 65.0MB in the beginning and 65.0MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:24:55,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.09ms. Allocated memory is still 92.3MB. Free memory was 57.5MB in the beginning and 66.8MB in the end (delta: -9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 23:24:55,804 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.66ms. Allocated memory is still 92.3MB. Free memory was 66.8MB in the beginning and 65.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 23:24:55,804 INFO L158 Benchmark]: Boogie Preprocessor took 15.56ms. Allocated memory is still 92.3MB. Free memory was 65.1MB in the beginning and 64.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 23:24:55,804 INFO L158 Benchmark]: RCFGBuilder took 214.92ms. Allocated memory is still 92.3MB. Free memory was 64.0MB in the beginning and 53.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 23:24:55,805 INFO L158 Benchmark]: TraceAbstraction took 486305.76ms. Allocated memory was 92.3MB in the beginning and 213.9MB in the end (delta: 121.6MB). Free memory was 53.2MB in the beginning and 62.2MB in the end (delta: -9.0MB). Peak memory consumption was 119.3MB. Max. memory is 16.1GB. [2021-12-06 23:24:55,805 INFO L158 Benchmark]: Witness Printer took 46.76ms. Allocated memory is still 213.9MB. Free memory was 62.2MB in the beginning and 184.7MB in the end (delta: -122.4MB). Peak memory consumption was 2.4MB. Max. memory is 16.1GB. [2021-12-06 23:24:55,806 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 92.3MB. Free memory was 65.0MB in the beginning and 65.0MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.09ms. Allocated memory is still 92.3MB. Free memory was 57.5MB in the beginning and 66.8MB in the end (delta: -9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.66ms. Allocated memory is still 92.3MB. Free memory was 66.8MB in the beginning and 65.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.56ms. Allocated memory is still 92.3MB. Free memory was 65.1MB in the beginning and 64.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 214.92ms. Allocated memory is still 92.3MB. Free memory was 64.0MB in the beginning and 53.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 486305.76ms. Allocated memory was 92.3MB in the beginning and 213.9MB in the end (delta: 121.6MB). Free memory was 53.2MB in the beginning and 62.2MB in the end (delta: -9.0MB). Peak memory consumption was 119.3MB. Max. memory is 16.1GB. * Witness Printer took 46.76ms. Allocated memory is still 213.9MB. Free memory was 62.2MB in the beginning and 184.7MB in the end (delta: -122.4MB). Peak memory consumption was 2.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 486.2s, OverallIterations: 19, TraceHistogramMax: 32, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 84.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 288.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 696 SdHoareTripleChecker+Valid, 29.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 591 mSDsluCounter, 6143 SdHoareTripleChecker+Invalid, 28.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 16 IncrementalHoareTripleChecker+Unchecked, 5310 mSDsCounter, 1013 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7856 IncrementalHoareTripleChecker+Invalid, 8886 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1013 mSolverCounterUnsat, 833 mSDtfsCounter, 7856 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2927 GetRequests, 2522 SyntacticMatches, 27 SemanticMatches, 378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 105.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=426occurred in iteration=18, InterpolantAutomatonStates: 264, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 19 MinimizatonAttempts, 211 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 227 PreInvPairs, 448 NumberOfFragments, 935 HoareAnnotationTreeSize, 227 FomulaSimplifications, 30581 FormulaSimplificationTreeSizeReduction, 5.1s HoareSimplificationTime, 17 FomulaSimplificationsInter, 117382 FormulaSimplificationTreeSizeReductionInter, 283.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 99.9s InterpolantComputationTime, 1931 NumberOfCodeBlocks, 1636 NumberOfCodeBlocksAsserted, 40 NumberOfCheckSat, 2593 ConstructedInterpolants, 2 QuantifiedInterpolants, 18626 SizeOfPredicates, 139 NumberOfNonLiveVariables, 3953 ConjunctsInSsa, 687 ConjunctsInUnsatCore, 28 InterpolantComputations, 5 PerfectInterpolantSequences, 10896/11979 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: (((((((((((0 < b && yy == y * y) && 1 <= y) && y * x == xy) && b == x * q + y * s) && 0 <= c) && 1 <= x) && y <= 20) && b < a) && x <= 20) && k * b + c == a) && a == x * p + y * r) || (((((((((((((yy == y * y && 1 <= y) && y * x == xy) && b == x * q + y * s) && 0 <= c) && r == 0) && q == 0) && 1 <= x) && y <= 20) && a == x) && x <= 20) && k * b + c == a) && a == x * p + y * r) && s == 1) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: ((((((((((((b <= c || !(c == 0)) || k * x * q + y * k * s == x * p + y * r) && 0 <= b) && yy == y * y) && 1 <= y) && y * x == xy) && b == x * q + y * s) && 1 <= x) && y <= 20) && b < a) && x <= 20) && a == x * p + y * r) || (((((((((((yy == y * y && y * x == xy) && b == x * q + y * s) && 1 <= b) && r == 0) && q == 0) && 1 <= x) && y <= 20) && a == x) && x <= 20) && a == x * p + y * r) && s == 1) RESULT: Ultimate proved your program to be correct! [2021-12-06 23:24:55,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc6e28e8-89e5-405d-88ab-ce979905dbd8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE