./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fbe6596ea58bb65874b731661e9f9f596a91893af06dcebaa497157579c7f46 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:01:12,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:01:12,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:01:12,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:01:12,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:01:12,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:01:12,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:01:12,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:01:12,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:01:12,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:01:12,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:01:12,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:01:12,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:01:12,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:01:12,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:01:12,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:01:12,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:01:12,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:01:12,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:01:12,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:01:12,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:01:12,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:01:12,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:01:12,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:01:12,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:01:12,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:01:12,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:01:12,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:01:12,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:01:12,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:01:12,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:01:12,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:01:12,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:01:12,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:01:12,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:01:12,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:01:12,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:01:12,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:01:12,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:01:12,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:01:12,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:01:12,470 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:01:12,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:01:12,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:01:12,495 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:01:12,495 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:01:12,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:01:12,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:01:12,497 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:01:12,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:01:12,497 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:01:12,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:01:12,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:01:12,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:01:12,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:01:12,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:01:12,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:01:12,499 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:01:12,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:01:12,499 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:01:12,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:01:12,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:01:12,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:01:12,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:01:12,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:01:12,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:01:12,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:01:12,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:01:12,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:01:12,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:01:12,501 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:01:12,501 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:01:12,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:01:12,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:01:12,502 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_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fbe6596ea58bb65874b731661e9f9f596a91893af06dcebaa497157579c7f46 [2021-10-21 19:01:12,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:01:12,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:01:12,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:01:12,812 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:01:12,813 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:01:12,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2021-10-21 19:01:12,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/data/04a1f2d1c/69ab9876280f467bb154407180e8aa7c/FLAG7fa5a3f09 [2021-10-21 19:01:13,360 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:01:13,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c [2021-10-21 19:01:13,367 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/data/04a1f2d1c/69ab9876280f467bb154407180e8aa7c/FLAG7fa5a3f09 [2021-10-21 19:01:13,757 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/data/04a1f2d1c/69ab9876280f467bb154407180e8aa7c [2021-10-21 19:01:13,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:01:13,761 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:01:13,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:01:13,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:01:13,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:01:13,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:01:13" (1/1) ... [2021-10-21 19:01:13,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3db9a837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:13, skipping insertion in model container [2021-10-21 19:01:13,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:01:13" (1/1) ... [2021-10-21 19:01:13,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:01:13,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:01:13,971 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2021-10-21 19:01:13,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:01:13,995 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:01:14,008 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound20.c[458,471] [2021-10-21 19:01:14,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:01:14,030 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:01:14,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14 WrapperNode [2021-10-21 19:01:14,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:01:14,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:01:14,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:01:14,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:01:14,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:01:14,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:01:14,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:01:14,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:01:14,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:01:14,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:01:14,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:01:14,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:01:14,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (1/1) ... [2021-10-21 19:01:14,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:01:14,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:14,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:01:14,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:01:14,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:01:14,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:01:14,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:01:14,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:01:14,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:01:14,407 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-21 19:01:14,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:01:14 BoogieIcfgContainer [2021-10-21 19:01:14,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:01:14,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:01:14,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:01:14,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:01:14,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:01:13" (1/3) ... [2021-10-21 19:01:14,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1d6498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:01:14, skipping insertion in model container [2021-10-21 19:01:14,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:01:14" (2/3) ... [2021-10-21 19:01:14,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1d6498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:01:14, skipping insertion in model container [2021-10-21 19:01:14,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:01:14" (3/3) ... [2021-10-21 19:01:14,438 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2021-10-21 19:01:14,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:01:14,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-21 19:01:14,513 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:01:14,536 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:01:14,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-21 19:01:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 19:01:14,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:14,579 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:14,579 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:14,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-10-21 19:01:14,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:14,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725859029] [2021-10-21 19:01:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:14,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:01:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:14,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:14,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725859029] [2021-10-21 19:01:14,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725859029] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:01:14,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:01:14,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:01:14,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553385098] [2021-10-21 19:01:14,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:01:14,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:01:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:01:14,755 INFO L87 Difference]: Start difference. First operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:14,771 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-10-21 19:01:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:01:14,773 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-21 19:01:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:14,781 INFO L225 Difference]: With dead ends: 39 [2021-10-21 19:01:14,781 INFO L226 Difference]: Without dead ends: 17 [2021-10-21 19:01:14,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:01:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-21 19:01:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-21 19:01:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:14,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-21 19:01:14,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2021-10-21 19:01:14,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:14,811 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-21 19:01:14,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-21 19:01:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 19:01:14,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:14,812 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:14,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:01:14,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:14,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-10-21 19:01:14,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:14,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824520524] [2021-10-21 19:01:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:14,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:14,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:14,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510935165] [2021-10-21 19:01:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:14,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:14,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:14,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:14,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:01:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:01:14,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:01:14,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:15,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:15,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824520524] [2021-10-21 19:01:15,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:15,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510935165] [2021-10-21 19:01:15,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510935165] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:01:15,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:01:15,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:01:15,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965465962] [2021-10-21 19:01:15,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:01:15,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:15,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:01:15,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:01:15,017 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:15,070 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-10-21 19:01:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:01:15,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-21 19:01:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:15,071 INFO L225 Difference]: With dead ends: 31 [2021-10-21 19:01:15,071 INFO L226 Difference]: Without dead ends: 21 [2021-10-21 19:01:15,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:01:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-21 19:01:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-21 19:01:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-21 19:01:15,077 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2021-10-21 19:01:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:15,077 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-21 19:01:15,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:15,078 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-21 19:01:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:01:15,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:15,079 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:15,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:15,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:15,298 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:15,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:15,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-10-21 19:01:15,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:15,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191030454] [2021-10-21 19:01:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:15,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:15,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:15,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525822496] [2021-10-21 19:01:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:15,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:15,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:15,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:15,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:01:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:01:15,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:01:15,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:15,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:15,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191030454] [2021-10-21 19:01:15,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:15,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525822496] [2021-10-21 19:01:15,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525822496] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:15,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:15,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:01:15,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386476743] [2021-10-21 19:01:15,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:01:15,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:01:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:01:15,595 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:15,660 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-10-21 19:01:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:01:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-21 19:01:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:15,661 INFO L225 Difference]: With dead ends: 34 [2021-10-21 19:01:15,661 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:01:15,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:01:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:01:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-10-21 19:01:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-21 19:01:15,667 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2021-10-21 19:01:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:15,667 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-21 19:01:15,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-21 19:01:15,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:01:15,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:15,669 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:15,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:15,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:15,886 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:15,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-10-21 19:01:15,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:15,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834812814] [2021-10-21 19:01:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:15,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:15,905 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:15,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424569289] [2021-10-21 19:01:15,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:01:15,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:15,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:15,907 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:15,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:01:15,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:01:15,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:16,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:01:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:16,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:16,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834812814] [2021-10-21 19:01:16,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:16,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424569289] [2021-10-21 19:01:16,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424569289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:16,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:16,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:01:16,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405721183] [2021-10-21 19:01:16,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:01:16,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:01:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:01:16,189 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:16,311 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-10-21 19:01:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:01:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-21 19:01:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:16,313 INFO L225 Difference]: With dead ends: 41 [2021-10-21 19:01:16,313 INFO L226 Difference]: Without dead ends: 35 [2021-10-21 19:01:16,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:01:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-21 19:01:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-21 19:01:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-21 19:01:16,325 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2021-10-21 19:01:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:16,326 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-21 19:01:16,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-21 19:01:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 19:01:16,327 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:16,327 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:16,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:16,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:16,535 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:16,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2021-10-21 19:01:16,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:16,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621650847] [2021-10-21 19:01:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:16,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:16,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:16,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084285579] [2021-10-21 19:01:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:16,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:16,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:16,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:16,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:01:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:01:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:01:16,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:16,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:16,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621650847] [2021-10-21 19:01:16,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:16,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084285579] [2021-10-21 19:01:16,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084285579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:16,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:16,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-21 19:01:16,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573228449] [2021-10-21 19:01:16,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:01:16,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:01:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:01:16,838 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:16,899 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-21 19:01:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:01:16,900 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-21 19:01:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:16,900 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:01:16,901 INFO L226 Difference]: Without dead ends: 28 [2021-10-21 19:01:16,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:01:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-21 19:01:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-21 19:01:16,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-21 19:01:16,906 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 13 [2021-10-21 19:01:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:16,906 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-21 19:01:16,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:16,907 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-21 19:01:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:01:16,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:16,908 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:16,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:17,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:17,126 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-10-21 19:01:17,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:17,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512827987] [2021-10-21 19:01:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:17,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:17,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:17,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124299675] [2021-10-21 19:01:17,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:01:17,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:17,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:17,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:17,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:01:17,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:01:17,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:17,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:01:17,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-21 19:01:17,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:17,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512827987] [2021-10-21 19:01:17,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:17,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124299675] [2021-10-21 19:01:17,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124299675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:17,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:17,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-21 19:01:17,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291843892] [2021-10-21 19:01:17,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:01:17,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:17,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:01:17,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:01:17,438 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:17,846 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-21 19:01:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:01:17,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-21 19:01:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:17,848 INFO L225 Difference]: With dead ends: 28 [2021-10-21 19:01:17,848 INFO L226 Difference]: Without dead ends: 22 [2021-10-21 19:01:17,848 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:01:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-21 19:01:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-10-21 19:01:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-21 19:01:17,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 16 [2021-10-21 19:01:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:17,853 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-21 19:01:17,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:17,854 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-21 19:01:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:01:17,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:17,854 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:17,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:18,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:18,067 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1496575115, now seen corresponding path program 2 times [2021-10-21 19:01:18,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:18,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569736618] [2021-10-21 19:01:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:18,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:18,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:18,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966707669] [2021-10-21 19:01:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:01:18,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:18,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:18,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:01:18,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:01:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:18,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:01:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:18,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:18,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569736618] [2021-10-21 19:01:18,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:18,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966707669] [2021-10-21 19:01:18,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966707669] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:18,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:18,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-21 19:01:18,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994545332] [2021-10-21 19:01:18,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:01:18,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:01:18,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:01:18,365 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:18,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:18,442 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-10-21 19:01:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:01:18,443 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-21 19:01:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:18,443 INFO L225 Difference]: With dead ends: 24 [2021-10-21 19:01:18,444 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 19:01:18,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:01:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 19:01:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-21 19:01:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-21 19:01:18,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2021-10-21 19:01:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:18,454 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-21 19:01:18,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-21 19:01:18,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:01:18,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:18,455 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:18,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:18,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:18,678 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:18,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1490885148, now seen corresponding path program 3 times [2021-10-21 19:01:18,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:18,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011256792] [2021-10-21 19:01:18,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:18,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:18,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:18,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090639247] [2021-10-21 19:01:18,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:01:18,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:18,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:18,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:01:18,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:01:18,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:18,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-21 19:01:18,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:19,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:19,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011256792] [2021-10-21 19:01:19,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:19,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090639247] [2021-10-21 19:01:19,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090639247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:19,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:19,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-21 19:01:19,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129862321] [2021-10-21 19:01:19,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:01:19,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:01:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:01:19,044 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:19,140 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-10-21 19:01:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:01:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-21 19:01:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:19,142 INFO L225 Difference]: With dead ends: 27 [2021-10-21 19:01:19,142 INFO L226 Difference]: Without dead ends: 23 [2021-10-21 19:01:19,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:01:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-21 19:01:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-21 19:01:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-21 19:01:19,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2021-10-21 19:01:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-21 19:01:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:19,149 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-21 19:01:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-21 19:01:19,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:19,150 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:19,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:19,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 19:01:19,366 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:19,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash 515197205, now seen corresponding path program 4 times [2021-10-21 19:01:19,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:19,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859903509] [2021-10-21 19:01:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:19,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:19,377 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:19,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927973983] [2021-10-21 19:01:19,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:01:19,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:19,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:19,386 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:19,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:01:19,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:01:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:19,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:01:19,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:19,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859903509] [2021-10-21 19:01:19,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927973983] [2021-10-21 19:01:19,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927973983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:19,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:19,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-21 19:01:19,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370381772] [2021-10-21 19:01:19,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:01:19,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:01:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:01:19,869 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:20,144 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-10-21 19:01:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:01:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-21 19:01:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:20,146 INFO L225 Difference]: With dead ends: 30 [2021-10-21 19:01:20,146 INFO L226 Difference]: Without dead ends: 26 [2021-10-21 19:01:20,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:01:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-21 19:01:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-21 19:01:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-21 19:01:20,152 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2021-10-21 19:01:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:20,153 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-21 19:01:20,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-21 19:01:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:01:20,154 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:20,154 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:20,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-21 19:01:20,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:20,359 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash -755348412, now seen corresponding path program 5 times [2021-10-21 19:01:20,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:20,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837729872] [2021-10-21 19:01:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:20,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:20,370 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:20,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596699348] [2021-10-21 19:01:20,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:01:20,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:20,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:20,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:01:20,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-21 19:01:20,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:01:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:20,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:20,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837729872] [2021-10-21 19:01:20,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:20,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596699348] [2021-10-21 19:01:20,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596699348] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:20,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:20,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-21 19:01:20,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914482806] [2021-10-21 19:01:20,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:01:20,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:01:20,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:01:20,805 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:21,012 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-10-21 19:01:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:01:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-21 19:01:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:21,013 INFO L225 Difference]: With dead ends: 33 [2021-10-21 19:01:21,013 INFO L226 Difference]: Without dead ends: 29 [2021-10-21 19:01:21,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:01:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-21 19:01:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-21 19:01:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-10-21 19:01:21,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2021-10-21 19:01:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:21,022 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-10-21 19:01:21,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-10-21 19:01:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:01:21,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:21,024 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:21,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:21,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-21 19:01:21,238 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:21,238 INFO L82 PathProgramCache]: Analyzing trace with hash -33044811, now seen corresponding path program 6 times [2021-10-21 19:01:21,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:21,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158767646] [2021-10-21 19:01:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:21,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:21,248 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:21,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465544228] [2021-10-21 19:01:21,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:01:21,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:21,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:21,254 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:21,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:01:21,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 19:01:21,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 19:01:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:22,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:22,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158767646] [2021-10-21 19:01:22,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:22,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465544228] [2021-10-21 19:01:22,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465544228] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:22,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:22,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-21 19:01:22,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280218763] [2021-10-21 19:01:22,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:01:22,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:22,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:01:22,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:01:22,148 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:22,406 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-10-21 19:01:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:01:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-21 19:01:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:22,407 INFO L225 Difference]: With dead ends: 36 [2021-10-21 19:01:22,407 INFO L226 Difference]: Without dead ends: 32 [2021-10-21 19:01:22,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:01:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-21 19:01:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-21 19:01:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-21 19:01:22,415 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2021-10-21 19:01:22,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:22,416 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-21 19:01:22,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-21 19:01:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:01:22,417 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:22,417 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:22,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:22,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:01:22,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:22,623 INFO L82 PathProgramCache]: Analyzing trace with hash 327379620, now seen corresponding path program 7 times [2021-10-21 19:01:22,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:22,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623943466] [2021-10-21 19:01:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:22,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:22,634 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:22,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61430117] [2021-10-21 19:01:22,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:01:22,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:22,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:22,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:22,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:01:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:01:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-21 19:01:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:23,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:23,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623943466] [2021-10-21 19:01:23,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:23,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61430117] [2021-10-21 19:01:23,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61430117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:23,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:23,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-21 19:01:23,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212342550] [2021-10-21 19:01:23,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:01:23,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:01:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:01:23,787 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:24,272 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-10-21 19:01:24,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:01:24,272 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-21 19:01:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:24,273 INFO L225 Difference]: With dead ends: 40 [2021-10-21 19:01:24,273 INFO L226 Difference]: Without dead ends: 36 [2021-10-21 19:01:24,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:01:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-21 19:01:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-10-21 19:01:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-10-21 19:01:24,282 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-10-21 19:01:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:24,284 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-10-21 19:01:24,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-10-21 19:01:24,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:01:24,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:24,292 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:24,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:24,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:24,497 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:24,498 INFO L82 PathProgramCache]: Analyzing trace with hash 313363541, now seen corresponding path program 8 times [2021-10-21 19:01:24,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:24,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413840384] [2021-10-21 19:01:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:24,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:24,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:24,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940661964] [2021-10-21 19:01:24,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:01:24,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:24,530 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:24,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:01:25,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:01:25,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:25,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:01:25,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:25,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:25,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413840384] [2021-10-21 19:01:25,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:25,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940661964] [2021-10-21 19:01:25,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940661964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:25,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:25,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-21 19:01:25,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367731414] [2021-10-21 19:01:25,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:01:25,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:01:25,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:01:25,963 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:26,310 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-10-21 19:01:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:01:26,311 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-21 19:01:26,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:26,311 INFO L225 Difference]: With dead ends: 42 [2021-10-21 19:01:26,312 INFO L226 Difference]: Without dead ends: 38 [2021-10-21 19:01:26,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:01:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-21 19:01:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-21 19:01:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-10-21 19:01:26,321 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2021-10-21 19:01:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:26,321 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-10-21 19:01:26,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-10-21 19:01:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:01:26,322 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:26,322 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:26,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:26,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:01:26,528 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:26,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:26,528 INFO L82 PathProgramCache]: Analyzing trace with hash -627818236, now seen corresponding path program 9 times [2021-10-21 19:01:26,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:26,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306234815] [2021-10-21 19:01:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:26,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:26,540 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:26,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752010268] [2021-10-21 19:01:26,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:01:26,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:26,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:26,545 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:26,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:01:26,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-21 19:01:26,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:26,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-21 19:01:26,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:27,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:27,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306234815] [2021-10-21 19:01:27,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:27,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752010268] [2021-10-21 19:01:27,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752010268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:27,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:27,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-21 19:01:27,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402829405] [2021-10-21 19:01:27,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:01:27,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:27,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:01:27,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:01:27,427 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:27,830 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-10-21 19:01:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:01:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-21 19:01:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:27,832 INFO L225 Difference]: With dead ends: 45 [2021-10-21 19:01:27,832 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 19:01:27,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:01:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 19:01:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-10-21 19:01:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-10-21 19:01:27,841 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2021-10-21 19:01:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:27,842 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-10-21 19:01:27,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-10-21 19:01:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:01:27,843 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:27,843 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:27,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:28,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:28,062 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:28,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:28,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1827628555, now seen corresponding path program 10 times [2021-10-21 19:01:28,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:28,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987850943] [2021-10-21 19:01:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:28,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:28,074 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:28,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274988963] [2021-10-21 19:01:28,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:01:28,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:28,086 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:28,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:01:28,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:01:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-21 19:01:28,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:29,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:29,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987850943] [2021-10-21 19:01:29,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:29,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274988963] [2021-10-21 19:01:29,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274988963] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:29,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:29,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-21 19:01:29,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577289366] [2021-10-21 19:01:29,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:01:29,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:29,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:01:29,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:01:29,037 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:29,664 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-10-21 19:01:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:01:29,664 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-21 19:01:29,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:29,664 INFO L225 Difference]: With dead ends: 48 [2021-10-21 19:01:29,665 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 19:01:29,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:01:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 19:01:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-21 19:01:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-10-21 19:01:29,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2021-10-21 19:01:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:29,675 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-10-21 19:01:29,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-10-21 19:01:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:01:29,675 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:29,676 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:29,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:29,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:01:29,876 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:29,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1635962724, now seen corresponding path program 11 times [2021-10-21 19:01:29,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:29,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528400503] [2021-10-21 19:01:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:29,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:29,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:29,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414743913] [2021-10-21 19:01:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:01:29,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:29,898 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:29,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:01:30,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-21 19:01:30,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:30,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-21 19:01:30,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:31,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:31,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528400503] [2021-10-21 19:01:31,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:31,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414743913] [2021-10-21 19:01:31,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414743913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:31,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:31,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-21 19:01:31,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444606633] [2021-10-21 19:01:31,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:01:31,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:01:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:01:31,173 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:31,514 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-10-21 19:01:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:01:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-21 19:01:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:31,515 INFO L225 Difference]: With dead ends: 51 [2021-10-21 19:01:31,515 INFO L226 Difference]: Without dead ends: 47 [2021-10-21 19:01:31,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:01:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-21 19:01:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-21 19:01:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:31,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-10-21 19:01:31,526 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2021-10-21 19:01:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:31,527 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-10-21 19:01:31,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:31,527 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-10-21 19:01:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:01:31,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:31,528 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:31,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:31,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:01:31,734 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:31,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:31,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1105530987, now seen corresponding path program 12 times [2021-10-21 19:01:31,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:31,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477443339] [2021-10-21 19:01:31,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:31,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:31,744 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:31,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689868693] [2021-10-21 19:01:31,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:01:31,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:31,746 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:31,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:01:32,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-21 19:01:32,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-21 19:01:32,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:33,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:33,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477443339] [2021-10-21 19:01:33,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:33,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689868693] [2021-10-21 19:01:33,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689868693] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:33,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:33,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-21 19:01:33,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904704978] [2021-10-21 19:01:33,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:01:33,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:33,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:01:33,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:01:33,427 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:34,027 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-10-21 19:01:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:01:34,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-21 19:01:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:34,028 INFO L225 Difference]: With dead ends: 54 [2021-10-21 19:01:34,028 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:01:34,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:01:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:01:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-21 19:01:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-10-21 19:01:34,042 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2021-10-21 19:01:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:34,042 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-10-21 19:01:34,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-10-21 19:01:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-21 19:01:34,043 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:34,043 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:34,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:34,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:01:34,243 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash 153425348, now seen corresponding path program 13 times [2021-10-21 19:01:34,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:34,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226062077] [2021-10-21 19:01:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:34,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:34,254 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:34,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70804655] [2021-10-21 19:01:34,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:01:34,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:34,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:34,273 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:34,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:01:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:01:35,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-21 19:01:35,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:36,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:36,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226062077] [2021-10-21 19:01:36,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:36,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70804655] [2021-10-21 19:01:36,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70804655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:36,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:36,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-21 19:01:36,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988787190] [2021-10-21 19:01:36,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:01:36,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:36,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:01:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:01:36,139 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:36,620 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-10-21 19:01:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:01:36,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-10-21 19:01:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:36,621 INFO L225 Difference]: With dead ends: 57 [2021-10-21 19:01:36,621 INFO L226 Difference]: Without dead ends: 53 [2021-10-21 19:01:36,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:01:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-21 19:01:36,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-21 19:01:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:36,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-10-21 19:01:36,631 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2021-10-21 19:01:36,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:36,631 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-10-21 19:01:36,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:36,632 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-10-21 19:01:36,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-21 19:01:36,632 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:36,633 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:36,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:36,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:01:36,839 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:36,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:36,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2067172661, now seen corresponding path program 14 times [2021-10-21 19:01:36,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:36,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619260688] [2021-10-21 19:01:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:36,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:36,849 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:36,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526338738] [2021-10-21 19:01:36,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:01:36,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:36,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:36,851 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:36,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:01:38,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:01:38,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:38,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-21 19:01:38,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:38,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:38,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619260688] [2021-10-21 19:01:38,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:38,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526338738] [2021-10-21 19:01:38,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526338738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:38,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:38,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-21 19:01:38,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526615331] [2021-10-21 19:01:38,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:01:38,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:01:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:01:38,488 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:38,908 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-10-21 19:01:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:01:38,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-21 19:01:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:38,909 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:01:38,910 INFO L226 Difference]: Without dead ends: 56 [2021-10-21 19:01:38,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:01:38,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-21 19:01:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-21 19:01:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-10-21 19:01:38,919 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2021-10-21 19:01:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:38,920 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-10-21 19:01:38,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-10-21 19:01:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-21 19:01:38,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:38,921 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:38,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:39,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:39,126 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:39,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1177480156, now seen corresponding path program 15 times [2021-10-21 19:01:39,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:39,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914796184] [2021-10-21 19:01:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:39,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:39,136 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:39,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784046179] [2021-10-21 19:01:39,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:01:39,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:39,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:39,142 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:39,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:01:40,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-21 19:01:40,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:40,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-21 19:01:40,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:40,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:40,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914796184] [2021-10-21 19:01:40,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:40,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784046179] [2021-10-21 19:01:40,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784046179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:40,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:40,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-21 19:01:40,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680352529] [2021-10-21 19:01:40,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:01:40,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:01:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:01:40,994 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:41,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:41,581 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-10-21 19:01:41,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:01:41,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-10-21 19:01:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:41,582 INFO L225 Difference]: With dead ends: 63 [2021-10-21 19:01:41,582 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 19:01:41,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:01:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 19:01:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-21 19:01:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-10-21 19:01:41,591 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2021-10-21 19:01:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:41,592 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-10-21 19:01:41,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-10-21 19:01:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:01:41,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:41,593 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:41,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:41,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:41,793 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash -95587627, now seen corresponding path program 16 times [2021-10-21 19:01:41,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:41,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785856124] [2021-10-21 19:01:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:41,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:41,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:41,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094450537] [2021-10-21 19:01:41,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:01:41,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:41,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:41,805 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:41,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:01:42,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:01:42,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:42,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-21 19:01:42,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:43,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:43,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785856124] [2021-10-21 19:01:43,444 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:43,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094450537] [2021-10-21 19:01:43,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094450537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:43,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:43,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-21 19:01:43,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164397737] [2021-10-21 19:01:43,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:01:43,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:43,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:01:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:01:43,447 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:43,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:43,998 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-10-21 19:01:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:01:43,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-21 19:01:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:43,999 INFO L225 Difference]: With dead ends: 66 [2021-10-21 19:01:43,999 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:01:43,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:01:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:01:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-21 19:01:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-10-21 19:01:44,006 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2021-10-21 19:01:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:44,006 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-10-21 19:01:44,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-10-21 19:01:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-21 19:01:44,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:44,007 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:44,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:44,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:44,208 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:44,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1130154628, now seen corresponding path program 17 times [2021-10-21 19:01:44,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:44,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848604988] [2021-10-21 19:01:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:44,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:44,222 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:44,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709722388] [2021-10-21 19:01:44,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:01:44,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:44,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:44,223 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:44,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:01:47,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-21 19:01:47,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-21 19:01:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:48,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:48,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848604988] [2021-10-21 19:01:48,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:48,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709722388] [2021-10-21 19:01:48,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709722388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:48,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:48,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-21 19:01:48,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327417010] [2021-10-21 19:01:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:01:48,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:01:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:01:48,529 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:49,135 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-10-21 19:01:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:01:49,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-10-21 19:01:49,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:49,155 INFO L225 Difference]: With dead ends: 69 [2021-10-21 19:01:49,155 INFO L226 Difference]: Without dead ends: 65 [2021-10-21 19:01:49,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:01:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-21 19:01:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-21 19:01:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-10-21 19:01:49,165 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2021-10-21 19:01:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:49,165 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-10-21 19:01:49,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-10-21 19:01:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-21 19:01:49,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:49,167 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:49,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:49,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:49,375 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:49,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1405722741, now seen corresponding path program 18 times [2021-10-21 19:01:49,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:49,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288700392] [2021-10-21 19:01:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:49,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:49,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:49,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457784450] [2021-10-21 19:01:49,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:01:49,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:49,394 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:49,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:01:51,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-21 19:01:51,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:51,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-21 19:01:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:52,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:52,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288700392] [2021-10-21 19:01:52,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:52,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457784450] [2021-10-21 19:01:52,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457784450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:52,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:52,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-10-21 19:01:52,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758714583] [2021-10-21 19:01:52,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:01:52,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:52,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:01:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:01:52,231 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:52,873 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-10-21 19:01:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:01:52,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-10-21 19:01:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:52,874 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:01:52,874 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 19:01:52,875 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:01:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 19:01:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-21 19:01:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-10-21 19:01:52,884 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2021-10-21 19:01:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:52,884 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-10-21 19:01:52,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-10-21 19:01:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-21 19:01:52,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:52,885 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:52,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:53,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:01:53,092 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:53,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1122092828, now seen corresponding path program 19 times [2021-10-21 19:01:53,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:53,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077194267] [2021-10-21 19:01:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:53,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:53,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:53,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287225346] [2021-10-21 19:01:53,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:01:53,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:53,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:53,102 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:53,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:01:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:01:54,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-21 19:01:54,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:54,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:54,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077194267] [2021-10-21 19:01:54,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:54,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287225346] [2021-10-21 19:01:54,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287225346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:54,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:54,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-10-21 19:01:54,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009061125] [2021-10-21 19:01:54,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 19:01:54,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:01:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:01:54,835 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:55,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:55,493 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-10-21 19:01:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:01:55,493 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-10-21 19:01:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:55,494 INFO L225 Difference]: With dead ends: 75 [2021-10-21 19:01:55,494 INFO L226 Difference]: Without dead ends: 71 [2021-10-21 19:01:55,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:01:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-21 19:01:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-21 19:01:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-10-21 19:01:55,502 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2021-10-21 19:01:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:55,503 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-10-21 19:01:55,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-10-21 19:01:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-21 19:01:55,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:55,504 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:55,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:01:55,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:55,712 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash 680859157, now seen corresponding path program 20 times [2021-10-21 19:01:55,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:55,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437903650] [2021-10-21 19:01:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:55,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:55,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:55,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635388375] [2021-10-21 19:01:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:01:55,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:55,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:55,743 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:55,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:01:56,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:01:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:01:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-21 19:01:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:01:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:01:57,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:01:57,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437903650] [2021-10-21 19:01:57,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:01:57,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635388375] [2021-10-21 19:01:57,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635388375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:01:57,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:01:57,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-10-21 19:01:57,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348500660] [2021-10-21 19:01:57,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:01:57,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:01:57,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:01:57,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:01:58,000 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:01:59,238 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-10-21 19:01:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:01:59,239 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-10-21 19:01:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:01:59,239 INFO L225 Difference]: With dead ends: 78 [2021-10-21 19:01:59,239 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 19:01:59,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 965.9ms TimeCoverageRelationStatistics Valid=208, Invalid=2144, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:01:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 19:01:59,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-21 19:01:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-10-21 19:01:59,251 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2021-10-21 19:01:59,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:01:59,252 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-10-21 19:01:59,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:01:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-10-21 19:01:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-21 19:01:59,253 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:01:59,253 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:01:59,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-21 19:01:59,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:01:59,458 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:01:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:01:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash -437559484, now seen corresponding path program 21 times [2021-10-21 19:01:59,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:01:59,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285035840] [2021-10-21 19:01:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:01:59,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:01:59,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-21 19:01:59,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598995146] [2021-10-21 19:01:59,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:01:59,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:01:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:01:59,490 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:01:59,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:02:00,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-10-21 19:02:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:02:00,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 19:02:00,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:02:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 693 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:01,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:01,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285035840] [2021-10-21 19:02:01,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-21 19:02:01,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598995146] [2021-10-21 19:02:01,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598995146] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:02:01,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:02:01,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-10-21 19:02:01,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374609666] [2021-10-21 19:02:01,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:02:01,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:01,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:02:01,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:02:01,664 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:02:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:02,244 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-10-21 19:02:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 19:02:02,245 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-10-21 19:02:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:02,245 INFO L225 Difference]: With dead ends: 74 [2021-10-21 19:02:02,245 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:02:02,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 832.5ms TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 19:02:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:02:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:02:02,247 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) [2021-10-21 19:02:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:02:02,247 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-10-21 19:02:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:02,247 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:02:02,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:02:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:02:02,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:02:02,251 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:02:02,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:02:02,252 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:02:02,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:02:02,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:02:02,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 19:02:02,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:02:02,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:02:02,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:02:02,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:02:02,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 19:02:04,108 INFO L853 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= ULTIMATE.start_main_~k~0 20)) (.cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse2 (= (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (* 4 ULTIMATE.start_main_~x~0)))) (or (and (= ULTIMATE.start_main_~y~0 0) (<= 0 ULTIMATE.start_main_~k~0) .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~c~0 0)) (and (< 19 ULTIMATE.start_main_~k~0) (= ULTIMATE.start_main_~y~0 20) .cse0 .cse1 .cse3 .cse2 (<= 20 ULTIMATE.start_main_~c~0)) (and .cse0 .cse1 (< ULTIMATE.start_main_~c~0 (+ ULTIMATE.start_main_~k~0 1)) .cse3 (= ULTIMATE.start_main_~y~0 1) (= ULTIMATE.start_main_~c~0 1) .cse2) (and .cse0 .cse1 .cse3 (< 17 ULTIMATE.start_main_~k~0) (= ULTIMATE.start_main_~y~0 18) .cse2 (= ULTIMATE.start_main_~c~0 18)) (and .cse0 .cse1 (= ULTIMATE.start_main_~y~0 3) .cse3 (= ULTIMATE.start_main_~c~0 3) .cse2 (< 2 ULTIMATE.start_main_~k~0)) (and (= ULTIMATE.start_main_~c~0 2) .cse0 .cse1 (< 1 ULTIMATE.start_main_~k~0) .cse3 .cse2 (= ULTIMATE.start_main_~y~0 2)) (and .cse0 (< 18 ULTIMATE.start_main_~k~0) .cse1 .cse3 (<= ULTIMATE.start_main_~c~0 19) .cse2 (= 19 ULTIMATE.start_main_~y~0) (<= 19 ULTIMATE.start_main_~c~0)) (and .cse0 .cse1 .cse3 (= ULTIMATE.start_main_~c~0 17) (= ULTIMATE.start_main_~y~0 17) (< 16 ULTIMATE.start_main_~k~0) .cse2) (and (= ULTIMATE.start_main_~y~0 9) .cse0 .cse1 (= ULTIMATE.start_main_~c~0 9) .cse3 (< 8 ULTIMATE.start_main_~k~0) .cse2) (and .cse0 .cse1 .cse3 .cse2 (= ULTIMATE.start_main_~y~0 12) (< 11 ULTIMATE.start_main_~k~0) (= ULTIMATE.start_main_~c~0 12)) (and .cse0 .cse1 (< 6 ULTIMATE.start_main_~k~0) .cse3 (= ULTIMATE.start_main_~c~0 7) (= ULTIMATE.start_main_~y~0 7) .cse2) (and (= ULTIMATE.start_main_~y~0 11) .cse0 .cse1 .cse3 (= ULTIMATE.start_main_~c~0 11) .cse2 (< 10 ULTIMATE.start_main_~k~0)) (and (< 13 ULTIMATE.start_main_~k~0) .cse0 .cse1 .cse3 .cse2 (= ULTIMATE.start_main_~c~0 14) (= ULTIMATE.start_main_~y~0 14)) (and .cse0 .cse1 .cse3 (= ULTIMATE.start_main_~c~0 16) .cse2 (< 15 ULTIMATE.start_main_~k~0) (= ULTIMATE.start_main_~y~0 16)) (and .cse0 .cse1 .cse3 (= ULTIMATE.start_main_~c~0 6) (< 5 ULTIMATE.start_main_~k~0) .cse2 (= ULTIMATE.start_main_~y~0 6)) (and .cse0 .cse1 .cse3 (< 9 ULTIMATE.start_main_~k~0) .cse2 (= ULTIMATE.start_main_~y~0 10) (= ULTIMATE.start_main_~c~0 10)) (and (< 14 ULTIMATE.start_main_~k~0) .cse0 (= ULTIMATE.start_main_~y~0 15) .cse1 .cse3 .cse2 (= ULTIMATE.start_main_~c~0 15)) (and .cse0 (< 3 ULTIMATE.start_main_~k~0) .cse1 .cse3 .cse2 (= ULTIMATE.start_main_~y~0 4) (= ULTIMATE.start_main_~c~0 4)) (and (< 7 ULTIMATE.start_main_~k~0) .cse0 .cse1 (= ULTIMATE.start_main_~y~0 8) .cse3 .cse2 (= ULTIMATE.start_main_~c~0 8)) (and .cse0 .cse1 (= ULTIMATE.start_main_~y~0 13) .cse3 (< 12 ULTIMATE.start_main_~k~0) .cse2 (= ULTIMATE.start_main_~c~0 13)) (and .cse0 (< 4 ULTIMATE.start_main_~k~0) .cse1 (= ULTIMATE.start_main_~y~0 5) .cse3 (= ULTIMATE.start_main_~c~0 5) .cse2))) [2021-10-21 19:02:04,109 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-21 19:02:04,109 INFO L857 garLoopResultBuilder]: For program point L27-3(lines 27 36) no Hoare annotation was computed. [2021-10-21 19:02:04,109 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-10-21 19:02:04,109 INFO L857 garLoopResultBuilder]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2021-10-21 19:02:04,109 INFO L857 garLoopResultBuilder]: For program point L11-2(lines 11 12) no Hoare annotation was computed. [2021-10-21 19:02:04,109 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-21 19:02:04,110 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 19:02:04,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 19:02:04,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 19:02:04,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-21 19:02:04,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 19:02:04,110 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-21 19:02:04,110 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-10-21 19:02:04,111 INFO L853 garLoopResultBuilder]: At program point L10-2(lines 30 31) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= ULTIMATE.start_main_~k~0 20)) (.cse2 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse3 (= (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (* 4 ULTIMATE.start_main_~x~0)))) (or (and (< 19 ULTIMATE.start_main_~k~0) (= ULTIMATE.start_main_~y~0 20) .cse0 .cse1 .cse2 .cse3 (<= 20 ULTIMATE.start_main_~c~0)) (and .cse0 .cse1 (< ULTIMATE.start_main_~c~0 (+ ULTIMATE.start_main_~k~0 1)) .cse2 (= ULTIMATE.start_main_~y~0 1) (= ULTIMATE.start_main_~c~0 1) .cse3) (and .cse0 .cse1 .cse2 (< 17 ULTIMATE.start_main_~k~0) (= ULTIMATE.start_main_~y~0 18) .cse3 (= ULTIMATE.start_main_~c~0 18)) (and .cse0 .cse1 (= ULTIMATE.start_main_~y~0 3) .cse2 (= ULTIMATE.start_main_~c~0 3) .cse3 (< 2 ULTIMATE.start_main_~k~0)) (and (= ULTIMATE.start_main_~c~0 2) .cse0 .cse1 (< 1 ULTIMATE.start_main_~k~0) .cse2 .cse3 (= ULTIMATE.start_main_~y~0 2)) (and .cse0 (< 18 ULTIMATE.start_main_~k~0) .cse1 .cse2 (<= ULTIMATE.start_main_~c~0 19) .cse3 (= 19 ULTIMATE.start_main_~y~0) (<= 19 ULTIMATE.start_main_~c~0)) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~c~0 17) (= ULTIMATE.start_main_~y~0 17) (< 16 ULTIMATE.start_main_~k~0) .cse3) (and (= ULTIMATE.start_main_~y~0 9) .cse0 .cse1 (= ULTIMATE.start_main_~c~0 9) .cse2 (< 8 ULTIMATE.start_main_~k~0) .cse3) (and .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~y~0 12) (< 11 ULTIMATE.start_main_~k~0) (= ULTIMATE.start_main_~c~0 12)) (and .cse0 .cse1 (< 6 ULTIMATE.start_main_~k~0) .cse2 (= ULTIMATE.start_main_~c~0 7) (= ULTIMATE.start_main_~y~0 7) .cse3) (and (= ULTIMATE.start_main_~y~0 11) .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~c~0 11) .cse3 (< 10 ULTIMATE.start_main_~k~0)) (and (< 13 ULTIMATE.start_main_~k~0) .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~c~0 14) (= ULTIMATE.start_main_~y~0 14)) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~c~0 16) .cse3 (< 15 ULTIMATE.start_main_~k~0) (= ULTIMATE.start_main_~y~0 16)) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~c~0 6) (< 5 ULTIMATE.start_main_~k~0) .cse3 (= ULTIMATE.start_main_~y~0 6)) (and .cse0 .cse1 .cse2 (< 9 ULTIMATE.start_main_~k~0) .cse3 (= ULTIMATE.start_main_~y~0 10) (= ULTIMATE.start_main_~c~0 10)) (and (< 14 ULTIMATE.start_main_~k~0) .cse0 (= ULTIMATE.start_main_~y~0 15) .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~c~0 15)) (and .cse0 (< 3 ULTIMATE.start_main_~k~0) .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~y~0 4) (= ULTIMATE.start_main_~c~0 4)) (and (< 7 ULTIMATE.start_main_~k~0) .cse0 .cse1 (= ULTIMATE.start_main_~y~0 8) .cse2 .cse3 (= ULTIMATE.start_main_~c~0 8)) (and .cse0 .cse1 (= ULTIMATE.start_main_~y~0 13) .cse2 (< 12 ULTIMATE.start_main_~k~0) .cse3 (= ULTIMATE.start_main_~c~0 13)) (and (= ULTIMATE.start_main_~y~0 0) (<= 0 ULTIMATE.start_main_~k~0) .cse0 .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~c~0 0)) (and .cse0 (< 4 ULTIMATE.start_main_~k~0) .cse1 (= ULTIMATE.start_main_~y~0 5) .cse2 (= ULTIMATE.start_main_~c~0 5) .cse3))) [2021-10-21 19:02:04,111 INFO L857 garLoopResultBuilder]: For program point L10-3(lines 10 13) no Hoare annotation was computed. [2021-10-21 19:02:04,111 INFO L860 garLoopResultBuilder]: At program point L39(lines 17 40) the Hoare annotation is: true [2021-10-21 19:02:04,111 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-21 19:02:04,111 INFO L853 garLoopResultBuilder]: At program point L10-5(lines 9 15) the Hoare annotation is: (= (+ (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (* 2 (* ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (* 4 ULTIMATE.start_main_~x~0)) [2021-10-21 19:02:04,111 INFO L857 garLoopResultBuilder]: For program point L10-6(lines 10 13) no Hoare annotation was computed. [2021-10-21 19:02:04,111 INFO L860 garLoopResultBuilder]: At program point L10-8(lines 9 15) the Hoare annotation is: true [2021-10-21 19:02:04,115 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:02:04,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:02:04 BoogieIcfgContainer [2021-10-21 19:02:04,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:02:04,158 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:02:04,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:02:04,159 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:02:04,159 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:01:14" (3/4) ... [2021-10-21 19:02:04,162 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:02:04,172 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-21 19:02:04,173 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:02:04,173 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:02:04,173 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:02:04,214 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:02:04,214 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:02:04,216 INFO L168 Benchmark]: Toolchain (without parser) took 50453.72 ms. Allocated memory was 127.9 MB in the beginning and 172.0 MB in the end (delta: 44.0 MB). Free memory was 89.1 MB in the beginning and 101.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:02:04,216 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 127.9 MB. Free memory was 105.3 MB in the beginning and 105.3 MB in the end (delta: 69.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:02:04,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.26 ms. Allocated memory is still 127.9 MB. Free memory was 88.9 MB in the beginning and 103.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:02:04,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.88 ms. Allocated memory is still 127.9 MB. Free memory was 103.0 MB in the beginning and 101.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:02:04,218 INFO L168 Benchmark]: Boogie Preprocessor took 39.18 ms. Allocated memory is still 127.9 MB. Free memory was 101.3 MB in the beginning and 100.4 MB in the end (delta: 896.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:02:04,218 INFO L168 Benchmark]: RCFGBuilder took 292.51 ms. Allocated memory is still 127.9 MB. Free memory was 100.4 MB in the beginning and 90.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:02:04,219 INFO L168 Benchmark]: TraceAbstraction took 49747.33 ms. Allocated memory was 127.9 MB in the beginning and 172.0 MB in the end (delta: 44.0 MB). Free memory was 89.9 MB in the beginning and 105.4 MB in the end (delta: -15.5 MB). Peak memory consumption was 94.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:02:04,219 INFO L168 Benchmark]: Witness Printer took 56.16 ms. Allocated memory is still 172.0 MB. Free memory was 105.4 MB in the beginning and 101.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:02:04,222 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 127.9 MB. Free memory was 105.3 MB in the beginning and 105.3 MB in the end (delta: 69.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.26 ms. Allocated memory is still 127.9 MB. Free memory was 88.9 MB in the beginning and 103.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.88 ms. Allocated memory is still 127.9 MB. Free memory was 103.0 MB in the beginning and 101.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.18 ms. Allocated memory is still 127.9 MB. Free memory was 101.3 MB in the beginning and 100.4 MB in the end (delta: 896.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 292.51 ms. Allocated memory is still 127.9 MB. Free memory was 100.4 MB in the beginning and 90.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 49747.33 ms. Allocated memory was 127.9 MB in the beginning and 172.0 MB in the end (delta: 44.0 MB). Free memory was 89.9 MB in the beginning and 105.4 MB in the end (delta: -15.5 MB). Peak memory consumption was 94.8 MB. Max. memory is 16.1 GB. * Witness Printer took 56.16 ms. Allocated memory is still 172.0 MB. Free memory was 105.4 MB in the beginning and 101.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: 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 1 procedures, 21 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 49604.0ms, OverallIterations: 26, TraceHistogramMax: 22, EmptinessCheckTime: 52.9ms, AutomataDifference: 10330.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1646.8ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 466 SDtfs, 214 SDslu, 4584 SDs, 0 SdLazy, 9148 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7111.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1020 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 4921.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=25, InterpolantAutomatonStates: 368, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 206.3ms AutomataMinimizationTime, 26 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 53 NumberOfFragments, 1626 HoareAnnotationTreeSize, 5 FomulaSimplifications, 2913 FormulaSimplificationTreeSizeReduction, 190.1ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 534 FormulaSimplificationTreeSizeReductionInter, 1448.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 223.1ms SsaConstructionTime, 14757.3ms SatisfiabilityAnalysisTime, 10919.8ms InterpolantComputationTime, 956 NumberOfCodeBlocks, 947 NumberOfCodeBlocksAsserted, 150 NumberOfCheckSat, 930 ConstructedInterpolants, 0 QuantifiedInterpolants, 6988 SizeOfPredicates, 102 NumberOfNonLiveVariables, 4172 ConjunctsInSsa, 1070 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 707/5337 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 3 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((19 < k && y == 20) && cond == 1) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 20 <= c) || ((((((cond == 1 && k <= 20) && c < k + 1) && 1 == cond) && y == 1) && c == 1) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x)) || ((((((cond == 1 && k <= 20) && 1 == cond) && 17 < k) && y == 18) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 18)) || ((((((cond == 1 && k <= 20) && y == 3) && 1 == cond) && c == 3) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 2 < k)) || ((((((c == 2 && cond == 1) && k <= 20) && 1 < k) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 2)) || (((((((cond == 1 && 18 < k) && k <= 20) && 1 == cond) && c <= 19) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 19 == y) && 19 <= c)) || ((((((cond == 1 && k <= 20) && 1 == cond) && c == 17) && y == 17) && 16 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x)) || ((((((y == 9 && cond == 1) && k <= 20) && c == 9) && 1 == cond) && 8 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x)) || ((((((cond == 1 && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 12) && 11 < k) && c == 12)) || ((((((cond == 1 && k <= 20) && 6 < k) && 1 == cond) && c == 7) && y == 7) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x)) || ((((((y == 11 && cond == 1) && k <= 20) && 1 == cond) && c == 11) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 10 < k)) || ((((((13 < k && cond == 1) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 14) && y == 14)) || ((((((cond == 1 && k <= 20) && 1 == cond) && c == 16) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 15 < k) && y == 16)) || ((((((cond == 1 && k <= 20) && 1 == cond) && c == 6) && 5 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 6)) || ((((((cond == 1 && k <= 20) && 1 == cond) && 9 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 10) && c == 10)) || ((((((14 < k && cond == 1) && y == 15) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 15)) || ((((((cond == 1 && 3 < k) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 4) && c == 4)) || ((((((7 < k && cond == 1) && k <= 20) && y == 8) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 8)) || ((((((cond == 1 && k <= 20) && y == 13) && 1 == cond) && 12 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 13)) || ((((((y == 0 && 0 <= k) && cond == 1) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 0)) || ((((((cond == 1 && 4 < k) && k <= 20) && y == 5) && 1 == cond) && c == 5) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: y * y * y * y + y * y + 2 * (y * y * y) == 4 * x - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((y == 0 && 0 <= k) && cond == 1) && k <= 20) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 0) || ((((((19 < k && y == 20) && cond == 1) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 20 <= c)) || ((((((cond == 1 && k <= 20) && c < k + 1) && 1 == cond) && y == 1) && c == 1) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x)) || ((((((cond == 1 && k <= 20) && 1 == cond) && 17 < k) && y == 18) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 18)) || ((((((cond == 1 && k <= 20) && y == 3) && 1 == cond) && c == 3) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 2 < k)) || ((((((c == 2 && cond == 1) && k <= 20) && 1 < k) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 2)) || (((((((cond == 1 && 18 < k) && k <= 20) && 1 == cond) && c <= 19) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 19 == y) && 19 <= c)) || ((((((cond == 1 && k <= 20) && 1 == cond) && c == 17) && y == 17) && 16 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x)) || ((((((y == 9 && cond == 1) && k <= 20) && c == 9) && 1 == cond) && 8 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x)) || ((((((cond == 1 && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 12) && 11 < k) && c == 12)) || ((((((cond == 1 && k <= 20) && 6 < k) && 1 == cond) && c == 7) && y == 7) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x)) || ((((((y == 11 && cond == 1) && k <= 20) && 1 == cond) && c == 11) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 10 < k)) || ((((((13 < k && cond == 1) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 14) && y == 14)) || ((((((cond == 1 && k <= 20) && 1 == cond) && c == 16) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && 15 < k) && y == 16)) || ((((((cond == 1 && k <= 20) && 1 == cond) && c == 6) && 5 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 6)) || ((((((cond == 1 && k <= 20) && 1 == cond) && 9 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 10) && c == 10)) || ((((((14 < k && cond == 1) && y == 15) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 15)) || ((((((cond == 1 && 3 < k) && k <= 20) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && y == 4) && c == 4)) || ((((((7 < k && cond == 1) && k <= 20) && y == 8) && 1 == cond) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 8)) || ((((((cond == 1 && k <= 20) && y == 13) && 1 == cond) && 12 < k) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) && c == 13)) || ((((((cond == 1 && 4 < k) && k <= 20) && y == 5) && 1 == cond) && c == 5) && y * y * y * y + y * y + 2 * (y * y * y) == 4 * x) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-21 19:02:04,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a04074ac-d00a-4316-bd35-441cac5e7be2/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...