./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD --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 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:24:58,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:24:58,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:24:58,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:24:58,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:24:58,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:24:58,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:24:58,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:24:58,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:24:58,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:24:58,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:24:58,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:24:58,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:24:58,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:24:58,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:24:58,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:24:58,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:24:58,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:24:58,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:24:58,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:24:58,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:24:58,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:24:58,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:24:58,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:24:58,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:24:58,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:24:58,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:24:58,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:24:58,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:24:58,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:24:58,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:24:58,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:24:58,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:24:58,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:24:58,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:24:58,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:24:58,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:24:58,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:24:58,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:24:58,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:24:58,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:24:58,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:24:58,982 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:24:58,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:24:58,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:24:58,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:24:58,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:24:58,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:24:58,985 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:24:58,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:24:58,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:24:58,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:24:58,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:24:58,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:24:58,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:24:58,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:24:58,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:24:58,988 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:24:58,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:24:58,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:24:58,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:24:58,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:24:58,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:24:58,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:24:58,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:24:58,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:24:59,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:24:59,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:24:59,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:24:59,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:24:59,003 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:24:59,003 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:24:59,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:24:59,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:24:59,005 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_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20f9ce6814caacb533e5bf2143ac3e067387f11238548a0b9b41e2de8e2cc436 [2021-10-28 23:24:59,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:24:59,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:24:59,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:24:59,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:24:59,349 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:24:59,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-10-28 23:24:59,449 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/data/25207f48a/5070eb6ce9f34ebb95dd2607d2d829e8/FLAGe758db924 [2021-10-28 23:24:59,977 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:24:59,978 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c [2021-10-28 23:24:59,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/data/25207f48a/5070eb6ce9f34ebb95dd2607d2d829e8/FLAGe758db924 [2021-10-28 23:25:00,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/data/25207f48a/5070eb6ce9f34ebb95dd2607d2d829e8 [2021-10-28 23:25:00,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:25:00,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:25:00,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:25:00,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:25:00,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:25:00,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4450321f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00, skipping insertion in model container [2021-10-28 23:25:00,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:25:00,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:25:00,594 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_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2021-10-28 23:25:00,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:25:00,653 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:25:00,685 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_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2021-10-28 23:25:00,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:25:00,733 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:25:00,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00 WrapperNode [2021-10-28 23:25:00,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:25:00,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:25:00,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:25:00,740 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:25:00,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:25:00,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:25:00,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:25:00,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:25:00,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:25:00,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:25:00,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:25:00,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:25:00,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (1/1) ... [2021-10-28 23:25:00,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:25:00,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:00,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:25:00,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:25:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:25:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:25:00,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:25:00,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:25:01,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:25:01,388 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-10-28 23:25:01,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:25:01 BoogieIcfgContainer [2021-10-28 23:25:01,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:25:01,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:25:01,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:25:01,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:25:01,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:25:00" (1/3) ... [2021-10-28 23:25:01,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4138b3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:25:01, skipping insertion in model container [2021-10-28 23:25:01,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:25:00" (2/3) ... [2021-10-28 23:25:01,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4138b3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:25:01, skipping insertion in model container [2021-10-28 23:25:01,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:25:01" (3/3) ... [2021-10-28 23:25:01,421 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2021-10-28 23:25:01,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:25:01,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-28 23:25:01,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:25:01,528 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 [2021-10-28 23:25:01,546 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-28 23:25:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 43 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) [2021-10-28 23:25:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:25:01,582 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:01,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:01,584 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash -144177098, now seen corresponding path program 1 times [2021-10-28 23:25:01,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:01,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57255098] [2021-10-28 23:25:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:01,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:01,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:01,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57255098] [2021-10-28 23:25:01,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57255098] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:01,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:01,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 23:25:01,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323176308] [2021-10-28 23:25:01,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:25:01,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:25:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:25:01,823 INFO L87 Difference]: Start difference. First operand has 44 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 43 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2021-10-28 23:25:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:01,848 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2021-10-28 23:25:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:25:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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 [2021-10-28 23:25:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:01,861 INFO L225 Difference]: With dead ends: 85 [2021-10-28 23:25:01,861 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 23:25:01,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:25:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 23:25:01,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 23:25:01,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 39 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) [2021-10-28 23:25:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-10-28 23:25:01,912 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 13 [2021-10-28 23:25:01,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:01,914 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-10-28 23:25:01,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2021-10-28 23:25:01,915 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-10-28 23:25:01,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 23:25:01,916 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:01,917 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:01,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:25:01,918 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1281167042, now seen corresponding path program 1 times [2021-10-28 23:25:01,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:01,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255863697] [2021-10-28 23:25:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:01,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:01,982 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:01,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969010887] [2021-10-28 23:25:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:01,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:01,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:01,986 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:02,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:25:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:25:02,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:02,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:02,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255863697] [2021-10-28 23:25:02,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:02,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969010887] [2021-10-28 23:25:02,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969010887] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:02,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:02,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:25:02,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579597269] [2021-10-28 23:25:02,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:02,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:02,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:02,268 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-10-28 23:25:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:02,364 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-10-28 23:25:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 [2021-10-28 23:25:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:02,367 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:25:02,367 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:25:02,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:25:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-10-28 23:25:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.297872340425532) internal successors, (61), 53 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) [2021-10-28 23:25:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-10-28 23:25:02,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 13 [2021-10-28 23:25:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:02,379 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-10-28 23:25:02,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-10-28 23:25:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-10-28 23:25:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 23:25:02,381 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:02,381 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:02,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:02,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:02,607 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1454243009, now seen corresponding path program 1 times [2021-10-28 23:25:02,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:02,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324393768] [2021-10-28 23:25:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:02,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:02,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:02,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990697537] [2021-10-28 23:25:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:02,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:02,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:02,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:02,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:25:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:25:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:03,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:03,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324393768] [2021-10-28 23:25:03,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:03,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990697537] [2021-10-28 23:25:03,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990697537] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:03,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:03,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:25:03,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600817312] [2021-10-28 23:25:03,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:03,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:03,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:03,175 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:03,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:03,441 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-10-28 23:25:03,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:25:03,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 23:25:03,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:03,445 INFO L225 Difference]: With dead ends: 66 [2021-10-28 23:25:03,445 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 23:25:03,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:25:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 23:25:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2021-10-28 23:25:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-10-28 23:25:03,453 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 15 [2021-10-28 23:25:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:03,453 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-10-28 23:25:03,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-10-28 23:25:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 23:25:03,457 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:03,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:03,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:03,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:03,681 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:03,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1663317220, now seen corresponding path program 1 times [2021-10-28 23:25:03,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:03,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702602788] [2021-10-28 23:25:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:03,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:03,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:03,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126130295] [2021-10-28 23:25:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:03,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:03,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:03,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:03,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:25:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:25:03,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:04,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:04,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702602788] [2021-10-28 23:25:04,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:04,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126130295] [2021-10-28 23:25:04,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126130295] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:04,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:04,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 23:25:04,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177567192] [2021-10-28 23:25:04,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:04,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:04,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:04,114 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-10-28 23:25:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:04,304 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-10-28 23:25:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:25:04,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-28 23:25:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:04,306 INFO L225 Difference]: With dead ends: 100 [2021-10-28 23:25:04,306 INFO L226 Difference]: Without dead ends: 92 [2021-10-28 23:25:04,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:25:04,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-28 23:25:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-10-28 23:25:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-10-28 23:25:04,318 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 17 [2021-10-28 23:25:04,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:04,319 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-10-28 23:25:04,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-10-28 23:25:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-10-28 23:25:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 23:25:04,320 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:04,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:04,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:04,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:04,543 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:04,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:04,544 INFO L85 PathProgramCache]: Analyzing trace with hash 850548497, now seen corresponding path program 1 times [2021-10-28 23:25:04,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:04,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990238077] [2021-10-28 23:25:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:04,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:04,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:04,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387318319] [2021-10-28 23:25:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:04,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:04,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:04,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:04,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:25:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:04,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:25:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:04,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:04,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:04,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990238077] [2021-10-28 23:25:04,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:04,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387318319] [2021-10-28 23:25:04,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387318319] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:04,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:04,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:25:04,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078534905] [2021-10-28 23:25:04,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:04,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:04,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:04,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:04,739 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:04,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:04,780 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-10-28 23:25:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:04,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 23:25:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:04,783 INFO L225 Difference]: With dead ends: 80 [2021-10-28 23:25:04,783 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 23:25:04,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 23:25:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-28 23:25:04,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.25) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-10-28 23:25:04,794 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 20 [2021-10-28 23:25:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:04,794 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-10-28 23:25:04,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:04,795 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-10-28 23:25:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 23:25:04,795 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:04,796 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:04,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-28 23:25:05,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:05,011 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:05,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:05,011 INFO L85 PathProgramCache]: Analyzing trace with hash 598788611, now seen corresponding path program 1 times [2021-10-28 23:25:05,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:05,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685387417] [2021-10-28 23:25:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:05,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:05,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:05,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279709314] [2021-10-28 23:25:05,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:05,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:05,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:05,027 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:05,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:25:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:25:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:25:05,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:05,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685387417] [2021-10-28 23:25:05,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:05,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279709314] [2021-10-28 23:25:05,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279709314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:05,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:05,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-28 23:25:05,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913865679] [2021-10-28 23:25:05,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:25:05,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:05,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:25:05,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:25:05,311 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:05,364 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-10-28 23:25:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-28 23:25:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:05,365 INFO L225 Difference]: With dead ends: 86 [2021-10-28 23:25:05,365 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 23:25:05,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:25:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 23:25:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2021-10-28 23:25:05,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-10-28 23:25:05,374 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 21 [2021-10-28 23:25:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:05,375 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-10-28 23:25:05,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-10-28 23:25:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:25:05,376 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:05,376 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:05,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:05,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 23:25:05,597 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:05,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:05,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1333477300, now seen corresponding path program 1 times [2021-10-28 23:25:05,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:05,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363150264] [2021-10-28 23:25:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:05,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:05,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:05,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034336770] [2021-10-28 23:25:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:05,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:05,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:05,613 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:05,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:25:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:05,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:25:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:05,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:05,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363150264] [2021-10-28 23:25:05,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:05,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034336770] [2021-10-28 23:25:05,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034336770] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:25:05,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:25:05,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 23:25:05,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072362016] [2021-10-28 23:25:05,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:25:05,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:25:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:05,838 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-10-28 23:25:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:05,981 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-10-28 23:25:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:25:05,982 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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 [2021-10-28 23:25:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:05,983 INFO L225 Difference]: With dead ends: 80 [2021-10-28 23:25:05,983 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 23:25:05,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 23:25:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-10-28 23:25:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.2) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-10-28 23:25:06,002 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 22 [2021-10-28 23:25:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:06,003 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-10-28 23:25:06,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 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) [2021-10-28 23:25:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-10-28 23:25:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 23:25:06,004 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:06,004 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:06,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:06,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-28 23:25:06,210 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:06,211 INFO L85 PathProgramCache]: Analyzing trace with hash -89606074, now seen corresponding path program 1 times [2021-10-28 23:25:06,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:06,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884412365] [2021-10-28 23:25:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:06,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:06,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:06,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142657127] [2021-10-28 23:25:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:06,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:06,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:06,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:06,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:25:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:25:06,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:06,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:06,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884412365] [2021-10-28 23:25:06,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:06,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142657127] [2021-10-28 23:25:06,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142657127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:06,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:06,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:06,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137799139] [2021-10-28 23:25:06,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:06,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:06,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:06,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:06,731 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2021-10-28 23:25:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:06,991 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2021-10-28 23:25:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:25:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-28 23:25:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:06,992 INFO L225 Difference]: With dead ends: 105 [2021-10-28 23:25:06,992 INFO L226 Difference]: Without dead ends: 103 [2021-10-28 23:25:06,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-28 23:25:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-10-28 23:25:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 73 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-10-28 23:25:07,003 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 23 [2021-10-28 23:25:07,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:07,004 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-10-28 23:25:07,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2021-10-28 23:25:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-10-28 23:25:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 23:25:07,005 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:07,005 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:07,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:07,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:07,223 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:07,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1021281049, now seen corresponding path program 1 times [2021-10-28 23:25:07,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:07,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18911243] [2021-10-28 23:25:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:07,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:07,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:07,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270641714] [2021-10-28 23:25:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:07,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:07,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:07,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:07,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:25:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:07,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:25:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:07,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:07,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18911243] [2021-10-28 23:25:07,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:07,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270641714] [2021-10-28 23:25:07,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270641714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:07,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:07,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:07,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418417048] [2021-10-28 23:25:07,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:07,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:07,808 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2021-10-28 23:25:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:07,969 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-10-28 23:25:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:07,969 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 [2021-10-28 23:25:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:07,970 INFO L225 Difference]: With dead ends: 116 [2021-10-28 23:25:07,971 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 23:25:07,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 23:25:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2021-10-28 23:25:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 95 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2021-10-28 23:25:07,984 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 25 [2021-10-28 23:25:07,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:07,984 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2021-10-28 23:25:07,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2021-10-28 23:25:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2021-10-28 23:25:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:25:07,986 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:07,986 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:08,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:08,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:08,203 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:08,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash 477321350, now seen corresponding path program 1 times [2021-10-28 23:25:08,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:08,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243964848] [2021-10-28 23:25:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:08,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:08,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:08,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689843957] [2021-10-28 23:25:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:08,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:08,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:08,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:08,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:25:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:25:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:08,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:08,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243964848] [2021-10-28 23:25:08,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:08,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689843957] [2021-10-28 23:25:08,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689843957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:08,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:08,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:25:08,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987325933] [2021-10-28 23:25:08,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:25:08,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:25:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:08,701 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-28 23:25:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:08,834 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2021-10-28 23:25:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:25:08,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-28 23:25:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:08,835 INFO L225 Difference]: With dead ends: 116 [2021-10-28 23:25:08,835 INFO L226 Difference]: Without dead ends: 106 [2021-10-28 23:25:08,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-28 23:25:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2021-10-28 23:25:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 102 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-10-28 23:25:08,858 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 29 [2021-10-28 23:25:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:08,858 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-10-28 23:25:08,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-28 23:25:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-10-28 23:25:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 23:25:08,859 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:08,860 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:08,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:09,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:09,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:09,079 INFO L85 PathProgramCache]: Analyzing trace with hash 219215494, now seen corresponding path program 2 times [2021-10-28 23:25:09,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:09,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959517455] [2021-10-28 23:25:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:09,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:09,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:09,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033202426] [2021-10-28 23:25:09,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:09,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:09,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:09,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:09,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:25:09,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:09,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:09,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:25:09,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:09,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:09,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959517455] [2021-10-28 23:25:09,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:09,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033202426] [2021-10-28 23:25:09,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033202426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:09,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:09,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:25:09,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927511825] [2021-10-28 23:25:09,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:25:09,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:09,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:25:09,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:09,643 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-28 23:25:09,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:09,796 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2021-10-28 23:25:09,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:25:09,796 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-28 23:25:09,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:09,797 INFO L225 Difference]: With dead ends: 131 [2021-10-28 23:25:09,797 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 23:25:09,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 23:25:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-10-28 23:25:09,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.201834862385321) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-10-28 23:25:09,812 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 29 [2021-10-28 23:25:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:09,812 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-10-28 23:25:09,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-10-28 23:25:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-10-28 23:25:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:25:09,814 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:09,814 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:09,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:10,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:10,029 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash -855526903, now seen corresponding path program 1 times [2021-10-28 23:25:10,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:10,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210962117] [2021-10-28 23:25:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:10,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:10,042 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:10,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299271860] [2021-10-28 23:25:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:10,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:10,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:10,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:25:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:10,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:25:10,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:10,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:10,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210962117] [2021-10-28 23:25:10,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:10,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299271860] [2021-10-28 23:25:10,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299271860] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:10,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:10,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:10,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539991848] [2021-10-28 23:25:10,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:10,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:10,902 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2021-10-28 23:25:11,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:11,144 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2021-10-28 23:25:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:25:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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 [2021-10-28 23:25:11,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:11,145 INFO L225 Difference]: With dead ends: 142 [2021-10-28 23:25:11,146 INFO L226 Difference]: Without dead ends: 140 [2021-10-28 23:25:11,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-28 23:25:11,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2021-10-28 23:25:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 113 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-10-28 23:25:11,159 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 31 [2021-10-28 23:25:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:11,160 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-10-28 23:25:11,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2021-10-28 23:25:11,160 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-10-28 23:25:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 23:25:11,161 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:11,161 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:11,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:11,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:25:11,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash 155590347, now seen corresponding path program 2 times [2021-10-28 23:25:11,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:11,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722247240] [2021-10-28 23:25:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:11,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:11,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:11,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675987565] [2021-10-28 23:25:11,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:11,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:11,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:11,402 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:11,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:25:11,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:11,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:11,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 23:25:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:12,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:12,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722247240] [2021-10-28 23:25:12,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:12,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675987565] [2021-10-28 23:25:12,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675987565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:12,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:12,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:12,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958648500] [2021-10-28 23:25:12,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:12,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:12,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:12,260 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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) [2021-10-28 23:25:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:12,613 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2021-10-28 23:25:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 [2021-10-28 23:25:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:12,616 INFO L225 Difference]: With dead ends: 148 [2021-10-28 23:25:12,616 INFO L226 Difference]: Without dead ends: 146 [2021-10-28 23:25:12,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:25:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-28 23:25:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 118. [2021-10-28 23:25:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2021-10-28 23:25:12,630 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 31 [2021-10-28 23:25:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:12,632 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2021-10-28 23:25:12,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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) [2021-10-28 23:25:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2021-10-28 23:25:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 23:25:12,635 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:12,635 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:12,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:12,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 23:25:12,852 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1663177194, now seen corresponding path program 2 times [2021-10-28 23:25:12,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:12,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613357672] [2021-10-28 23:25:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:12,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:12,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:12,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794054678] [2021-10-28 23:25:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:12,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:12,865 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:12,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:25:13,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:13,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:13,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 23:25:13,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:13,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:13,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613357672] [2021-10-28 23:25:13,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:13,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794054678] [2021-10-28 23:25:13,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794054678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:13,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:13,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-28 23:25:13,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386044859] [2021-10-28 23:25:13,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:25:13,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:25:13,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:25:13,620 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:13,800 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2021-10-28 23:25:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 23:25:13,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-10-28 23:25:13,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:13,802 INFO L225 Difference]: With dead ends: 160 [2021-10-28 23:25:13,802 INFO L226 Difference]: Without dead ends: 148 [2021-10-28 23:25:13,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-28 23:25:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 126. [2021-10-28 23:25:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 125 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2021-10-28 23:25:13,817 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 33 [2021-10-28 23:25:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:13,818 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2021-10-28 23:25:13,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2021-10-28 23:25:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 23:25:13,819 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:13,819 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:13,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:14,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:25:14,036 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:14,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1610721748, now seen corresponding path program 1 times [2021-10-28 23:25:14,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:14,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499128638] [2021-10-28 23:25:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:14,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:14,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:14,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986621631] [2021-10-28 23:25:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:14,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:14,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:14,055 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:14,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:25:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 23:25:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:15,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:15,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499128638] [2021-10-28 23:25:15,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:15,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986621631] [2021-10-28 23:25:15,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986621631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:15,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:15,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:25:15,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273837749] [2021-10-28 23:25:15,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:25:15,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:25:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:15,086 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:15,512 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2021-10-28 23:25:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:25:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-10-28 23:25:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:15,514 INFO L225 Difference]: With dead ends: 162 [2021-10-28 23:25:15,514 INFO L226 Difference]: Without dead ends: 148 [2021-10-28 23:25:15,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:25:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-28 23:25:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-10-28 23:25:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 118 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2021-10-28 23:25:15,529 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 33 [2021-10-28 23:25:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:15,529 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2021-10-28 23:25:15,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2021-10-28 23:25:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:25:15,531 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:15,531 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:15,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:15,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:15,752 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash 130855945, now seen corresponding path program 3 times [2021-10-28 23:25:15,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:15,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132259641] [2021-10-28 23:25:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:15,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:15,762 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:15,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605461879] [2021-10-28 23:25:15,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:15,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:15,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:15,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:25:16,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:25:16,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:16,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 23:25:16,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:25:17,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:17,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132259641] [2021-10-28 23:25:17,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:17,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605461879] [2021-10-28 23:25:17,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605461879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:17,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:17,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-28 23:25:17,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213078161] [2021-10-28 23:25:17,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 23:25:17,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:25:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:17,047 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-10-28 23:25:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:18,963 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2021-10-28 23:25:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:18,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 37 [2021-10-28 23:25:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:18,965 INFO L225 Difference]: With dead ends: 172 [2021-10-28 23:25:18,965 INFO L226 Difference]: Without dead ends: 162 [2021-10-28 23:25:18,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:25:18,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-28 23:25:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2021-10-28 23:25:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2021-10-28 23:25:18,987 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 37 [2021-10-28 23:25:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:18,988 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2021-10-28 23:25:18,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-10-28 23:25:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2021-10-28 23:25:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:25:18,989 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:18,989 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:19,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:19,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:19,215 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:19,215 INFO L85 PathProgramCache]: Analyzing trace with hash -127249911, now seen corresponding path program 4 times [2021-10-28 23:25:19,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:19,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799091886] [2021-10-28 23:25:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:19,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:19,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:19,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164161607] [2021-10-28 23:25:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:19,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:19,247 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:19,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:25:19,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:19,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:25:19,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:20,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:20,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799091886] [2021-10-28 23:25:20,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:20,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164161607] [2021-10-28 23:25:20,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164161607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:20,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:20,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:20,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206867749] [2021-10-28 23:25:20,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:20,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:20,173 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:20,560 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2021-10-28 23:25:20,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:20,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-28 23:25:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:20,561 INFO L225 Difference]: With dead ends: 162 [2021-10-28 23:25:20,561 INFO L226 Difference]: Without dead ends: 158 [2021-10-28 23:25:20,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-28 23:25:20,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 142. [2021-10-28 23:25:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 141 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2021-10-28 23:25:20,595 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 37 [2021-10-28 23:25:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:20,595 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2021-10-28 23:25:20,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2021-10-28 23:25:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:25:20,595 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:20,596 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:20,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-28 23:25:20,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:25:20,796 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:20,797 INFO L85 PathProgramCache]: Analyzing trace with hash -127309493, now seen corresponding path program 5 times [2021-10-28 23:25:20,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:20,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050872121] [2021-10-28 23:25:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:20,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:20,810 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:20,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766765134] [2021-10-28 23:25:20,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:25:20,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:20,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:20,812 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:20,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:25:22,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 23:25:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:22,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:25:22,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:22,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:22,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050872121] [2021-10-28 23:25:22,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:22,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766765134] [2021-10-28 23:25:22,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766765134] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:22,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:22,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:22,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064480879] [2021-10-28 23:25:22,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:22,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:22,565 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:22,800 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2021-10-28 23:25:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-28 23:25:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:22,802 INFO L225 Difference]: With dead ends: 162 [2021-10-28 23:25:22,802 INFO L226 Difference]: Without dead ends: 152 [2021-10-28 23:25:22,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-28 23:25:22,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 142. [2021-10-28 23:25:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1824817518248176) internal successors, (162), 141 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2021-10-28 23:25:22,825 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 37 [2021-10-28 23:25:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:22,825 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2021-10-28 23:25:22,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2021-10-28 23:25:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:25:22,827 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:22,827 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:22,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:23,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:25:23,038 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:23,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash 948563977, now seen corresponding path program 6 times [2021-10-28 23:25:23,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:23,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147931545] [2021-10-28 23:25:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:23,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:23,048 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:23,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608662176] [2021-10-28 23:25:23,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:25:23,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:23,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:23,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:23,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:25:23,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-28 23:25:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:25:23,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:23,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:23,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147931545] [2021-10-28 23:25:23,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:23,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608662176] [2021-10-28 23:25:23,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608662176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:23,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:23,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:23,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522634357] [2021-10-28 23:25:23,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:23,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:23,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:23,919 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:24,154 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2021-10-28 23:25:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-28 23:25:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:24,156 INFO L225 Difference]: With dead ends: 170 [2021-10-28 23:25:24,156 INFO L226 Difference]: Without dead ends: 166 [2021-10-28 23:25:24,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-28 23:25:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 146. [2021-10-28 23:25:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 145 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2021-10-28 23:25:24,180 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 37 [2021-10-28 23:25:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:24,180 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2021-10-28 23:25:24,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2021-10-28 23:25:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:25:24,181 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:24,182 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:24,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:24,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:24,391 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:24,391 INFO L85 PathProgramCache]: Analyzing trace with hash 948504395, now seen corresponding path program 7 times [2021-10-28 23:25:24,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:24,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142667802] [2021-10-28 23:25:24,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:24,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:24,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:24,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360619590] [2021-10-28 23:25:24,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:25:24,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:24,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:24,403 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:24,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:25:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:24,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:25:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:25,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:25,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142667802] [2021-10-28 23:25:25,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:25,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360619590] [2021-10-28 23:25:25,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360619590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:25,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:25,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:25,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061951077] [2021-10-28 23:25:25,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:25,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:25,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:25,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:25,266 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:25,515 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2021-10-28 23:25:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:25,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-28 23:25:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:25,517 INFO L225 Difference]: With dead ends: 166 [2021-10-28 23:25:25,517 INFO L226 Difference]: Without dead ends: 156 [2021-10-28 23:25:25,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-28 23:25:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2021-10-28 23:25:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 137 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2021-10-28 23:25:25,533 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 37 [2021-10-28 23:25:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:25,534 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2021-10-28 23:25:25,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:25,534 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2021-10-28 23:25:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 23:25:25,535 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:25,535 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:25,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:25,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:25,742 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:25,742 INFO L85 PathProgramCache]: Analyzing trace with hash 690398539, now seen corresponding path program 8 times [2021-10-28 23:25:25,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:25,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598703766] [2021-10-28 23:25:25,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:25,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:25,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:25,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671736524] [2021-10-28 23:25:25,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:25,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:25,755 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:25,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 23:25:26,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:26,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 23:25:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:26,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:26,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598703766] [2021-10-28 23:25:26,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:26,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671736524] [2021-10-28 23:25:26,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671736524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:26,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:26,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:26,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905259387] [2021-10-28 23:25:26,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:26,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:26,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:26,738 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:26,987 INFO L93 Difference]: Finished difference Result 166 states and 188 transitions. [2021-10-28 23:25:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:26,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-28 23:25:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:26,989 INFO L225 Difference]: With dead ends: 166 [2021-10-28 23:25:26,989 INFO L226 Difference]: Without dead ends: 162 [2021-10-28 23:25:26,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-28 23:25:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2021-10-28 23:25:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 141 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2021-10-28 23:25:27,017 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 37 [2021-10-28 23:25:27,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:27,017 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2021-10-28 23:25:27,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2021-10-28 23:25:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:25:27,018 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:27,018 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:27,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:27,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:27,247 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1198667980, now seen corresponding path program 2 times [2021-10-28 23:25:27,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:27,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760953808] [2021-10-28 23:25:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:27,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:27,260 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:27,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18507495] [2021-10-28 23:25:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:27,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:27,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:27,275 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:27,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 23:25:27,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:27,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:25:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:28,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:28,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760953808] [2021-10-28 23:25:28,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:28,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18507495] [2021-10-28 23:25:28,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18507495] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:28,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:28,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:25:28,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698031357] [2021-10-28 23:25:28,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:25:28,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:25:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:28,599 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:29,350 INFO L93 Difference]: Finished difference Result 177 states and 200 transitions. [2021-10-28 23:25:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:25:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-28 23:25:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:29,354 INFO L225 Difference]: With dead ends: 177 [2021-10-28 23:25:29,354 INFO L226 Difference]: Without dead ends: 175 [2021-10-28 23:25:29,355 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-28 23:25:29,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 146. [2021-10-28 23:25:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 145 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2021-10-28 23:25:29,382 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 39 [2021-10-28 23:25:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:29,383 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2021-10-28 23:25:29,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2021-10-28 23:25:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 23:25:29,384 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:29,384 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:29,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:29,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 23:25:29,599 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:29,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2085182066, now seen corresponding path program 3 times [2021-10-28 23:25:29,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:29,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832131819] [2021-10-28 23:25:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:29,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:29,617 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:29,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179341567] [2021-10-28 23:25:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:29,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:29,618 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:29,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 23:25:30,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 23:25:30,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 23:25:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-28 23:25:30,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:30,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832131819] [2021-10-28 23:25:30,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:30,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179341567] [2021-10-28 23:25:30,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179341567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:30,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:30,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-28 23:25:30,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474912231] [2021-10-28 23:25:30,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:25:30,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:25:30,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:25:30,762 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:31,704 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2021-10-28 23:25:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-28 23:25:31,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:31,705 INFO L225 Difference]: With dead ends: 146 [2021-10-28 23:25:31,705 INFO L226 Difference]: Without dead ends: 132 [2021-10-28 23:25:31,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-28 23:25:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 91. [2021-10-28 23:25:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 90 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-10-28 23:25:31,721 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 39 [2021-10-28 23:25:31,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:31,721 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-10-28 23:25:31,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:31,721 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-10-28 23:25:31,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:31,722 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:31,722 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:31,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:31,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:31,922 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:31,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1388479860, now seen corresponding path program 9 times [2021-10-28 23:25:31,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:31,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570916751] [2021-10-28 23:25:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:31,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:31,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:31,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644229927] [2021-10-28 23:25:31,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:31,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:31,946 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:31,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:25:32,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:25:32,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:32,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:32,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 23:25:33,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:33,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570916751] [2021-10-28 23:25:33,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:33,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644229927] [2021-10-28 23:25:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644229927] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:33,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:33,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-28 23:25:33,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284011808] [2021-10-28 23:25:33,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:25:33,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:33,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:25:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:25:33,059 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:34,206 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2021-10-28 23:25:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:25:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-10-28 23:25:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:34,207 INFO L225 Difference]: With dead ends: 134 [2021-10-28 23:25:34,207 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 23:25:34,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:25:34,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 23:25:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2021-10-28 23:25:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-10-28 23:25:34,228 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 45 [2021-10-28 23:25:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:34,228 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-10-28 23:25:34,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-10-28 23:25:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:34,229 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:34,230 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:34,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:34,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:34,455 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1388539442, now seen corresponding path program 10 times [2021-10-28 23:25:34,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:34,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143969072] [2021-10-28 23:25:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:34,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:34,472 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:34,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461698812] [2021-10-28 23:25:34,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:25:34,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:34,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:34,473 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:34,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 23:25:35,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:25:35,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:35,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:35,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143969072] [2021-10-28 23:25:35,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:35,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461698812] [2021-10-28 23:25:35,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461698812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:35,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:35,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:35,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49428993] [2021-10-28 23:25:35,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:35,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:35,572 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:35,873 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2021-10-28 23:25:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:25:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-10-28 23:25:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:35,875 INFO L225 Difference]: With dead ends: 133 [2021-10-28 23:25:35,875 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 23:25:35,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:35,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 23:25:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2021-10-28 23:25:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 106 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-10-28 23:25:35,905 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 45 [2021-10-28 23:25:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:35,906 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-10-28 23:25:35,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-10-28 23:25:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:35,907 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:35,907 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:35,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:36,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 23:25:36,126 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash -312665972, now seen corresponding path program 11 times [2021-10-28 23:25:36,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:36,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593099700] [2021-10-28 23:25:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:36,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:36,149 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:36,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128168668] [2021-10-28 23:25:36,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:25:36,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:36,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:36,152 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:36,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 23:25:37,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-28 23:25:37,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:37,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:37,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593099700] [2021-10-28 23:25:37,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:37,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128168668] [2021-10-28 23:25:37,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128168668] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:37,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:37,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:37,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126736119] [2021-10-28 23:25:37,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:37,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:37,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:37,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:37,800 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:38,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:38,141 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-10-28 23:25:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:25:38,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-10-28 23:25:38,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:38,143 INFO L225 Difference]: With dead ends: 141 [2021-10-28 23:25:38,143 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 23:25:38,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:38,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 23:25:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-10-28 23:25:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-10-28 23:25:38,173 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 45 [2021-10-28 23:25:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:38,173 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-10-28 23:25:38,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-10-28 23:25:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:38,174 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:38,174 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:38,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:38,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 23:25:38,385 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:38,386 INFO L85 PathProgramCache]: Analyzing trace with hash -312725554, now seen corresponding path program 12 times [2021-10-28 23:25:38,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:38,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480088198] [2021-10-28 23:25:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:38,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:38,413 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:38,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129206431] [2021-10-28 23:25:38,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:25:38,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:38,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:38,421 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:38,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 23:25:39,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 23:25:39,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:39,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:39,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:39,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480088198] [2021-10-28 23:25:39,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:39,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129206431] [2021-10-28 23:25:39,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129206431] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:39,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:39,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:39,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270314781] [2021-10-28 23:25:39,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:39,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:39,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:39,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:39,668 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:40,010 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-10-28 23:25:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:25:40,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-10-28 23:25:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:40,012 INFO L225 Difference]: With dead ends: 141 [2021-10-28 23:25:40,012 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 23:25:40,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 23:25:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-10-28 23:25:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-10-28 23:25:40,041 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 45 [2021-10-28 23:25:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:40,041 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-10-28 23:25:40,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-10-28 23:25:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:40,043 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:40,043 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:40,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:40,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 23:25:40,247 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:40,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash -570831410, now seen corresponding path program 13 times [2021-10-28 23:25:40,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:40,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884225295] [2021-10-28 23:25:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:40,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:40,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:40,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484188825] [2021-10-28 23:25:40,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:25:40,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:40,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:40,262 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:40,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 23:25:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:25:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:41,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:41,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884225295] [2021-10-28 23:25:41,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:41,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484188825] [2021-10-28 23:25:41,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484188825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:41,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:41,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:41,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815643571] [2021-10-28 23:25:41,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:41,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:41,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:41,708 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:42,043 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-10-28 23:25:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:25:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-10-28 23:25:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:42,044 INFO L225 Difference]: With dead ends: 141 [2021-10-28 23:25:42,044 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 23:25:42,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 23:25:42,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-10-28 23:25:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-10-28 23:25:42,071 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 45 [2021-10-28 23:25:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:42,071 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-10-28 23:25:42,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-10-28 23:25:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:42,072 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:42,072 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:42,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-28 23:25:42,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 23:25:42,283 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:42,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:42,283 INFO L85 PathProgramCache]: Analyzing trace with hash -570890992, now seen corresponding path program 14 times [2021-10-28 23:25:42,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:42,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590591844] [2021-10-28 23:25:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:42,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:42,294 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:42,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444710237] [2021-10-28 23:25:42,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:25:42,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:42,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:42,298 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:42,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:25:43,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:25:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:43,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-28 23:25:43,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:25:43,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:43,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590591844] [2021-10-28 23:25:43,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:43,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444710237] [2021-10-28 23:25:43,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444710237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:43,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:43,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-28 23:25:43,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607132381] [2021-10-28 23:25:43,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:25:43,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:25:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:25:43,542 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:43,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:43,741 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2021-10-28 23:25:43,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:25:43,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-10-28 23:25:43,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:43,742 INFO L225 Difference]: With dead ends: 141 [2021-10-28 23:25:43,742 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 23:25:43,742 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:25:43,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 23:25:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 115. [2021-10-28 23:25:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-10-28 23:25:43,778 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 45 [2021-10-28 23:25:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-10-28 23:25:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:25:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-10-28 23:25:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 23:25:43,780 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:25:43,780 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:25:43,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:43,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 23:25:43,995 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-28 23:25:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:25:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash -620841332, now seen corresponding path program 15 times [2021-10-28 23:25:43,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:25:43,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174861994] [2021-10-28 23:25:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:25:43,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:25:44,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-28 23:25:44,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011486412] [2021-10-28 23:25:44,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:25:44,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:44,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:25:44,013 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:25:44,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 23:25:44,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 23:25:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:25:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 23:25:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:25:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 23:25:45,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:25:45,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174861994] [2021-10-28 23:25:45,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-28 23:25:45,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011486412] [2021-10-28 23:25:45,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011486412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:25:45,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-28 23:25:45,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-28 23:25:45,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453421545] [2021-10-28 23:25:45,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:25:45,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:25:45,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:25:45,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:25:45,347 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-10-28 23:25:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:25:57,152 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-10-28 23:25:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:25:57,153 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 45 [2021-10-28 23:25:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:25:57,153 INFO L225 Difference]: With dead ends: 115 [2021-10-28 23:25:57,153 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 23:25:57,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:25:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 23:25:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 23:25:57,154 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) [2021-10-28 23:25:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 23:25:57,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-10-28 23:25:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:25:57,155 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:25:57,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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) [2021-10-28 23:25:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:25:57,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 23:25:57,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:25:57,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:25:57,157 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:25:57,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:25:57,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:25:57,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:25:57,158 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:25:57,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 23:25:57,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:25:57,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 23:25:57,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:25:57,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:25:57,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:25:57,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:25:58,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:25:58,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:25:58,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:25:58,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:25:58,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 23:26:20,629 WARN L207 SmtUtils]: Spent 9.54 s on a formula simplification. DAG size of input: 185 DAG size of output: 44 [2021-10-28 23:26:30,235 WARN L207 SmtUtils]: Spent 9.60 s on a formula simplification. DAG size of input: 210 DAG size of output: 33 [2021-10-28 23:26:30,238 INFO L857 garLoopResultBuilder]: For program point L35-2(lines 35 52) no Hoare annotation was computed. [2021-10-28 23:26:30,238 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-28 23:26:30,238 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-10-28 23:26:30,238 INFO L853 garLoopResultBuilder]: At program point L11-2(lines 10 16) the Hoare annotation is: (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 20) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 20) (<= 1 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~a~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) [2021-10-28 23:26:30,238 INFO L857 garLoopResultBuilder]: For program point L11-3(lines 11 14) no Hoare annotation was computed. [2021-10-28 23:26:30,238 INFO L853 garLoopResultBuilder]: At program point L11-5(lines 10 16) the Hoare annotation is: (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 20) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 20) (<= 1 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~a~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) [2021-10-28 23:26:30,238 INFO L857 garLoopResultBuilder]: For program point L11-6(lines 11 14) no Hoare annotation was computed. [2021-10-28 23:26:30,239 INFO L853 garLoopResultBuilder]: At program point L11-8(lines 40 41) the Hoare annotation is: (let ((.cse0 (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) (.cse1 (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0))) (and (= (+ ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0) (+ .cse0 (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0) .cse1)) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 20) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 20) (<= 1 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~a~0 (+ .cse0 .cse1)))) [2021-10-28 23:26:30,239 INFO L857 garLoopResultBuilder]: For program point L11-9(lines 11 14) no Hoare annotation was computed. [2021-10-28 23:26:30,239 INFO L853 garLoopResultBuilder]: At program point L11-11(lines 10 16) the Hoare annotation is: (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) (= ULTIMATE.start_assume_abort_if_not_~cond 1) (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~x~0 20) (<= 1 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 20) (<= 1 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~b~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) [2021-10-28 23:26:30,239 INFO L857 garLoopResultBuilder]: For program point L11-12(lines 11 14) no Hoare annotation was computed. [2021-10-28 23:26:30,240 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-28 23:26:30,240 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 23:26:30,240 INFO L853 garLoopResultBuilder]: At program point L11-14(lines 10 16) the Hoare annotation is: (let ((.cse7 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0)) (.cse2 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse8 (= ULTIMATE.start_main_~p~0 1)) (.cse3 (<= ULTIMATE.start_main_~x~0 20)) (.cse4 (<= 1 ULTIMATE.start_main_~y~0)) (.cse9 (= ULTIMATE.start_main_~q~0 0)) (.cse5 (<= ULTIMATE.start_main_~y~0 20)) (.cse10 (= ULTIMATE.start_main_~s~0 1)) (.cse6 (<= 1 ULTIMATE.start_main_~x~0)) (.cse11 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0))) (or (let ((.cse0 (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0)) (.cse1 (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0))) (and (= (+ ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0) (+ .cse0 (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0) .cse1)) .cse2 (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse3 .cse4 .cse5 .cse6 .cse7 (= ULTIMATE.start_main_~b~0 (+ .cse0 .cse1)))) (and .cse2 .cse8 .cse3 .cse4 .cse9 .cse5 .cse10 .cse6 .cse7 .cse11) (and .cse2 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~x~0) .cse8 .cse3 .cse4 .cse9 .cse5 (= ULTIMATE.start_main_~r~0 0) .cse10 .cse6 .cse11))) [2021-10-28 23:26:30,240 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 23:26:30,240 INFO L857 garLoopResultBuilder]: For program point L11-15(lines 11 14) no Hoare annotation was computed. [2021-10-28 23:26:30,240 INFO L853 garLoopResultBuilder]: At program point L11-17(lines 10 16) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= ULTIMATE.start_main_~x~0 20)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= ULTIMATE.start_main_~y~0 20)) (.cse4 (<= 1 ULTIMATE.start_main_~x~0))) (or (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) .cse0 .cse1 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0) (= ULTIMATE.start_main_~b~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0)))) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~q~0 0) .cse3 (= ULTIMATE.start_main_~s~0 1) .cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)))) [2021-10-28 23:26:30,240 INFO L857 garLoopResultBuilder]: For program point L11-18(lines 11 14) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L860 garLoopResultBuilder]: At program point L11-20(lines 10 16) the Hoare annotation is: true [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point L12-1(lines 12 13) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point L12-3(lines 12 13) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point L12-4(lines 12 13) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point L12-5(lines 12 13) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point L12-6(lines 12 13) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-28 23:26:30,241 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-28 23:26:30,242 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-28 23:26:30,242 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-10-28 23:26:30,242 INFO L857 garLoopResultBuilder]: For program point L7-1(lines 7 9) no Hoare annotation was computed. [2021-10-28 23:26:30,242 INFO L857 garLoopResultBuilder]: For program point L7-2(lines 7 9) no Hoare annotation was computed. [2021-10-28 23:26:30,242 INFO L857 garLoopResultBuilder]: For program point L7-3(lines 7 9) no Hoare annotation was computed. [2021-10-28 23:26:30,242 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L857 garLoopResultBuilder]: For program point L8-2(line 8) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L857 garLoopResultBuilder]: For program point L8-4(line 8) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L857 garLoopResultBuilder]: For program point L8-6(line 8) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L860 garLoopResultBuilder]: At program point L58(lines 18 59) the Hoare annotation is: true [2021-10-28 23:26:30,243 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L857 garLoopResultBuilder]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-10-28 23:26:30,243 INFO L853 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse1 (<= ULTIMATE.start_main_~x~0 20)) (.cse2 (<= 1 ULTIMATE.start_main_~y~0)) (.cse3 (<= ULTIMATE.start_main_~y~0 20)) (.cse4 (<= 1 ULTIMATE.start_main_~x~0)) (.cse5 (= ULTIMATE.start_main_~a~0 (+ (* ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~x~0))))) (or (and (= (+ (* ULTIMATE.start_main_~s~0 ULTIMATE.start_main_~y~0) (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~x~0)) ULTIMATE.start_main_~b~0) .cse0 (= (+ (* ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~r~0) 1) (* ULTIMATE.start_main_~p~0 ULTIMATE.start_main_~s~0)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse0 (= ULTIMATE.start_main_~p~0 1) .cse1 .cse2 (= ULTIMATE.start_main_~q~0 0) .cse3 (= ULTIMATE.start_main_~r~0 0) (= ULTIMATE.start_main_~s~0 1) .cse4 .cse5 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)))) [2021-10-28 23:26:30,246 INFO L731 BasicCegarLoop]: Path program histogram: [15, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:26:30,248 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:26:30,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:26:30 BoogieIcfgContainer [2021-10-28 23:26:30,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:26:30,273 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:26:30,273 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:26:30,273 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:26:30,274 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:25:01" (3/4) ... [2021-10-28 23:26:30,277 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 23:26:30,291 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-10-28 23:26:30,291 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 23:26:30,292 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:26:30,292 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 23:26:30,343 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:26:30,343 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:26:30,344 INFO L168 Benchmark]: Toolchain (without parser) took 89994.40 ms. Allocated memory was 104.9 MB in the beginning and 268.4 MB in the end (delta: 163.6 MB). Free memory was 63.2 MB in the beginning and 199.7 MB in the end (delta: -136.5 MB). Peak memory consumption was 28.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:30,345 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 104.9 MB. Free memory is still 79.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:26:30,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.54 ms. Allocated memory is still 104.9 MB. Free memory was 63.0 MB in the beginning and 80.2 MB in the end (delta: -17.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:30,346 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.75 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 78.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:30,346 INFO L168 Benchmark]: Boogie Preprocessor took 61.51 ms. Allocated memory is still 104.9 MB. Free memory was 78.4 MB in the beginning and 77.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:30,347 INFO L168 Benchmark]: RCFGBuilder took 514.39 ms. Allocated memory is still 104.9 MB. Free memory was 77.2 MB in the beginning and 65.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:30,347 INFO L168 Benchmark]: TraceAbstraction took 88879.07 ms. Allocated memory was 104.9 MB in the beginning and 268.4 MB in the end (delta: 163.6 MB). Free memory was 65.6 MB in the beginning and 202.8 MB in the end (delta: -137.2 MB). Peak memory consumption was 218.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:30,348 INFO L168 Benchmark]: Witness Printer took 70.55 ms. Allocated memory is still 268.4 MB. Free memory was 202.8 MB in the beginning and 199.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:26:30,350 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 104.9 MB. Free memory is still 79.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 381.54 ms. Allocated memory is still 104.9 MB. Free memory was 63.0 MB in the beginning and 80.2 MB in the end (delta: -17.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.75 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 78.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.51 ms. Allocated memory is still 104.9 MB. Free memory was 78.4 MB in the beginning and 77.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 514.39 ms. Allocated memory is still 104.9 MB. Free memory was 77.2 MB in the beginning and 65.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 88879.07 ms. Allocated memory was 104.9 MB in the beginning and 268.4 MB in the end (delta: 163.6 MB). Free memory was 65.6 MB in the beginning and 202.8 MB in the end (delta: -137.2 MB). Peak memory consumption was 218.2 MB. Max. memory is 16.1 GB. * Witness Printer took 70.55 ms. Allocated memory is still 268.4 MB. Free memory was 202.8 MB in the beginning and 199.7 MB in the end (delta: 3.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 88.7s, OverallIterations: 30, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 22.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 32.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1027 SDtfs, 1263 SDslu, 3187 SDs, 0 SdLazy, 4174 SolverSat, 361 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 18.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1043 GetRequests, 776 SyntacticMatches, 2 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=19, InterpolantAutomatonStates: 264, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 30 MinimizatonAttempts, 493 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 98 NumberOfFragments, 470 HoareAnnotationTreeSize, 9 FomulaSimplifications, 943069 FormulaSimplificationTreeSizeReduction, 1.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 315098 FormulaSimplificationTreeSizeReductionInter, 31.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 970 NumberOfCodeBlocks, 908 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 940 ConstructedInterpolants, 2 QuantifiedInterpolants, 10972 SizeOfPredicates, 235 NumberOfNonLiveVariables, 3661 ConjunctsInSsa, 720 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 129/752 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 7 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: (((((((s * y + q * x == b && cond == 1) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && b == a) && b == r * y + p * x) || (((((((cond == 1 && x <= 20) && 1 <= y) && q == 0) && y <= 20) && s == 1) && 1 <= x) && b == y) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: (((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && a == r * y + p * x - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && a == r * y + p * x) || ((((((((((cond == 1 && p == 1) && x <= 20) && 1 <= y) && q == 0) && y <= 20) && r == 0) && s == 1) && 1 <= x) && a == r * y + p * x) && b == y) - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((((b + a == r * y + s * y + q * x + p * x && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && a == r * y + p * x - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && b == a) && b == r * y + p * x - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((b + a == r * y + s * y + q * x + p * x && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && b == a) && b == r * y + p * x) || (((((((((cond == 1 && p == 1) && x <= 20) && 1 <= y) && q == 0) && y <= 20) && s == 1) && 1 <= x) && b == a) && b == y)) || ((((((((((cond == 1 && a == x) && p == 1) && x <= 20) && 1 <= y) && q == 0) && y <= 20) && r == 0) && s == 1) && 1 <= x) && b == y) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: (((((((s * y + q * x == b && cond == 1) && q * r + 1 == p * s) && 1 == cond) && x <= 20) && 1 <= y) && y <= 20) && 1 <= x) && a == r * y + p * x RESULT: Ultimate proved your program to be correct! [2021-10-28 23:26:30,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47368507-57cf-4cfd-98e4-1f8b7c0d15f1/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...