./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU --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 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:42:33,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:42:33,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:42:33,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:42:33,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:42:33,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:42:33,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:42:33,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:42:33,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:42:33,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:42:33,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:42:33,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:42:33,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:42:33,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:42:33,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:42:33,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:42:33,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:42:33,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:42:33,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:42:33,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:42:33,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:42:33,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:42:33,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:42:33,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:42:33,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:42:33,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:42:33,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:42:33,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:42:33,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:42:33,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:42:33,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:42:33,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:42:33,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:42:33,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:42:33,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:42:33,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:42:33,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:42:33,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:42:33,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:42:33,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:42:33,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:42:33,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:42:33,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:42:33,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:42:33,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:42:33,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:42:33,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:42:33,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:42:33,350 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:42:33,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:42:33,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:42:33,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:42:33,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:42:33,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:42:33,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:42:33,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:42:33,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:42:33,353 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:42:33,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:42:33,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:42:33,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:42:33,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:42:33,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:42:33,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:42:33,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:42:33,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:42:33,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:42:33,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:42:33,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:42:33,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:42:33,357 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:42:33,359 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:42:33,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:42:33,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:42:33,360 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_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99e5cccea54789cc7c8b01ece41ae38ca7afc8c38f73e2884988b8ff4c6bfc25 [2021-11-02 22:42:33,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:42:33,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:42:33,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:42:33,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:42:33,686 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:42:33,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-11-02 22:42:33,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/data/304edd965/710611ee9bcc4ce1ba5e9500f79f16b7/FLAG01abe191a [2021-11-02 22:42:34,232 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:42:34,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c [2021-11-02 22:42:34,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/data/304edd965/710611ee9bcc4ce1ba5e9500f79f16b7/FLAG01abe191a [2021-11-02 22:42:34,599 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/data/304edd965/710611ee9bcc4ce1ba5e9500f79f16b7 [2021-11-02 22:42:34,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:42:34,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:42:34,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:42:34,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:42:34,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:42:34,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:34,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc06907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34, skipping insertion in model container [2021-11-02 22:42:34,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:34,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:42:34,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:42:34,831 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_f8256824-5cc2-46f3-8cbe-841d7333afb7/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-11-02 22:42:34,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:42:34,860 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:42:34,882 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_f8256824-5cc2-46f3-8cbe-841d7333afb7/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound20.c[458,471] [2021-11-02 22:42:34,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:42:34,921 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:42:34,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34 WrapperNode [2021-11-02 22:42:34,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:42:34,925 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:42:34,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:42:34,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:42:34,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:34,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:34,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:42:34,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:42:34,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:42:34,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:42:34,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:34,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:34,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:34,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:34,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:35,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:35,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:35,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:42:35,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:42:35,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:42:35,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:42:35,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (1/1) ... [2021-11-02 22:42:35,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:42:35,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:35,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:42:35,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:42:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:42:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:42:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:42:35,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:42:35,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:42:35,365 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-02 22:42:35,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:42:35 BoogieIcfgContainer [2021-11-02 22:42:35,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:42:35,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:42:35,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:42:35,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:42:35,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:42:34" (1/3) ... [2021-11-02 22:42:35,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3141716e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:42:35, skipping insertion in model container [2021-11-02 22:42:35,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:42:34" (2/3) ... [2021-11-02 22:42:35,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3141716e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:42:35, skipping insertion in model container [2021-11-02 22:42:35,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:42:35" (3/3) ... [2021-11-02 22:42:35,377 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound20.c [2021-11-02 22:42:35,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:42:35,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-02 22:42:35,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:42:35,472 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 [2021-11-02 22:42:35,472 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 22:42:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 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) [2021-11-02 22:42:35,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-02 22:42:35,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:35,506 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-02 22:42:35,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:35,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-11-02 22:42:35,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:35,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934186578] [2021-11-02 22:42:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:35,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:35,643 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:35,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539441408] [2021-11-02 22:42:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:35,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:35,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:35,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:35,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:42:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:42:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:35,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:35,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934186578] [2021-11-02 22:42:35,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:35,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539441408] [2021-11-02 22:42:35,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539441408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:35,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:35,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:42:35,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264381697] [2021-11-02 22:42:35,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:42:35,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:35,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:42:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:42:35,958 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 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) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:36,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:36,028 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-02 22:42:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:42:36,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-11-02 22:42:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:36,037 INFO L225 Difference]: With dead ends: 54 [2021-11-02 22:42:36,038 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 22:42:36,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:42:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 22:42:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-11-02 22:42:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 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) [2021-11-02 22:42:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-02 22:42:36,073 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2021-11-02 22:42:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:36,074 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-02 22:42:36,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-02 22:42:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:42:36,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:36,075 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:36,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:36,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-02 22:42:36,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash 855725686, now seen corresponding path program 1 times [2021-11-02 22:42:36,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:36,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421242355] [2021-11-02 22:42:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:36,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:36,323 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:36,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403251803] [2021-11-02 22:42:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:36,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:36,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:36,325 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:36,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:42:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:42:36,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:36,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:36,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421242355] [2021-11-02 22:42:36,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:36,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403251803] [2021-11-02 22:42:36,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403251803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:36,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:36,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:42:36,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165289180] [2021-11-02 22:42:36,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:42:36,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:36,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:42:36,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:42:36,503 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:36,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:36,570 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-11-02 22:42:36,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:42:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-02 22:42:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:36,572 INFO L225 Difference]: With dead ends: 37 [2021-11-02 22:42:36,572 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 22:42:36,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:42:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 22:42:36,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-02 22:42:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 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) [2021-11-02 22:42:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-02 22:42:36,579 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2021-11-02 22:42:36,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:36,579 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-02 22:42:36,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-02 22:42:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:42:36,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:36,580 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:36,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:36,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-02 22:42:36,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2021-11-02 22:42:36,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:36,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452821088] [2021-11-02 22:42:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:36,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:36,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:36,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746811095] [2021-11-02 22:42:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:36,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:36,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:36,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:36,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:42:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:42:36,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:36,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:36,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452821088] [2021-11-02 22:42:36,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:36,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746811095] [2021-11-02 22:42:36,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746811095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:37,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:37,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-11-02 22:42:37,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091804506] [2021-11-02 22:42:37,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:42:37,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:37,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:42:37,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:42:37,002 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:37,044 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-02 22:42:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:42:37,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 22:42:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:37,046 INFO L225 Difference]: With dead ends: 30 [2021-11-02 22:42:37,046 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 22:42:37,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:42:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 22:42:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-02 22:42:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-02 22:42:37,057 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2021-11-02 22:42:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:37,057 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-02 22:42:37,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-02 22:42:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 22:42:37,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:37,059 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:37,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:37,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:37,259 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:37,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2021-11-02 22:42:37,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:37,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143934397] [2021-11-02 22:42:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:37,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:37,274 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:37,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327390588] [2021-11-02 22:42:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:37,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:37,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:37,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:42:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:42:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:37,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:37,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143934397] [2021-11-02 22:42:37,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:37,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327390588] [2021-11-02 22:42:37,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327390588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:37,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:37,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:42:37,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023343463] [2021-11-02 22:42:37,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:42:37,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:37,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:42:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:42:37,616 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:37,687 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-02 22:42:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:42:37,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 22:42:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:37,690 INFO L225 Difference]: With dead ends: 28 [2021-11-02 22:42:37,690 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 22:42:37,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:42:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 22:42:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-02 22:42:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 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) [2021-11-02 22:42:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-02 22:42:37,700 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2021-11-02 22:42:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:37,701 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-02 22:42:37,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-02 22:42:37,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:42:37,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:37,704 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-11-02 22:42:37,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:37,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:37,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 2 times [2021-11-02 22:42:37,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:37,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681502714] [2021-11-02 22:42:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:37,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:37,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:37,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787606678] [2021-11-02 22:42:37,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:42:37,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:37,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:37,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:37,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:42:38,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:42:38,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:38,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:42:38,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:38,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:38,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681502714] [2021-11-02 22:42:38,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:38,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787606678] [2021-11-02 22:42:38,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787606678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:38,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:38,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:42:38,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216737012] [2021-11-02 22:42:38,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:42:38,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:42:38,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:42:38,327 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:38,415 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-02 22:42:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:42:38,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-02 22:42:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:38,416 INFO L225 Difference]: With dead ends: 41 [2021-11-02 22:42:38,417 INFO L226 Difference]: Without dead ends: 35 [2021-11-02 22:42:38,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-02 22:42:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-11-02 22:42:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 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) [2021-11-02 22:42:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-02 22:42:38,423 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 14 [2021-11-02 22:42:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:38,423 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-02 22:42:38,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-02 22:42:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:42:38,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:38,424 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:38,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:38,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:38,630 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash 699894435, now seen corresponding path program 2 times [2021-11-02 22:42:38,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:38,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959531535] [2021-11-02 22:42:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:38,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:38,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:38,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653589362] [2021-11-02 22:42:38,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:42:38,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:38,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:38,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:38,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:42:38,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:42:38,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:42:38,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:38,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:38,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959531535] [2021-11-02 22:42:38,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:38,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653589362] [2021-11-02 22:42:38,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653589362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:38,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:38,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:42:38,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965138492] [2021-11-02 22:42:38,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:42:38,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:38,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:42:38,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:42:38,784 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:38,860 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-02 22:42:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:42:38,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 22:42:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:38,861 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:42:38,862 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 22:42:38,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:42:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 22:42:38,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-02 22:42:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:38,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-02 22:42:38,867 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2021-11-02 22:42:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:38,868 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-02 22:42:38,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-02 22:42:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:42:38,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:38,869 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:38,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:39,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:39,080 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1664485700, now seen corresponding path program 2 times [2021-11-02 22:42:39,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:39,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415996572] [2021-11-02 22:42:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:39,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:39,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:39,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185070086] [2021-11-02 22:42:39,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:42:39,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:39,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:39,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:42:39,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:42:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:42:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:39,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:39,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415996572] [2021-11-02 22:42:39,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:39,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185070086] [2021-11-02 22:42:39,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185070086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:39,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:39,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:42:39,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405818551] [2021-11-02 22:42:39,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:42:39,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:42:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:42:39,386 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-11-02 22:42:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:39,447 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-02 22:42:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:42:39,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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 [2021-11-02 22:42:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:39,448 INFO L225 Difference]: With dead ends: 32 [2021-11-02 22:42:39,449 INFO L226 Difference]: Without dead ends: 28 [2021-11-02 22:42:39,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-02 22:42:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-02 22:42:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:39,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-02 22:42:39,454 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2021-11-02 22:42:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:39,454 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-02 22:42:39,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 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) [2021-11-02 22:42:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-02 22:42:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:42:39,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:39,455 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-11-02 22:42:39,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:39,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:39,680 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash -58338866, now seen corresponding path program 3 times [2021-11-02 22:42:39,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:39,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860816275] [2021-11-02 22:42:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:39,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:39,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:39,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651231413] [2021-11-02 22:42:39,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:42:39,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:39,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:39,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:42:39,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:42:39,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:42:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 22:42:39,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:39,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860816275] [2021-11-02 22:42:39,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:39,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651231413] [2021-11-02 22:42:39,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651231413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:39,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:39,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-02 22:42:39,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274379811] [2021-11-02 22:42:39,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:42:39,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:39,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:42:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:42:39,952 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:40,146 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-02 22:42:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:42:40,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 22:42:40,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:40,148 INFO L225 Difference]: With dead ends: 28 [2021-11-02 22:42:40,148 INFO L226 Difference]: Without dead ends: 22 [2021-11-02 22:42:40,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:42:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-02 22:42:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-02 22:42:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 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) [2021-11-02 22:42:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-02 22:42:40,154 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-11-02 22:42:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:40,154 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-02 22:42:40,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-02 22:42:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:42:40,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:40,155 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:40,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:40,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:42:40,360 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1808548489, now seen corresponding path program 3 times [2021-11-02 22:42:40,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:40,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710849936] [2021-11-02 22:42:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:40,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:40,371 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:40,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921898486] [2021-11-02 22:42:40,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:42:40,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:40,373 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:40,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:42:40,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:42:40,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:40,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:42:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:40,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:40,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710849936] [2021-11-02 22:42:40,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:40,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921898486] [2021-11-02 22:42:40,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921898486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:40,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:40,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:42:40,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595996776] [2021-11-02 22:42:40,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:42:40,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:42:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:42:40,568 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:40,611 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-02 22:42:40,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:40,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-02 22:42:40,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:40,615 INFO L225 Difference]: With dead ends: 28 [2021-11-02 22:42:40,615 INFO L226 Difference]: Without dead ends: 24 [2021-11-02 22:42:40,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-02 22:42:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-02 22:42:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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) [2021-11-02 22:42:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-11-02 22:42:40,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2021-11-02 22:42:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:40,630 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-11-02 22:42:40,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-11-02 22:42:40,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:42:40,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:40,631 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:40,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:40,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:40,848 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:40,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:40,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1493484688, now seen corresponding path program 3 times [2021-11-02 22:42:40,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:40,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177099394] [2021-11-02 22:42:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:40,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:40,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:40,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249482927] [2021-11-02 22:42:40,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:42:40,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:40,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:40,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:40,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:42:41,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:42:41,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:41,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:42:41,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:41,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:41,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177099394] [2021-11-02 22:42:41,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:41,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249482927] [2021-11-02 22:42:41,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249482927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:41,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:41,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:42:41,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700096612] [2021-11-02 22:42:41,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:42:41,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:41,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:42:41,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:42:41,267 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:41,360 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-11-02 22:42:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:42:41,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 22:42:41,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:41,362 INFO L225 Difference]: With dead ends: 30 [2021-11-02 22:42:41,363 INFO L226 Difference]: Without dead ends: 26 [2021-11-02 22:42:41,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-02 22:42:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-02 22:42:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-02 22:42:41,376 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-11-02 22:42:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:41,378 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-02 22:42:41,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-02 22:42:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:42:41,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:41,380 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:41,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:41,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:41,580 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:41,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:41,581 INFO L85 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 4 times [2021-11-02 22:42:41,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:41,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209273043] [2021-11-02 22:42:41,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:41,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:41,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:41,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501056022] [2021-11-02 22:42:41,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:42:41,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:41,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:41,589 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:41,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:42:41,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:42:41,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:41,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:42:41,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:41,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:41,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209273043] [2021-11-02 22:42:41,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:41,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501056022] [2021-11-02 22:42:41,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501056022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:41,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:41,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:42:41,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930397725] [2021-11-02 22:42:41,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:42:41,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:42:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:42:41,809 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.875) 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) [2021-11-02 22:42:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:41,875 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-02 22:42:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:42:41,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) 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 [2021-11-02 22:42:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:41,877 INFO L225 Difference]: With dead ends: 32 [2021-11-02 22:42:41,878 INFO L226 Difference]: Without dead ends: 28 [2021-11-02 22:42:41,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:42:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-02 22:42:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-02 22:42:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-02 22:42:41,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2021-11-02 22:42:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:41,885 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-02 22:42:41,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) 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) [2021-11-02 22:42:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-02 22:42:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 22:42:41,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:41,888 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:41,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:42,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:42,093 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1128495004, now seen corresponding path program 4 times [2021-11-02 22:42:42,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:42,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875380111] [2021-11-02 22:42:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:42,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:42,103 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:42,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860932198] [2021-11-02 22:42:42,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:42:42,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:42,105 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:42,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:42:42,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:42:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:42,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 22:42:42,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:42,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:42,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875380111] [2021-11-02 22:42:42,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:42,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860932198] [2021-11-02 22:42:42,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860932198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:42,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:42,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:42:42,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380253200] [2021-11-02 22:42:42,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:42,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:42,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:42,582 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-11-02 22:42:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:42,705 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-02 22:42:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:42:42,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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 [2021-11-02 22:42:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:42,706 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:42:42,706 INFO L226 Difference]: Without dead ends: 30 [2021-11-02 22:42:42,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:42:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-02 22:42:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-02 22:42:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 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) [2021-11-02 22:42:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-02 22:42:42,712 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-11-02 22:42:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:42,712 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-02 22:42:42,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2021-11-02 22:42:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-02 22:42:42,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 22:42:42,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:42,713 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:42,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:42,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:42,914 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2117565153, now seen corresponding path program 5 times [2021-11-02 22:42:42,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:42,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477836285] [2021-11-02 22:42:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:42,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:42,924 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:42,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140110802] [2021-11-02 22:42:42,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:42:42,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:42,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:42,926 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:42,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:42:43,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:42:43,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:43,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:42:43,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:43,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:43,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477836285] [2021-11-02 22:42:43,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:43,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140110802] [2021-11-02 22:42:43,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140110802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:43,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:43,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:42:43,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271744176] [2021-11-02 22:42:43,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:42:43,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:42:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:42:43,499 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:43,567 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-02 22:42:43,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:42:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 22:42:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:43,568 INFO L225 Difference]: With dead ends: 36 [2021-11-02 22:42:43,569 INFO L226 Difference]: Without dead ends: 32 [2021-11-02 22:42:43,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:42:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-02 22:42:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-02 22:42:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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) [2021-11-02 22:42:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-11-02 22:42:43,575 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-11-02 22:42:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:43,575 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-11-02 22:42:43,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-11-02 22:42:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:42:43,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:43,577 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:43,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:43,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:42:43,783 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:43,784 INFO L85 PathProgramCache]: Analyzing trace with hash 881214008, now seen corresponding path program 5 times [2021-11-02 22:42:43,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:43,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446901146] [2021-11-02 22:42:43,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:43,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:43,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:43,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386384948] [2021-11-02 22:42:43,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:42:43,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:43,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:43,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:43,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:42:44,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-02 22:42:44,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:42:44,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:44,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:44,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446901146] [2021-11-02 22:42:44,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:44,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386384948] [2021-11-02 22:42:44,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386384948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:44,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:44,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:42:44,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269369764] [2021-11-02 22:42:44,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:44,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:44,656 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2021-11-02 22:42:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:44,942 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-02 22:42:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:42:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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 [2021-11-02 22:42:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:44,943 INFO L225 Difference]: With dead ends: 38 [2021-11-02 22:42:44,943 INFO L226 Difference]: Without dead ends: 34 [2021-11-02 22:42:44,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:42:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-02 22:42:44,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-02 22:42:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-02 22:42:44,954 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-11-02 22:42:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:44,955 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-02 22:42:44,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) [2021-11-02 22:42:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-02 22:42:44,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:42:44,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:44,956 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:44,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:45,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:42:45,157 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:45,157 INFO L85 PathProgramCache]: Analyzing trace with hash 772479475, now seen corresponding path program 6 times [2021-11-02 22:42:45,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:45,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116103775] [2021-11-02 22:42:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:45,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:45,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:45,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887211181] [2021-11-02 22:42:45,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:42:45,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:45,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:45,168 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:45,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:42:45,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 22:42:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:42:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:45,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:45,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116103775] [2021-11-02 22:42:45,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:45,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887211181] [2021-11-02 22:42:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887211181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:45,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:45,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:42:45,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341118503] [2021-11-02 22:42:45,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:42:45,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:42:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:42:45,522 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-11-02 22:42:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:45,596 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-02 22:42:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:42:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 [2021-11-02 22:42:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:45,597 INFO L225 Difference]: With dead ends: 40 [2021-11-02 22:42:45,597 INFO L226 Difference]: Without dead ends: 36 [2021-11-02 22:42:45,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:42:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-02 22:42:45,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-02 22:42:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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) [2021-11-02 22:42:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-02 22:42:45,603 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2021-11-02 22:42:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:45,604 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-02 22:42:45,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-11-02 22:42:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-02 22:42:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:42:45,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:45,605 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:45,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:45,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:42:45,805 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:45,806 INFO L85 PathProgramCache]: Analyzing trace with hash -629738996, now seen corresponding path program 6 times [2021-11-02 22:42:45,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:45,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088280265] [2021-11-02 22:42:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:45,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:45,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:45,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136317323] [2021-11-02 22:42:45,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:42:45,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:45,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:45,825 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:45,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:42:46,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 22:42:46,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:42:46,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:46,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:46,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088280265] [2021-11-02 22:42:46,794 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:46,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136317323] [2021-11-02 22:42:46,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136317323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:46,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:46,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:42:46,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47988658] [2021-11-02 22:42:46,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:42:46,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:42:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:42:46,796 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-11-02 22:42:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:47,180 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-11-02 22:42:47,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:42:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-11-02 22:42:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:47,181 INFO L225 Difference]: With dead ends: 42 [2021-11-02 22:42:47,181 INFO L226 Difference]: Without dead ends: 38 [2021-11-02 22:42:47,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:42:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-02 22:42:47,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-02 22:42:47,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) [2021-11-02 22:42:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-11-02 22:42:47,187 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2021-11-02 22:42:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:47,188 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-11-02 22:42:47,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-11-02 22:42:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-11-02 22:42:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:42:47,189 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:47,190 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:47,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:47,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:47,396 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:47,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash 445588679, now seen corresponding path program 7 times [2021-11-02 22:42:47,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:47,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774407998] [2021-11-02 22:42:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:47,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:47,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:47,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348504949] [2021-11-02 22:42:47,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:42:47,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:47,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:47,410 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:47,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:42:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:42:47,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:47,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:47,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774407998] [2021-11-02 22:42:47,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:47,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348504949] [2021-11-02 22:42:47,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348504949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:47,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:47,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:42:47,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709184835] [2021-11-02 22:42:47,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:42:47,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:42:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:42:47,802 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:47,889 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-02 22:42:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:42:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 22:42:47,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:47,890 INFO L225 Difference]: With dead ends: 44 [2021-11-02 22:42:47,890 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 22:42:47,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:42:47,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 22:42:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-02 22:42:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) 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) [2021-11-02 22:42:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-02 22:42:47,903 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2021-11-02 22:42:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:47,904 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-02 22:42:47,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-02 22:42:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:42:47,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:47,906 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:47,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:48,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:42:48,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:48,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1239181344, now seen corresponding path program 7 times [2021-11-02 22:42:48,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:48,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771340584] [2021-11-02 22:42:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:48,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:48,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:48,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813766965] [2021-11-02 22:42:48,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:42:48,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:48,133 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:48,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:42:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 22:42:48,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:49,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:49,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771340584] [2021-11-02 22:42:49,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:49,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813766965] [2021-11-02 22:42:49,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813766965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:49,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:49,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:42:49,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583677505] [2021-11-02 22:42:49,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:42:49,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:42:49,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:42:49,130 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-11-02 22:42:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:49,460 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-02 22:42:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:42:49,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 [2021-11-02 22:42:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:49,461 INFO L225 Difference]: With dead ends: 46 [2021-11-02 22:42:49,461 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 22:42:49,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:42:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 22:42:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-02 22:42:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-02 22:42:49,467 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2021-11-02 22:42:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:49,467 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-02 22:42:49,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-11-02 22:42:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-02 22:42:49,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:42:49,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:49,472 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:49,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:49,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:42:49,686 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:49,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1112955493, now seen corresponding path program 8 times [2021-11-02 22:42:49,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:49,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731363456] [2021-11-02 22:42:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:49,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:49,707 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:49,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484071112] [2021-11-02 22:42:49,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:42:49,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:49,709 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:49,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:42:49,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:42:49,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:49,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:42:49,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:50,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:50,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731363456] [2021-11-02 22:42:50,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:50,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484071112] [2021-11-02 22:42:50,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484071112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:50,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:50,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:42:50,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254021099] [2021-11-02 22:42:50,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:42:50,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:50,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:42:50,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:42:50,111 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:50,206 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-11-02 22:42:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:42:50,207 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 22:42:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:50,207 INFO L225 Difference]: With dead ends: 48 [2021-11-02 22:42:50,207 INFO L226 Difference]: Without dead ends: 44 [2021-11-02 22:42:50,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:42:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-02 22:42:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-02 22:42:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 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) [2021-11-02 22:42:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-02 22:42:50,214 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2021-11-02 22:42:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:50,214 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-02 22:42:50,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-02 22:42:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:42:50,215 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:50,216 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:50,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:50,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:50,436 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:50,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash -56544332, now seen corresponding path program 8 times [2021-11-02 22:42:50,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:50,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514522299] [2021-11-02 22:42:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:50,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:50,444 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:50,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866352855] [2021-11-02 22:42:50,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:42:50,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:50,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:50,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:50,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:42:51,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:42:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:51,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 22:42:51,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:51,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:51,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514522299] [2021-11-02 22:42:51,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:51,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866352855] [2021-11-02 22:42:51,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866352855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:51,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:51,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:42:51,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012342219] [2021-11-02 22:42:51,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:42:51,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:42:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:42:51,697 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-11-02 22:42:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:51,922 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-11-02 22:42:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:42:51,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) Word has length 41 [2021-11-02 22:42:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:51,923 INFO L225 Difference]: With dead ends: 50 [2021-11-02 22:42:51,923 INFO L226 Difference]: Without dead ends: 46 [2021-11-02 22:42:51,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:42:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-02 22:42:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-02 22:42:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-02 22:42:51,929 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2021-11-02 22:42:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:51,929 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-02 22:42:51,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 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) [2021-11-02 22:42:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-02 22:42:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:42:51,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:51,930 INFO L513 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:51,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:52,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:52,131 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1529846895, now seen corresponding path program 9 times [2021-11-02 22:42:52,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:52,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227699263] [2021-11-02 22:42:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:52,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:52,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:52,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873320802] [2021-11-02 22:42:52,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:42:52,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:52,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:52,143 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:52,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:42:52,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 22:42:52,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:52,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:42:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:52,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:52,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227699263] [2021-11-02 22:42:52,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:52,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873320802] [2021-11-02 22:42:52,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873320802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:52,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:52,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:42:52,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682796536] [2021-11-02 22:42:52,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:42:52,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:52,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:42:52,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:42:52,756 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:52,876 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-02 22:42:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:42:52,877 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 22:42:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:52,877 INFO L225 Difference]: With dead ends: 52 [2021-11-02 22:42:52,878 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 22:42:52,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:42:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 22:42:52,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-02 22:42:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-11-02 22:42:52,890 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2021-11-02 22:42:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:52,890 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-11-02 22:42:52,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-11-02 22:42:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:42:52,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:52,891 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:52,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:53,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:42:53,097 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:53,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1350878600, now seen corresponding path program 9 times [2021-11-02 22:42:53,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:53,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561985647] [2021-11-02 22:42:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:53,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:53,107 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:53,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789695969] [2021-11-02 22:42:53,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:42:53,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:53,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:53,109 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:53,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:42:53,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-02 22:42:53,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:53,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 22:42:53,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:54,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:54,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561985647] [2021-11-02 22:42:54,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:54,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789695969] [2021-11-02 22:42:54,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789695969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:54,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:54,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 22:42:54,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748892307] [2021-11-02 22:42:54,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:42:54,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:42:54,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:42:54,474 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-11-02 22:42:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:54,832 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-11-02 22:42:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:42:54,836 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 [2021-11-02 22:42:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:54,837 INFO L225 Difference]: With dead ends: 57 [2021-11-02 22:42:54,837 INFO L226 Difference]: Without dead ends: 53 [2021-11-02 22:42:54,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:42:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-02 22:42:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-11-02 22:42:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-11-02 22:42:54,842 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2021-11-02 22:42:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:54,843 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-11-02 22:42:54,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-11-02 22:42:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-11-02 22:42:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:42:54,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:54,844 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:54,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:55,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:42:55,051 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1148586307, now seen corresponding path program 10 times [2021-11-02 22:42:55,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:55,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103357776] [2021-11-02 22:42:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:55,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:55,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:55,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433667825] [2021-11-02 22:42:55,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:42:55,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:55,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:55,067 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:55,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:42:55,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:42:55,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:55,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:42:55,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:55,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:55,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103357776] [2021-11-02 22:42:55,616 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:55,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433667825] [2021-11-02 22:42:55,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433667825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:55,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:55,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:42:55,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683037457] [2021-11-02 22:42:55,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:42:55,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:55,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:42:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:42:55,618 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:55,756 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-11-02 22:42:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:42:55,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 22:42:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:55,757 INFO L225 Difference]: With dead ends: 56 [2021-11-02 22:42:55,757 INFO L226 Difference]: Without dead ends: 52 [2021-11-02 22:42:55,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:42:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-02 22:42:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-02 22:42:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:55,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-02 22:42:55,761 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2021-11-02 22:42:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:55,761 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-02 22:42:55,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-02 22:42:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:42:55,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:55,762 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:55,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:55,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:42:55,963 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:55,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:55,963 INFO L85 PathProgramCache]: Analyzing trace with hash 31673692, now seen corresponding path program 10 times [2021-11-02 22:42:55,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:55,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835297084] [2021-11-02 22:42:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:55,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:55,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:55,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481400280] [2021-11-02 22:42:55,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:42:55,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:55,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:55,974 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:56,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:42:57,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:42:57,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 22:42:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:57,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:57,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835297084] [2021-11-02 22:42:57,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:57,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481400280] [2021-11-02 22:42:57,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481400280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:57,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:57,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 22:42:57,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446296006] [2021-11-02 22:42:57,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:42:57,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:42:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:42:57,960 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:58,263 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-11-02 22:42:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:42:58,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 22:42:58,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:58,265 INFO L225 Difference]: With dead ends: 58 [2021-11-02 22:42:58,265 INFO L226 Difference]: Without dead ends: 54 [2021-11-02 22:42:58,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:42:58,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-02 22:42:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-02 22:42:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-02 22:42:58,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2021-11-02 22:42:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:58,271 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-02 22:42:58,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-02 22:42:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:42:58,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:58,272 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:58,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:58,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:58,473 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:58,473 INFO L85 PathProgramCache]: Analyzing trace with hash 408022039, now seen corresponding path program 11 times [2021-11-02 22:42:58,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:58,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565336120] [2021-11-02 22:42:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:58,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:58,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:58,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999419952] [2021-11-02 22:42:58,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:42:58,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:58,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:58,490 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:58,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:42:59,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 22:42:59,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:42:59,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 22:42:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:42:59,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:59,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565336120] [2021-11-02 22:42:59,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:42:59,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999419952] [2021-11-02 22:42:59,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999419952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:59,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:42:59,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 22:42:59,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436290497] [2021-11-02 22:42:59,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:42:59,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:59,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:42:59,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:42:59,271 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:59,396 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2021-11-02 22:42:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:42:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:42:59,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:59,397 INFO L225 Difference]: With dead ends: 60 [2021-11-02 22:42:59,397 INFO L226 Difference]: Without dead ends: 56 [2021-11-02 22:42:59,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:42:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-02 22:42:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-02 22:42:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-11-02 22:42:59,404 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2021-11-02 22:42:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:59,404 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-11-02 22:42:59,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:59,405 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-11-02 22:42:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:42:59,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:42:59,406 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:59,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:42:59,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:42:59,612 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:42:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1313983280, now seen corresponding path program 11 times [2021-11-02 22:42:59,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:59,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716108997] [2021-11-02 22:42:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:59,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:59,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:42:59,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507444147] [2021-11-02 22:42:59,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:42:59,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:59,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:42:59,626 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:59,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:43:00,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-02 22:43:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 22:43:00,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:00,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:00,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716108997] [2021-11-02 22:43:00,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:00,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507444147] [2021-11-02 22:43:00,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507444147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:00,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:00,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:43:00,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162258162] [2021-11-02 22:43:00,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:43:00,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:43:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:43:00,731 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:01,135 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-11-02 22:43:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:43:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:43:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:01,137 INFO L225 Difference]: With dead ends: 62 [2021-11-02 22:43:01,137 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 22:43:01,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:43:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 22:43:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-02 22:43:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-02 22:43:01,143 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-11-02 22:43:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:01,143 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-02 22:43:01,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-02 22:43:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 22:43:01,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:01,144 INFO L513 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:01,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:43:01,351 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash 51922155, now seen corresponding path program 12 times [2021-11-02 22:43:01,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:01,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302581003] [2021-11-02 22:43:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:01,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:01,363 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:01,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55499590] [2021-11-02 22:43:01,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:43:01,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:01,365 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:01,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:43:01,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 22:43:01,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:01,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:43:01,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:02,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:02,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302581003] [2021-11-02 22:43:02,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:02,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55499590] [2021-11-02 22:43:02,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55499590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:02,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:02,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 22:43:02,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445609803] [2021-11-02 22:43:02,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:43:02,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:02,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:43:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:43:02,192 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:02,333 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-11-02 22:43:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:43:02,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 22:43:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:02,335 INFO L225 Difference]: With dead ends: 64 [2021-11-02 22:43:02,335 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:43:02,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:43:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:43:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-02 22:43:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 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) [2021-11-02 22:43:02,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-11-02 22:43:02,352 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2021-11-02 22:43:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:02,352 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-11-02 22:43:02,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:02,353 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-11-02 22:43:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:43:02,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:02,354 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:02,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:02,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:43:02,560 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:02,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1595588860, now seen corresponding path program 12 times [2021-11-02 22:43:02,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:02,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039108871] [2021-11-02 22:43:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:02,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:02,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:02,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939623881] [2021-11-02 22:43:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:43:02,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:02,587 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:02,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:43:07,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 22:43:07,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:07,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 22:43:07,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:08,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:08,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039108871] [2021-11-02 22:43:08,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:08,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939623881] [2021-11-02 22:43:08,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939623881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:08,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:08,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:43:08,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470294052] [2021-11-02 22:43:08,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:43:08,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:08,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:43:08,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:43:08,495 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:09,004 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-11-02 22:43:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:43:09,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-02 22:43:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:09,005 INFO L225 Difference]: With dead ends: 66 [2021-11-02 22:43:09,005 INFO L226 Difference]: Without dead ends: 62 [2021-11-02 22:43:09,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:43:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-02 22:43:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-02 22:43:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-11-02 22:43:09,009 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2021-11-02 22:43:09,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:09,009 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-11-02 22:43:09,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-11-02 22:43:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:43:09,010 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:09,010 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:09,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:09,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:43:09,210 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:09,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:09,211 INFO L85 PathProgramCache]: Analyzing trace with hash -23194689, now seen corresponding path program 13 times [2021-11-02 22:43:09,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:09,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185742709] [2021-11-02 22:43:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:09,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:09,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:09,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170266115] [2021-11-02 22:43:09,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:43:09,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:09,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:09,220 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:09,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:43:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:09,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:43:09,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:10,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:10,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185742709] [2021-11-02 22:43:10,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:10,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170266115] [2021-11-02 22:43:10,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170266115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:10,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:10,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:43:10,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540943473] [2021-11-02 22:43:10,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:43:10,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:10,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:43:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:43:10,067 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:10,208 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-02 22:43:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:43:10,209 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-02 22:43:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:10,209 INFO L225 Difference]: With dead ends: 68 [2021-11-02 22:43:10,209 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 22:43:10,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-11-02 22:43:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 22:43:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-02 22:43:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-02 22:43:10,217 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2021-11-02 22:43:10,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:10,217 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-02 22:43:10,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:10,217 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-02 22:43:10,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:43:10,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:10,218 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:10,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:10,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:43:10,432 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:10,432 INFO L85 PathProgramCache]: Analyzing trace with hash -768431912, now seen corresponding path program 13 times [2021-11-02 22:43:10,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:10,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50604127] [2021-11-02 22:43:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:10,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:10,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:10,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587081734] [2021-11-02 22:43:10,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:43:10,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:10,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:10,443 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:10,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:43:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:11,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 22:43:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:12,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:12,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50604127] [2021-11-02 22:43:12,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:12,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587081734] [2021-11-02 22:43:12,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587081734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:12,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:12,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:43:12,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67935084] [2021-11-02 22:43:12,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:43:12,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:43:12,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:43:12,232 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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) [2021-11-02 22:43:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:12,654 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-11-02 22:43:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:43:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-02 22:43:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:12,655 INFO L225 Difference]: With dead ends: 70 [2021-11-02 22:43:12,655 INFO L226 Difference]: Without dead ends: 66 [2021-11-02 22:43:12,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:43:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-02 22:43:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-02 22:43:12,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-11-02 22:43:12,662 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2021-11-02 22:43:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:12,663 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-11-02 22:43:12,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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) [2021-11-02 22:43:12,663 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-11-02 22:43:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:43:12,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:12,664 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:12,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:12,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:12,871 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash 305682579, now seen corresponding path program 14 times [2021-11-02 22:43:12,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:12,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980276544] [2021-11-02 22:43:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:12,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:12,881 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:12,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254248817] [2021-11-02 22:43:12,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:43:12,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:12,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:12,882 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:12,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:43:13,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:43:13,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:13,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:43:13,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:13,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:13,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980276544] [2021-11-02 22:43:13,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:13,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254248817] [2021-11-02 22:43:13,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254248817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:13,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:13,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:43:13,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129912317] [2021-11-02 22:43:13,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:43:13,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:13,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:43:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:43:13,680 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:13,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:13,861 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-11-02 22:43:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 22:43:13,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 22:43:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:13,863 INFO L225 Difference]: With dead ends: 72 [2021-11-02 22:43:13,863 INFO L226 Difference]: Without dead ends: 68 [2021-11-02 22:43:13,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:43:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-02 22:43:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-02 22:43:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-02 22:43:13,869 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2021-11-02 22:43:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:13,870 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-02 22:43:13,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-02 22:43:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 22:43:13,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:13,870 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:13,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-02 22:43:14,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:14,091 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1750010028, now seen corresponding path program 14 times [2021-11-02 22:43:14,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:14,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234362708] [2021-11-02 22:43:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:14,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:14,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:14,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644272605] [2021-11-02 22:43:14,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:43:14,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:14,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:14,175 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:14,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:43:15,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:43:15,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:15,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 22:43:15,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:16,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:16,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234362708] [2021-11-02 22:43:16,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:16,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644272605] [2021-11-02 22:43:16,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644272605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:16,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:16,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:43:16,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857485636] [2021-11-02 22:43:16,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:43:16,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:16,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:43:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:43:16,289 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:16,849 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-11-02 22:43:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:43:16,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-02 22:43:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:16,850 INFO L225 Difference]: With dead ends: 74 [2021-11-02 22:43:16,850 INFO L226 Difference]: Without dead ends: 70 [2021-11-02 22:43:16,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:43:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-02 22:43:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-02 22:43:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-02 22:43:16,856 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2021-11-02 22:43:16,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:16,856 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-02 22:43:16,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:16,857 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-02 22:43:16,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 22:43:16,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:16,858 INFO L513 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:16,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:17,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:17,060 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:17,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1833168025, now seen corresponding path program 15 times [2021-11-02 22:43:17,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:17,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368979349] [2021-11-02 22:43:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:17,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:17,069 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:17,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563313760] [2021-11-02 22:43:17,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:43:17,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:17,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:17,070 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:17,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:43:18,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 22:43:18,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:43:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:18,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:18,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368979349] [2021-11-02 22:43:18,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:18,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563313760] [2021-11-02 22:43:18,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563313760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:18,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:18,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:43:18,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058550489] [2021-11-02 22:43:18,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:43:18,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:18,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:43:18,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:43:18,383 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:18,573 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-11-02 22:43:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:43:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 22:43:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:18,574 INFO L225 Difference]: With dead ends: 76 [2021-11-02 22:43:18,574 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 22:43:18,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:43:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 22:43:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-02 22:43:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-02 22:43:18,582 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2021-11-02 22:43:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:18,582 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-02 22:43:18,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-02 22:43:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:43:18,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:18,583 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:18,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:18,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:18,792 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash -691052928, now seen corresponding path program 15 times [2021-11-02 22:43:18,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:18,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320321461] [2021-11-02 22:43:18,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:18,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:18,813 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:18,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861370035] [2021-11-02 22:43:18,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:43:18,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:18,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:18,815 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:18,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 22:43:20,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-02 22:43:20,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:20,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-02 22:43:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:20,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:20,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320321461] [2021-11-02 22:43:20,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:20,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861370035] [2021-11-02 22:43:20,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861370035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:20,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:20,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:43:20,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505726362] [2021-11-02 22:43:20,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:43:20,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:43:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:43:20,852 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:21,665 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-11-02 22:43:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:43:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-02 22:43:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:21,666 INFO L225 Difference]: With dead ends: 78 [2021-11-02 22:43:21,666 INFO L226 Difference]: Without dead ends: 74 [2021-11-02 22:43:21,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:43:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-02 22:43:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-02 22:43:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-11-02 22:43:21,670 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 69 [2021-11-02 22:43:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:21,670 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-11-02 22:43:21,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-11-02 22:43:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:43:21,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:21,672 INFO L513 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:21,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:21,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:21,882 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:21,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1652442171, now seen corresponding path program 16 times [2021-11-02 22:43:21,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:21,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157155546] [2021-11-02 22:43:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:21,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:21,906 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:21,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920236063] [2021-11-02 22:43:21,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:43:21,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:21,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:21,918 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:21,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 22:43:22,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:43:22,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:22,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 22:43:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:22,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:22,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157155546] [2021-11-02 22:43:22,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:22,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920236063] [2021-11-02 22:43:22,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920236063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:22,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:22,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:43:22,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488612236] [2021-11-02 22:43:22,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:43:22,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:22,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:43:22,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:43:22,920 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:23,139 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-11-02 22:43:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:43:23,140 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 22:43:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:23,141 INFO L225 Difference]: With dead ends: 80 [2021-11-02 22:43:23,141 INFO L226 Difference]: Without dead ends: 76 [2021-11-02 22:43:23,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:43:23,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-02 22:43:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-02 22:43:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-11-02 22:43:23,146 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2021-11-02 22:43:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:23,146 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-11-02 22:43:23,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:23,146 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-11-02 22:43:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 22:43:23,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:23,147 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:23,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-02 22:43:23,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 22:43:23,347 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1094145452, now seen corresponding path program 16 times [2021-11-02 22:43:23,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:23,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253571879] [2021-11-02 22:43:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:23,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:23,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:23,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32214504] [2021-11-02 22:43:23,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:43:23,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:23,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:23,364 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:23,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 22:43:24,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:43:24,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-02 22:43:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:25,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:25,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253571879] [2021-11-02 22:43:25,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:25,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32214504] [2021-11-02 22:43:25,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32214504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:25,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:25,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-02 22:43:25,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487624720] [2021-11-02 22:43:25,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:43:25,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:43:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:43:25,587 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:26,107 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-11-02 22:43:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:43:26,108 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-02 22:43:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:26,109 INFO L225 Difference]: With dead ends: 82 [2021-11-02 22:43:26,109 INFO L226 Difference]: Without dead ends: 78 [2021-11-02 22:43:26,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:43:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-02 22:43:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-02 22:43:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-11-02 22:43:26,116 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 73 [2021-11-02 22:43:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:26,117 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-11-02 22:43:26,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-11-02 22:43:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:43:26,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:26,118 INFO L513 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:26,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:26,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:43:26,328 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash 827583247, now seen corresponding path program 17 times [2021-11-02 22:43:26,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:26,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575465635] [2021-11-02 22:43:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:26,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:26,362 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:26,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290301542] [2021-11-02 22:43:26,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:43:26,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:26,365 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:26,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 22:43:30,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 22:43:30,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:43:30,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:30,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:30,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575465635] [2021-11-02 22:43:30,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:30,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290301542] [2021-11-02 22:43:30,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290301542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:30,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:30,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:43:30,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161431156] [2021-11-02 22:43:30,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:43:30,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:30,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:43:30,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:43:30,859 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:31,084 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-11-02 22:43:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 22:43:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-02 22:43:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:31,085 INFO L225 Difference]: With dead ends: 84 [2021-11-02 22:43:31,085 INFO L226 Difference]: Without dead ends: 80 [2021-11-02 22:43:31,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:43:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-02 22:43:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-02 22:43:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2021-11-02 22:43:31,093 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2021-11-02 22:43:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:31,094 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2021-11-02 22:43:31,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2021-11-02 22:43:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:43:31,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:31,095 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:31,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 22:43:31,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 22:43:31,307 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 785378344, now seen corresponding path program 17 times [2021-11-02 22:43:31,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:31,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405019751] [2021-11-02 22:43:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:31,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:31,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:31,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606333027] [2021-11-02 22:43:31,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:43:31,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:31,320 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:31,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 22:43:36,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-02 22:43:36,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-02 22:43:36,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:37,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:37,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405019751] [2021-11-02 22:43:37,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:37,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606333027] [2021-11-02 22:43:37,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606333027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:37,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:37,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 22:43:37,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605612073] [2021-11-02 22:43:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:43:37,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:43:37,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:43:37,679 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:38,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:38,257 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-11-02 22:43:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:43:38,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-02 22:43:38,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:38,259 INFO L225 Difference]: With dead ends: 86 [2021-11-02 22:43:38,259 INFO L226 Difference]: Without dead ends: 82 [2021-11-02 22:43:38,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:43:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-02 22:43:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-02 22:43:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-02 22:43:38,267 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2021-11-02 22:43:38,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:38,267 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-02 22:43:38,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-02 22:43:38,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:43:38,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:38,268 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:38,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:38,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:43:38,469 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1131280413, now seen corresponding path program 18 times [2021-11-02 22:43:38,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:38,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402979411] [2021-11-02 22:43:38,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:38,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:38,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:38,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453809431] [2021-11-02 22:43:38,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:43:38,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:38,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:38,497 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:38,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 22:43:40,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 22:43:40,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:40,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 22:43:40,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:40,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:40,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402979411] [2021-11-02 22:43:40,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:40,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453809431] [2021-11-02 22:43:40,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453809431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:40,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:40,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-02 22:43:40,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327151756] [2021-11-02 22:43:40,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:43:40,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:43:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:43:40,634 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:40,862 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-11-02 22:43:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 22:43:40,867 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-02 22:43:40,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:40,868 INFO L225 Difference]: With dead ends: 88 [2021-11-02 22:43:40,868 INFO L226 Difference]: Without dead ends: 84 [2021-11-02 22:43:40,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:43:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-02 22:43:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-02 22:43:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-11-02 22:43:40,876 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2021-11-02 22:43:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:40,876 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-11-02 22:43:40,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-11-02 22:43:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:43:40,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:40,877 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:40,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-02 22:43:41,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:43:41,084 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:41,084 INFO L85 PathProgramCache]: Analyzing trace with hash -486923268, now seen corresponding path program 18 times [2021-11-02 22:43:41,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:41,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681223228] [2021-11-02 22:43:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:41,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:41,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:41,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223612234] [2021-11-02 22:43:41,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:43:41,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:41,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:41,095 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:41,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 22:43:42,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 22:43:42,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:43:42,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-02 22:43:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:43,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:43,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681223228] [2021-11-02 22:43:43,678 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:43,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223612234] [2021-11-02 22:43:43,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223612234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:43,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:43,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:43:43,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360271550] [2021-11-02 22:43:43,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:43:43,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:43:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:43:43,680 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:44,217 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-11-02 22:43:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:43:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-02 22:43:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:44,218 INFO L225 Difference]: With dead ends: 90 [2021-11-02 22:43:44,219 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 22:43:44,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:43:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 22:43:44,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-02 22:43:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2021-11-02 22:43:44,225 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 81 [2021-11-02 22:43:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:44,225 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2021-11-02 22:43:44,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:44,226 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2021-11-02 22:43:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:43:44,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:44,227 INFO L513 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:44,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-02 22:43:44,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:43:44,427 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash 252549815, now seen corresponding path program 19 times [2021-11-02 22:43:44,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:44,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049987254] [2021-11-02 22:43:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:44,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:44,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:44,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714095421] [2021-11-02 22:43:44,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:43:44,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:44,442 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:44,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 22:43:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:43:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:45,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:45,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049987254] [2021-11-02 22:43:45,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:45,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714095421] [2021-11-02 22:43:45,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714095421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:45,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:45,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 22:43:45,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910182644] [2021-11-02 22:43:45,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:43:45,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:45,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:43:45,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:43:45,725 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:46,007 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2021-11-02 22:43:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:43:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-02 22:43:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:46,008 INFO L225 Difference]: With dead ends: 92 [2021-11-02 22:43:46,009 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 22:43:46,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:43:46,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 22:43:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-02 22:43:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-11-02 22:43:46,016 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2021-11-02 22:43:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:46,016 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-11-02 22:43:46,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-11-02 22:43:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 22:43:46,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:46,017 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:46,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:46,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:46,224 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:46,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2065935920, now seen corresponding path program 19 times [2021-11-02 22:43:46,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:46,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923670264] [2021-11-02 22:43:46,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:46,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:46,236 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:46,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552650820] [2021-11-02 22:43:46,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:43:46,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:46,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:46,238 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:46,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 22:43:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:47,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-02 22:43:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:43:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:48,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:48,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923670264] [2021-11-02 22:43:48,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:43:48,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552650820] [2021-11-02 22:43:48,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552650820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:48,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:43:48,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-02 22:43:48,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593914141] [2021-11-02 22:43:48,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:43:48,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:48,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:43:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:43:48,389 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:49,038 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-11-02 22:43:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:43:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-02 22:43:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:49,039 INFO L225 Difference]: With dead ends: 94 [2021-11-02 22:43:49,039 INFO L226 Difference]: Without dead ends: 90 [2021-11-02 22:43:49,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:43:49,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-02 22:43:49,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-02 22:43:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-11-02 22:43:49,046 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 85 [2021-11-02 22:43:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:49,047 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-11-02 22:43:49,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 24 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-11-02 22:43:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-02 22:43:49,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:43:49,048 INFO L513 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:49,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:49,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 22:43:49,252 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1055153269, now seen corresponding path program 20 times [2021-11-02 22:43:49,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:49,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172559483] [2021-11-02 22:43:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:49,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:49,274 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:43:49,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561278443] [2021-11-02 22:43:49,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:43:49,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:49,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:43:49,278 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:49,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 22:43:50,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:43:50,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-02 22:43:50,927 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:43:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:43:51,228 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:43:51,228 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-02 22:43:51,229 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:43:51,231 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:43:51,232 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:43:51,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:51,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-02 22:43:51,446 INFO L731 BasicCegarLoop]: Path program histogram: [20, 19, 3, 1] [2021-11-02 22:43:51,450 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:43:51,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:43:51 BoogieIcfgContainer [2021-11-02 22:43:51,561 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:43:51,561 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:43:51,563 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:43:51,563 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:43:51,564 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:42:35" (3/4) ... [2021-11-02 22:43:51,565 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-02 22:43:51,652 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/witness.graphml [2021-11-02 22:43:51,653 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:43:51,654 INFO L168 Benchmark]: Toolchain (without parser) took 77046.99 ms. Allocated memory was 86.0 MB in the beginning and 264.2 MB in the end (delta: 178.3 MB). Free memory was 49.7 MB in the beginning and 54.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 172.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:51,655 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 66.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:43:51,655 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.99 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.5 MB in the beginning and 80.6 MB in the end (delta: -31.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:51,656 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.54 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:43:51,656 INFO L168 Benchmark]: Boogie Preprocessor took 46.09 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 78.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:51,657 INFO L168 Benchmark]: RCFGBuilder took 351.28 ms. Allocated memory is still 104.9 MB. Free memory was 78.1 MB in the beginning and 68.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:51,657 INFO L168 Benchmark]: TraceAbstraction took 76191.63 ms. Allocated memory was 104.9 MB in the beginning and 264.2 MB in the end (delta: 159.4 MB). Free memory was 68.1 MB in the beginning and 61.7 MB in the end (delta: 6.4 MB). Peak memory consumption was 190.0 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:51,658 INFO L168 Benchmark]: Witness Printer took 91.52 ms. Allocated memory is still 264.2 MB. Free memory was 61.7 MB in the beginning and 54.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 22:43:51,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 66.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.99 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 49.5 MB in the beginning and 80.6 MB in the end (delta: -31.2 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.54 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.09 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 78.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 351.28 ms. Allocated memory is still 104.9 MB. Free memory was 78.1 MB in the beginning and 68.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 76191.63 ms. Allocated memory was 104.9 MB in the beginning and 264.2 MB in the end (delta: 159.4 MB). Free memory was 68.1 MB in the beginning and 61.7 MB in the end (delta: 6.4 MB). Peak memory consumption was 190.0 MB. Max. memory is 16.1 GB. * Witness Printer took 91.52 ms. Allocated memory is still 264.2 MB. Free memory was 61.7 MB in the beginning and 54.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=11] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=11] [L27] EXPR counter++ VAL [counter=12] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=12] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=12] [L27] EXPR counter++ VAL [counter=13] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=13] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=13] [L27] EXPR counter++ VAL [counter=14] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=14] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=14] [L27] EXPR counter++ VAL [counter=15] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=15] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=15] [L27] EXPR counter++ VAL [counter=16] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=16] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=16] [L27] EXPR counter++ VAL [counter=17] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=17] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=17] [L27] EXPR counter++ VAL [counter=18] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=18] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=18] [L27] EXPR counter++ VAL [counter=19] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=19] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=19] [L27] EXPR counter++ VAL [counter=20] [L27] COND TRUE counter++<20 [L10] COND FALSE !(!(cond)) VAL [counter=20] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=20] [L27] EXPR counter++ VAL [counter=21] [L27] COND FALSE !(counter++<20) [L10] COND TRUE !(cond) VAL [counter=21] [L12] reach_error() VAL [counter=21] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 75.9s, OverallIterations: 43, TraceHistogramMax: 21, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 10.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 762 SDtfs, 176 SDslu, 7931 SDs, 0 SdLazy, 8271 SolverSat, 85 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2066 GetRequests, 1343 SyntacticMatches, 0 SemanticMatches, 723 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=42, InterpolantAutomatonStates: 767, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 42 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 26.6s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 1959 NumberOfCodeBlocks, 1951 NumberOfCodeBlocksAsserted, 250 NumberOfCheckSat, 1830 ConstructedInterpolants, 0 QuantifiedInterpolants, 9431 SizeOfPredicates, 283 NumberOfNonLiveVariables, 8952 ConjunctsInSsa, 1403 ConjunctsInUnsatCore, 42 InterpolantComputations, 1 PerfectInterpolantSequences, 20/10294 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-02 22:43:51,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8256824-5cc2-46f3-8cbe-841d7333afb7/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE