./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.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_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:01:36,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:01:36,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:01:36,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:01:36,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:01:36,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:01:36,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:01:36,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:01:36,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:01:36,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:01:36,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:01:36,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:01:36,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:01:36,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:01:36,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:01:36,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:01:36,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:01:36,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:01:36,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:01:36,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:01:36,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:01:36,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:01:36,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:01:36,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:01:36,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:01:36,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:01:36,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:01:36,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:01:36,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:01:36,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:01:36,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:01:36,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:01:36,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:01:36,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:01:36,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:01:36,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:01:36,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:01:36,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:01:36,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:01:36,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:01:36,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:01:36,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:01:37,032 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:01:37,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:01:37,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:01:37,034 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:01:37,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:01:37,034 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:01:37,034 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:01:37,035 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:01:37,041 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:01:37,041 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:01:37,042 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:01:37,042 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:01:37,042 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:01:37,043 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:01:37,043 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:01:37,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:01:37,044 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:01:37,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:01:37,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:01:37,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:01:37,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:01:37,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:01:37,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:01:37,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:01:37,045 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:01:37,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:01:37,046 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:01:37,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:01:37,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:01:37,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:01:37,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:01:37,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:01:37,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:01:37,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:01:37,049 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:01:37,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:01:37,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:01:37,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:01:37,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:01:37,050 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2616f51a0d79e0bd682803708141b0dc94462ecdbaee78ea9cc6b43878e4310d [2021-11-03 05:01:37,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:01:37,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:01:37,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:01:37,332 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:01:37,332 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:01:37,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2021-11-03 05:01:37,405 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/data/91b210c96/4efff6f4173147eb8caf89e3f14073e6/FLAG3e1d4fcda [2021-11-03 05:01:37,874 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:01:37,874 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c [2021-11-03 05:01:37,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/data/91b210c96/4efff6f4173147eb8caf89e3f14073e6/FLAG3e1d4fcda [2021-11-03 05:01:38,274 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/data/91b210c96/4efff6f4173147eb8caf89e3f14073e6 [2021-11-03 05:01:38,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:01:38,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:01:38,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:01:38,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:01:38,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:01:38,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6d639a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38, skipping insertion in model container [2021-11-03 05:01:38,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:01:38,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:01:38,491 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_2c61b9d7-e578-4148-a035-2f89d7d9ec61/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2021-11-03 05:01:38,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:01:38,528 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:01:38,537 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_2c61b9d7-e578-4148-a035-2f89d7d9ec61/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_unwindbound50.c[525,538] [2021-11-03 05:01:38,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:01:38,566 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:01:38,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38 WrapperNode [2021-11-03 05:01:38,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:01:38,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:01:38,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:01:38,568 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:01:38,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:01:38,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:01:38,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:01:38,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:01:38,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:01:38,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:01:38,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:01:38,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:01:38,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (1/1) ... [2021-11-03 05:01:38,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:01:38,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:01:38,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:01:38,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:01:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:01:38,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:01:38,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:01:38,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:01:39,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:01:39,300 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-11-03 05:01:39,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:01:39 BoogieIcfgContainer [2021-11-03 05:01:39,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:01:39,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:01:39,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:01:39,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:01:39,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:01:38" (1/3) ... [2021-11-03 05:01:39,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59131f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:01:39, skipping insertion in model container [2021-11-03 05:01:39,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:01:38" (2/3) ... [2021-11-03 05:01:39,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59131f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:01:39, skipping insertion in model container [2021-11-03 05:01:39,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:01:39" (3/3) ... [2021-11-03 05:01:39,313 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound50.c [2021-11-03 05:01:39,317 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:01:39,317 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-03 05:01:39,360 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:01:39,366 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=FINITE_AUTOMATA, 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 [2021-11-03 05:01:39,366 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-03 05:01:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:01:39,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:39,386 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:01:39,386 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:01:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1143465249, now seen corresponding path program 1 times [2021-11-03 05:01:39,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:01:39,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826650506] [2021-11-03 05:01:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:39,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:01:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:39,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:01:39,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826650506] [2021-11-03 05:01:39,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826650506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:39,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:39,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:01:39,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334164847] [2021-11-03 05:01:39,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:01:39,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:01:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:01:39,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:01:39,614 INFO L87 Difference]: Start difference. First operand has 44 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 43 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-11-03 05:01:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:39,631 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-11-03 05:01:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:01:39,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2021-11-03 05:01:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:39,640 INFO L225 Difference]: With dead ends: 84 [2021-11-03 05:01:39,640 INFO L226 Difference]: Without dead ends: 42 [2021-11-03 05:01:39,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:01:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-03 05:01:39,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-03 05:01:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 41 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) [2021-11-03 05:01:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-11-03 05:01:39,682 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 6 [2021-11-03 05:01:39,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:39,695 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-11-03 05:01:39,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2021-11-03 05:01:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-11-03 05:01:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-03 05:01:39,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:39,696 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:01:39,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:01:39,697 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:01:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:39,704 INFO L85 PathProgramCache]: Analyzing trace with hash 651938503, now seen corresponding path program 1 times [2021-11-03 05:01:39,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:01:39,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789944541] [2021-11-03 05:01:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:39,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:01:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:39,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:01:39,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789944541] [2021-11-03 05:01:39,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789944541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:39,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:39,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:01:39,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060681343] [2021-11-03 05:01:39,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:01:39,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:01:39,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:01:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:01:39,839 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:39,861 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-11-03 05:01:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:01:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-03 05:01:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:39,863 INFO L225 Difference]: With dead ends: 82 [2021-11-03 05:01:39,863 INFO L226 Difference]: Without dead ends: 44 [2021-11-03 05:01:39,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:01:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-03 05:01:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-03 05:01:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 43 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) [2021-11-03 05:01:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-03 05:01:39,870 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 7 [2021-11-03 05:01:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:39,871 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-03 05:01:39,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-03 05:01:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:01:39,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:39,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:01:39,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:01:39,872 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:01:39,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:39,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1215948133, now seen corresponding path program 1 times [2021-11-03 05:01:39,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:01:39,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343703454] [2021-11-03 05:01:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:39,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:01:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:40,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:01:40,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343703454] [2021-11-03 05:01:40,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343703454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:40,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:40,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:01:40,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825345023] [2021-11-03 05:01:40,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:01:40,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:01:40,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:01:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:01:40,163 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:51,651 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-11-03 05:01:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:01:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-03 05:01:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:51,659 INFO L225 Difference]: With dead ends: 87 [2021-11-03 05:01:51,659 INFO L226 Difference]: Without dead ends: 69 [2021-11-03 05:01:51,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:01:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-03 05:01:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-11-03 05:01:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-11-03 05:01:51,671 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 8 [2021-11-03 05:01:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:51,672 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-11-03 05:01:51,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-11-03 05:01:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 05:01:51,673 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:51,673 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:01:51,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:01:51,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:01:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash 960330495, now seen corresponding path program 1 times [2021-11-03 05:01:51,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:01:51,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871351001] [2021-11-03 05:01:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:51,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:01:51,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:01:51,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5639257] [2021-11-03 05:01:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:51,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:01:51,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:01:51,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:01:51,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:01:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:51,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:01:51,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:51,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:52,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:01:52,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871351001] [2021-11-03 05:01:52,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:01:52,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5639257] [2021-11-03 05:01:52,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5639257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:52,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:52,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-03 05:01:52,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180507330] [2021-11-03 05:01:52,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:01:52,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:01:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:01:52,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:01:52,031 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2021-11-03 05:01:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:52,132 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2021-11-03 05:01:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:01:52,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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 9 [2021-11-03 05:01:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:52,134 INFO L225 Difference]: With dead ends: 126 [2021-11-03 05:01:52,134 INFO L226 Difference]: Without dead ends: 112 [2021-11-03 05:01:52,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:01:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-03 05:01:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2021-11-03 05:01:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 82 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-11-03 05:01:52,148 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 9 [2021-11-03 05:01:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:52,149 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-11-03 05:01:52,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 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) [2021-11-03 05:01:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-11-03 05:01:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 05:01:52,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:52,150 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:01:52,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:52,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:01:52,367 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:01:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash 975471712, now seen corresponding path program 1 times [2021-11-03 05:01:52,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:01:52,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477967389] [2021-11-03 05:01:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:52,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:01:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:52,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:01:52,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477967389] [2021-11-03 05:01:52,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477967389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:01:52,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9887040] [2021-11-03 05:01:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:52,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:01:52,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:01:52,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:01:52,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:01:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:52,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:01:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:52,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:52,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9887040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:52,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043227402] [2021-11-03 05:01:52,699 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:01:52,699 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:01:52,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:01:52,711 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:01:52,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:01:52,750 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,756 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:01:52,762 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,763 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:01:52,766 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:01:52,766 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,769 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:01:52,775 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-03 05:01:52,811 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_17|], 21=[|v_#valid_18|]} [2021-11-03 05:01:52,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:01:52,864 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,871 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:01:52,872 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,877 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:01:52,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:01:52,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:01:52,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,898 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:01:52,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,899 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:01:52,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:01:52,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:52,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:52,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 05:01:52,981 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:01:52,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:52,986 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:01:52,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:01:52,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:52,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,001 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,004 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 05:01:53,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:01:53,005 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-03 05:01:53,011 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:01:53,020 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 05:01:53,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 05:01:53,028 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:01:53,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,168 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 326 [2021-11-03 05:01:53,222 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-03 05:01:53,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-03 05:01:53,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:53,392 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 05:01:53,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:01:53,397 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,399 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:01:53,402 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-03 05:01:53,417 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 05:01:53,420 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:01:53,424 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-03 05:01:53,427 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-03 05:01:53,431 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,433 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:01:53,438 INFO L180 QuantifierPusher]: treesize reduction 89, result has 1.1 percent of original size [2021-11-03 05:01:53,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:01:53,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:53,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:01:53,444 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:01:53,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1043227402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:53,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:01:53,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 14 [2021-11-03 05:01:53,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189523286] [2021-11-03 05:01:53,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:01:53,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:01:53,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:01:53,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:01:53,810 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:57,730 INFO L93 Difference]: Finished difference Result 207 states and 240 transitions. [2021-11-03 05:01:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:01:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2021-11-03 05:01:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:57,734 INFO L225 Difference]: With dead ends: 207 [2021-11-03 05:01:57,734 INFO L226 Difference]: Without dead ends: 151 [2021-11-03 05:01:57,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:01:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-03 05:01:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 85. [2021-11-03 05:01:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2021-11-03 05:01:57,765 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 10 [2021-11-03 05:01:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:57,765 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2021-11-03 05:01:57,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2021-11-03 05:01:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:01:57,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:57,766 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:01:57,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:57,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:01:57,983 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:01:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:57,983 INFO L85 PathProgramCache]: Analyzing trace with hash 223646754, now seen corresponding path program 1 times [2021-11-03 05:01:57,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:01:57,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437695712] [2021-11-03 05:01:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:57,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:01:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:58,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:01:58,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437695712] [2021-11-03 05:01:58,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437695712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:01:58,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958339485] [2021-11-03 05:01:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:58,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:01:58,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:01:58,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:01:58,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 05:01:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:58,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-03 05:01:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:58,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:58,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958339485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:58,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [704856808] [2021-11-03 05:01:58,947 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-03 05:01:58,947 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:01:58,948 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:01:58,948 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:01:58,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:01:58,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:58,961 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:01:58,962 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:58,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:01:58,965 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:01:58,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:58,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:01:58,972 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-03 05:01:58,982 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_18|], 21=[|v_#valid_19|]} [2021-11-03 05:01:58,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:01:59,016 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:01:59,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:01:59,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:01:59,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:01:59,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:01:59,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:01:59,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:01:59,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:59,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 05:01:59,095 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:01:59,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:01:59,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:01:59,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 05:01:59,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:01:59,112 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-03 05:01:59,115 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:01:59,124 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 05:01:59,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 05:01:59,130 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,133 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:01:59,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 326 [2021-11-03 05:01:59,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-03 05:01:59,260 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,269 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 348 [2021-11-03 05:01:59,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:01:59,367 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 05:01:59,370 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:01:59,372 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:01:59,376 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,379 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-03 05:01:59,386 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 05:01:59,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:01:59,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,392 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:01:59,398 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:01:59,402 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-11-03 05:01:59,407 INFO L180 QuantifierPusher]: treesize reduction 4, result has 96.0 percent of original size [2021-11-03 05:01:59,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-11-03 05:01:59,416 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:02:00,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:02:00,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-03 05:02:00,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-03 05:02:00,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455439464] [2021-11-03 05:02:00,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:02:00,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:02:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:02:00,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-03 05:02:00,236 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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) [2021-11-03 05:02:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:31,565 INFO L93 Difference]: Finished difference Result 183 states and 213 transitions. [2021-11-03 05:02:31,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 05:02:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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 11 [2021-11-03 05:02:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:31,567 INFO L225 Difference]: With dead ends: 183 [2021-11-03 05:02:31,567 INFO L226 Difference]: Without dead ends: 121 [2021-11-03 05:02:31,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-11-03 05:02:31,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-03 05:02:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-11-03 05:02:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 100 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2021-11-03 05:02:31,588 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 11 [2021-11-03 05:02:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:31,588 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2021-11-03 05:02:31,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 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) [2021-11-03 05:02:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2021-11-03 05:02:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 05:02:31,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:31,590 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:02:31,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:31,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-03 05:02:31,805 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:02:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:31,805 INFO L85 PathProgramCache]: Analyzing trace with hash 73924353, now seen corresponding path program 1 times [2021-11-03 05:02:31,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:02:31,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812278112] [2021-11-03 05:02:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:31,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:02:31,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:02:31,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928729223] [2021-11-03 05:02:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:31,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:02:31,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:02:31,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:02:31,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-03 05:02:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:02:31,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:32,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:37,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:02:37,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812278112] [2021-11-03 05:02:37,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:02:37,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928729223] [2021-11-03 05:02:37,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928729223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:37,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:37,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:02:37,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772589117] [2021-11-03 05:02:37,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:02:37,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:02:37,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:02:37,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:02:37,872 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:08,863 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2021-11-03 05:03:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:03:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-03 05:03:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:08,864 INFO L225 Difference]: With dead ends: 107 [2021-11-03 05:03:08,864 INFO L226 Difference]: Without dead ends: 87 [2021-11-03 05:03:08,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:03:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-03 05:03:08,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-03 05:03:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.2179487179487178) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-11-03 05:03:08,874 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 12 [2021-11-03 05:03:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:08,875 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-11-03 05:03:08,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:08,875 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-11-03 05:03:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-03 05:03:08,890 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:08,890 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:08,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:09,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:09,091 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:03:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1809155898, now seen corresponding path program 1 times [2021-11-03 05:03:09,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:09,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008638007] [2021-11-03 05:03:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:09,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:09,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:03:09,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743592680] [2021-11-03 05:03:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:09,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:09,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:09,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:03:09,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-03 05:03:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:09,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:03:09,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:09,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:09,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:09,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008638007] [2021-11-03 05:03:09,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:03:09,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743592680] [2021-11-03 05:03:09,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743592680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:03:09,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [429205833] [2021-11-03 05:03:09,435 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-03 05:03:09,435 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 05:03:09,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 05:03:09,435 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 05:03:09,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 05:03:09,442 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,443 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:03:09,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:03:09,444 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 05:03:09,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,445 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 05:03:09,447 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-11-03 05:03:09,452 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_19|], 21=[|v_#valid_20|]} [2021-11-03 05:03:09,458 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-03 05:03:09,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:03:09,460 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,460 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-11-03 05:03:09,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-11-03 05:03:09,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-11-03 05:03:09,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,477 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:03:09,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-11-03 05:03:09,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-11-03 05:03:09,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-03 05:03:09,527 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,531 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:03:09,532 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-11-03 05:03:09,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-11-03 05:03:09,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,540 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,541 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 05:03:09,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-11-03 05:03:09,542 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:294, output treesize:121 [2021-11-03 05:03:09,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:03:09,551 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.7 percent of original size [2021-11-03 05:03:09,553 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 121 [2021-11-03 05:03:09,556 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,559 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-11-03 05:03:09,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,615 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,623 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 326 [2021-11-03 05:03:09,628 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-11-03 05:03:09,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,651 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 355 [2021-11-03 05:03:09,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-03 05:03:09,723 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 05:03:09,724 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:03:09,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,727 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:03:09,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,731 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-11-03 05:03:09,737 INFO L180 QuantifierPusher]: treesize reduction 48, result has 53.4 percent of original size [2021-11-03 05:03:09,738 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:03:09,742 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-03 05:03:09,743 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-03 05:03:09,746 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-11-03 05:03:09,750 INFO L180 QuantifierPusher]: treesize reduction 4, result has 92.9 percent of original size [2021-11-03 05:03:09,752 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-11-03 05:03:09,758 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:03:09,760 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 05:03:09,760 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-03 05:03:10,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [429205833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:10,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:03:10,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 6] total 18 [2021-11-03 05:03:10,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273580647] [2021-11-03 05:03:10,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 05:03:10,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 05:03:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-03 05:03:10,311 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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) [2021-11-03 05:03:12,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:12,188 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-11-03 05:03:12,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:03:12,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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 17 [2021-11-03 05:03:12,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:12,190 INFO L225 Difference]: With dead ends: 95 [2021-11-03 05:03:12,190 INFO L226 Difference]: Without dead ends: 89 [2021-11-03 05:03:12,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-11-03 05:03:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-03 05:03:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2021-11-03 05:03:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-11-03 05:03:12,207 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 17 [2021-11-03 05:03:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:12,207 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-11-03 05:03:12,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 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) [2021-11-03 05:03:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-11-03 05:03:12,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:03:12,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:12,208 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:12,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:12,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-03 05:03:12,428 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:03:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:12,429 INFO L85 PathProgramCache]: Analyzing trace with hash -802787935, now seen corresponding path program 1 times [2021-11-03 05:03:12,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:12,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321427163] [2021-11-03 05:03:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:12,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:12,444 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:03:12,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494261421] [2021-11-03 05:03:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:12,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:12,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:03:12,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 05:03:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:03:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:03:12,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:03:29,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:03:29,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321427163] [2021-11-03 05:03:29,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:03:29,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494261421] [2021-11-03 05:03:29,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494261421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:29,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:29,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:03:29,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057662464] [2021-11-03 05:03:29,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:03:29,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:03:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:03:29,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-11-03 05:03:29,386 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:37,859 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-11-03 05:03:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:03:37,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2021-11-03 05:03:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:37,860 INFO L225 Difference]: With dead ends: 89 [2021-11-03 05:03:37,860 INFO L226 Difference]: Without dead ends: 83 [2021-11-03 05:03:37,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:03:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-03 05:03:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-11-03 05:03:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.173913043478261) internal successors, (81), 77 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) [2021-11-03 05:03:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-11-03 05:03:37,869 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 18 [2021-11-03 05:03:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:37,869 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-11-03 05:03:37,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-11-03 05:03:37,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-03 05:03:37,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:37,871 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:37,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:38,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-03 05:03:38,076 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-03 05:03:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 674196339, now seen corresponding path program 1 times [2021-11-03 05:03:38,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:03:38,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110817439] [2021-11-03 05:03:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:38,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:03:38,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:03:38,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001660863] [2021-11-03 05:03:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:38,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:03:38,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:03:38,087 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:03:38,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c61b9d7-e578-4148-a035-2f89d7d9ec61/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process