./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P --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 42b59db67e4ff104bf70a3f31bfda20f06e9930727bb99d5ddebd47ecfc54cb7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:46:13,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:46:13,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:46:13,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:46:13,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:46:13,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:46:13,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:46:13,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:46:13,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:46:13,295 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:46:13,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:46:13,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:46:13,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:46:13,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:46:13,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:46:13,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:46:13,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:46:13,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:46:13,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:46:13,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:46:13,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:46:13,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:46:13,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:46:13,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:46:13,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:46:13,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:46:13,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:46:13,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:46:13,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:46:13,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:46:13,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:46:13,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:46:13,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:46:13,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:46:13,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:46:13,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:46:13,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:46:13,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:46:13,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:46:13,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:46:13,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:46:13,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:46:13,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:46:13,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:46:13,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:46:13,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:46:13,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:46:13,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:46:13,407 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:46:13,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:46:13,408 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:46:13,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:46:13,408 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:46:13,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:46:13,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:46:13,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:46:13,409 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:46:13,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:46:13,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:46:13,410 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:46:13,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:46:13,411 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:46:13,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:46:13,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:46:13,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:46:13,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:46:13,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:46:13,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:46:13,413 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:46:13,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:46:13,413 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:46:13,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:46:13,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:46:13,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:46:13,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:46:13,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:46:13,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:46:13,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:46:13,415 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:46:13,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:46:13,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:46:13,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:46:13,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:46:13,416 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_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42b59db67e4ff104bf70a3f31bfda20f06e9930727bb99d5ddebd47ecfc54cb7 [2021-11-20 23:46:13,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:46:13,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:46:13,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:46:13,713 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:46:13,714 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:46:13,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/s2if.c [2021-11-20 23:46:13,776 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/data/cd261c215/c86bfa8b885f4e82915af4e55dd809b8/FLAG16d617dba [2021-11-20 23:46:14,239 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:46:14,240 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/sv-benchmarks/c/array-fpi/s2if.c [2021-11-20 23:46:14,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/data/cd261c215/c86bfa8b885f4e82915af4e55dd809b8/FLAG16d617dba [2021-11-20 23:46:14,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/data/cd261c215/c86bfa8b885f4e82915af4e55dd809b8 [2021-11-20 23:46:14,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:46:14,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:46:14,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:46:14,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:46:14,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:46:14,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58be09ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14, skipping insertion in model container [2021-11-20 23:46:14,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:46:14,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:46:14,797 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/sv-benchmarks/c/array-fpi/s2if.c[587,600] [2021-11-20 23:46:14,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:46:14,837 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:46:14,849 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/sv-benchmarks/c/array-fpi/s2if.c[587,600] [2021-11-20 23:46:14,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:46:14,880 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:46:14,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14 WrapperNode [2021-11-20 23:46:14,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:46:14,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:46:14,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:46:14,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:46:14,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,914 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-11-20 23:46:14,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:46:14,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:46:14,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:46:14,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:46:14,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:46:14,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:46:14,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:46:14,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:46:14,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (1/1) ... [2021-11-20 23:46:14,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:46:14,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:14,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:46:14,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:46:15,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:46:15,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:46:15,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:46:15,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:46:15,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:46:15,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:46:15,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:46:15,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:46:15,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:46:15,104 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:46:15,105 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:46:15,273 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:46:15,329 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:46:15,329 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:46:15,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:46:15 BoogieIcfgContainer [2021-11-20 23:46:15,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:46:15,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:46:15,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:46:15,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:46:15,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:46:14" (1/3) ... [2021-11-20 23:46:15,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347ac845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:46:15, skipping insertion in model container [2021-11-20 23:46:15,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:46:14" (2/3) ... [2021-11-20 23:46:15,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347ac845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:46:15, skipping insertion in model container [2021-11-20 23:46:15,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:46:15" (3/3) ... [2021-11-20 23:46:15,342 INFO L111 eAbstractionObserver]: Analyzing ICFG s2if.c [2021-11-20 23:46:15,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:46:15,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:46:15,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:46:15,468 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 [2021-11-20 23:46:15,469 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:46:15,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:46:15,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:15,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:46:15,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:15,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:15,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-11-20 23:46:15,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:15,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849672409] [2021-11-20 23:46:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:15,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:15,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849672409] [2021-11-20 23:46:15,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849672409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:15,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:15,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:46:15,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055125458] [2021-11-20 23:46:15,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:15,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:46:15,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:46:15,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:46:15,920 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-20 23:46:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:15,969 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-20 23:46:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:46:15,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-11-20 23:46:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:15,981 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:46:15,982 INFO L226 Difference]: Without dead ends: 8 [2021-11-20 23:46:15,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:46:15,990 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:15,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:46:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-20 23:46:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-20 23:46:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2021-11-20 23:46:16,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-20 23:46:16,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-20 23:46:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:16,026 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-20 23:46:16,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-20 23:46:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-20 23:46:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:46:16,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:16,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:16,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:46:16,028 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:16,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-11-20 23:46:16,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:16,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450455348] [2021-11-20 23:46:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:16,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:46:16,175 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450455348] [2021-11-20 23:46:16,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450455348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:46:16,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:46:16,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:46:16,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046893355] [2021-11-20 23:46:16,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:46:16,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:46:16,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:16,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:46:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:16,180 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:16,218 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-20 23:46:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:46:16,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:46:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:16,220 INFO L225 Difference]: With dead ends: 12 [2021-11-20 23:46:16,220 INFO L226 Difference]: Without dead ends: 9 [2021-11-20 23:46:16,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:46:16,223 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:16,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:46:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-20 23:46:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-20 23:46:16,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) 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) [2021-11-20 23:46:16,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-20 23:46:16,228 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-20 23:46:16,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:16,228 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-20 23:46:16,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-20 23:46:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:46:16,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:16,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:16,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:46:16,239 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:16,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-11-20 23:46:16,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:16,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993669732] [2021-11-20 23:46:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:16,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:16,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:16,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267318667] [2021-11-20 23:46:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:16,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:16,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:16,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:16,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:46:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:16,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:46:16,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:16,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:46:16,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:46:16,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 23:46:16,768 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-20 23:46:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-20 23:46:16,957 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:46:16,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 40 [2021-11-20 23:46:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:17,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:17,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993669732] [2021-11-20 23:46:17,416 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267318667] [2021-11-20 23:46:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267318667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:17,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1420437763] [2021-11-20 23:46:17,436 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:46:17,436 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:17,440 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:17,445 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:17,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,639 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:46:17,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:46:17,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,810 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:46:17,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:46:17,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:17,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:46:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 29 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-20 23:46:18,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:18,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:18,573 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-20 23:46:18,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 387 treesize of output 376 [2021-11-20 23:46:19,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:46:19,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:19,302 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:46:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:46:19,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:19,361 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:46:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:46:19,707 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:19,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:46:19,899 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:19,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:46:20,239 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:20,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:20,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:20,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-20 23:46:20,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635356946] [2021-11-20 23:46:20,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:20,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:46:20,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:46:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:46:20,532 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:20,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:20,585 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-20 23:46:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:46:20,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:46:20,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:20,586 INFO L225 Difference]: With dead ends: 15 [2021-11-20 23:46:20,586 INFO L226 Difference]: Without dead ends: 12 [2021-11-20 23:46:20,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:46:20,588 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:20,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-20 23:46:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-20 23:46:20,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-20 23:46:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-20 23:46:20,593 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-20 23:46:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:20,593 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-20 23:46:20,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-20 23:46:20,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:46:20,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:20,594 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:20,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:20,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:20,808 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:20,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2021-11-20 23:46:20,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:20,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788837245] [2021-11-20 23:46:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:20,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:20,824 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:20,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931745973] [2021-11-20 23:46:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:46:20,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:20,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:20,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:20,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:46:20,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 23:46:20,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:46:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:46:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:20,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:20,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:20,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788837245] [2021-11-20 23:46:20,978 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:20,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931745973] [2021-11-20 23:46:20,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931745973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581016009] [2021-11-20 23:46:20,983 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:46:20,983 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:20,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:20,984 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:20,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:21,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,178 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:46:21,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:46:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:46:21,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-20 23:46:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-20 23:46:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:21,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:21,786 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-20 23:46:21,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 385 treesize of output 380 [2021-11-20 23:46:22,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:46:22,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:22,483 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:46:22,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:46:22,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:22,703 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:46:22,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:46:22,872 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:22,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:46:23,000 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:23,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:46:23,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:23,822 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:23,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:23,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 23:46:23,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656859773] [2021-11-20 23:46:23,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:23,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:46:23,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:46:23,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:46:23,824 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:23,896 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-20 23:46:23,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:46:23,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-11-20 23:46:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:23,898 INFO L225 Difference]: With dead ends: 20 [2021-11-20 23:46:23,898 INFO L226 Difference]: Without dead ends: 14 [2021-11-20 23:46:23,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:46:23,900 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:23,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:46:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-20 23:46:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-11-20 23:46:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-20 23:46:23,903 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-11-20 23:46:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:23,903 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-20 23:46:23,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-20 23:46:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:46:23,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:23,904 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:23,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:24,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:24,105 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2021-11-20 23:46:24,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:24,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755061432] [2021-11-20 23:46:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:24,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:24,123 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:24,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321058567] [2021-11-20 23:46:24,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:46:24,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:24,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:24,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:24,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:46:24,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:46:24,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:46:24,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:46:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:24,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:24,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:24,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755061432] [2021-11-20 23:46:24,273 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:24,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321058567] [2021-11-20 23:46:24,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321058567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:24,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614073308] [2021-11-20 23:46:24,276 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:46:24,276 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:24,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:24,277 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:24,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:24,396 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:46:24,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-20 23:46:24,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:24,505 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:46:24,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:46:24,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:24,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:24,656 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:46:24,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:46:24,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:46:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:24,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-20 23:46:24,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:46:25,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:25,095 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:46:25,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:46:25,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:25,376 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:46:25,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:46:25,522 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:25,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:46:25,604 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:25,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:46:26,097 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:26,300 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:26,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:26,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 23:46:26,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205175926] [2021-11-20 23:46:26,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:26,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:46:26,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:26,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:46:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:46:26,302 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:26,391 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-20 23:46:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 23:46:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-11-20 23:46:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:26,392 INFO L225 Difference]: With dead ends: 14 [2021-11-20 23:46:26,392 INFO L226 Difference]: Without dead ends: 11 [2021-11-20 23:46:26,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-20 23:46:26,393 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:26,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-20 23:46:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-20 23:46:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-20 23:46:26,397 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-20 23:46:26,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:26,398 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-20 23:46:26,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-20 23:46:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:46:26,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:26,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:26,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:26,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:26,614 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:26,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:26,614 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2021-11-20 23:46:26,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:26,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645708266] [2021-11-20 23:46:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:26,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:26,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:26,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022344877] [2021-11-20 23:46:26,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:46:26,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:26,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:26,627 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:26,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:46:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:26,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 23:46:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:26,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:46:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:46:26,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-20 23:46:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:26,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:46:26,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:26,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-20 23:46:26,905 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-20 23:46:26,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 37 [2021-11-20 23:46:26,983 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:46:26,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 45 [2021-11-20 23:46:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:27,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:34,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:34,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645708266] [2021-11-20 23:46:34,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:34,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022344877] [2021-11-20 23:46:34,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022344877] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:34,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628449441] [2021-11-20 23:46:34,304 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:46:34,305 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:34,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:34,305 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:34,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:34,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,491 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:46:34,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:46:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-20 23:46:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:46:34,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-20 23:46:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:34,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:34,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:35,056 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-20 23:46:35,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-20 23:46:35,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:46:35,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:35,730 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:46:35,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:46:35,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:35,894 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:46:35,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:46:36,103 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:36,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:46:36,585 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:36,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:46:36,895 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:37,323 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:37,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:37,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-20 23:46:37,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322981452] [2021-11-20 23:46:37,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:37,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:46:37,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:46:37,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:46:37,325 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:39,993 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-20 23:46:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:46:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:46:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:39,994 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:46:39,994 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 23:46:39,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:46:39,995 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:39,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2021-11-20 23:46:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 23:46:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-20 23:46:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-11-20 23:46:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-20 23:46:40,001 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-20 23:46:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:40,001 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-20 23:46:40,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-20 23:46:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:46:40,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:40,003 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:40,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:40,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 23:46:40,225 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:40,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1260736258, now seen corresponding path program 5 times [2021-11-20 23:46:40,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:40,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754654241] [2021-11-20 23:46:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:40,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:40,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:40,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416468845] [2021-11-20 23:46:40,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:46:40,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:40,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:40,248 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:40,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:46:40,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:46:40,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:46:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:46:40,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:40,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:40,456 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754654241] [2021-11-20 23:46:40,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416468845] [2021-11-20 23:46:40,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416468845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:40,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436412528] [2021-11-20 23:46:40,459 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:46:40,460 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:40,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:40,460 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:40,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,632 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:46:40,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:46:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:46:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-20 23:46:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-20 23:46:41,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:41,223 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-20 23:46:41,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 383 treesize of output 372 [2021-11-20 23:46:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:46:41,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:41,788 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-20 23:46:41,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-20 23:46:41,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:41,982 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-20 23:46:41,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-20 23:46:42,097 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:42,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:46:42,160 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:42,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:46:43,155 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:43,345 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:43,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:43,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-20 23:46:43,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929752622] [2021-11-20 23:46:43,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:43,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 23:46:43,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 23:46:43,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:46:43,348 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-11-20 23:46:43,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:43,458 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-20 23:46:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:46:43,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 11 [2021-11-20 23:46:43,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:43,459 INFO L225 Difference]: With dead ends: 23 [2021-11-20 23:46:43,460 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 23:46:43,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:46:43,461 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:43,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:46:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 23:46:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-11-20 23:46:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-20 23:46:43,469 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-11-20 23:46:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:43,469 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-20 23:46:43,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-11-20 23:46:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-20 23:46:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:46:43,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:43,472 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:43,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:43,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 23:46:43,675 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:43,676 INFO L85 PathProgramCache]: Analyzing trace with hash 973526812, now seen corresponding path program 6 times [2021-11-20 23:46:43,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:43,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095138570] [2021-11-20 23:46:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:43,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:43,683 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:43,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619064359] [2021-11-20 23:46:43,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:46:43,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:43,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:43,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:43,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:46:43,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:46:43,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:46:43,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 23:46:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:43,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:46:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:43,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:46:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095138570] [2021-11-20 23:46:43,880 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:46:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619064359] [2021-11-20 23:46:43,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619064359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:46:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1214914297] [2021-11-20 23:46:43,882 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:46:43,882 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:46:43,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:46:43,882 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:46:43,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:46:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:43,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:43,993 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:46:43,993 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 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:46:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,082 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:46:44,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:46:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:46:44,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-20 23:46:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:44,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:44,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:44,599 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-20 23:46:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-20 23:46:45,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:46:45,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:45,300 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-20 23:46:45,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-20 23:46:45,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:45,509 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-20 23:46:45,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-20 23:46:45,622 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:45,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:46:45,835 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:46:45,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:46:46,090 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:46:46,288 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:46:46,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:46:46,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 23:46:46,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519074874] [2021-11-20 23:46:46,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:46:46,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:46:46,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:46:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:46:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:46:46,290 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-11-20 23:46:46,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:46:46,393 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-20 23:46:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:46:46,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 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 11 [2021-11-20 23:46:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:46:46,394 INFO L225 Difference]: With dead ends: 16 [2021-11-20 23:46:46,394 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 23:46:46,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:46:46,395 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:46:46,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:46:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 23:46:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-20 23:46:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:46:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-20 23:46:46,400 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-20 23:46:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:46:46,400 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-20 23:46:46,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-11-20 23:46:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-20 23:46:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 23:46:46,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:46:46,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-20 23:46:46,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 23:46:46,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:46,602 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:46:46,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:46:46,602 INFO L85 PathProgramCache]: Analyzing trace with hash 114668683, now seen corresponding path program 7 times [2021-11-20 23:46:46,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:46:46,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304855321] [2021-11-20 23:46:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:46:46,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:46:46,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:46:46,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398231158] [2021-11-20 23:46:46,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:46:46,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:46:46,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:46:46,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:46:46,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:46:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:46:46,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 23:46:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:46:46,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:46:46,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:46:46,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-20 23:46:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-20 23:46:46,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 23:46:46,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-20 23:46:46,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:46:46,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:46,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 115 [2021-11-20 23:46:47,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:46:47,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 52 [2021-11-20 23:46:47,112 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-20 23:46:47,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 49 [2021-11-20 23:46:47,181 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 23:46:47,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 49 [2021-11-20 23:46:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:46:47,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:47:30,371 WARN L227 SmtUtils]: Spent 21.53s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:47:46,909 WARN L227 SmtUtils]: Spent 9.04s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:48:28,300 WARN L227 SmtUtils]: Spent 15.24s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:49:15,792 WARN L227 SmtUtils]: Spent 27.87s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:50:28,414 WARN L227 SmtUtils]: Spent 37.27s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:50:28,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:50:28,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:50:28,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304855321] [2021-11-20 23:50:28,523 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:50:28,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398231158] [2021-11-20 23:50:28,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398231158] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:50:28,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905477996] [2021-11-20 23:50:28,525 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:50:28,525 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:50:28,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:50:28,526 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:50:28,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:50:28,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:28,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:28,654 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:50:28,655 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 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:50:28,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:28,711 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:50:28,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-20 23:50:28,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:28,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:28,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:28,855 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:50:28,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:50:28,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:50:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:50:28,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-20 23:50:29,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:50:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,235 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:50:29,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:50:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:50:29,305 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:50:29,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:50:29,764 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:50:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:50:30,330 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:50:30,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:50:30,571 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:50:37,695 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:50:37,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:50:37,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-20 23:50:37,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902701811] [2021-11-20 23:50:37,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:50:37,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 23:50:37,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:50:37,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 23:50:37,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=434, Unknown=10, NotChecked=0, Total=506 [2021-11-20 23:50:37,697 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:20,682 WARN L227 SmtUtils]: Spent 27.28s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:51:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:20,690 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-20 23:51:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:51:20,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 23:51:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:20,691 INFO L225 Difference]: With dead ends: 21 [2021-11-20 23:51:20,691 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 23:51:20,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 205.2s TimeCoverageRelationStatistics Valid=73, Invalid=515, Unknown=12, NotChecked=0, Total=600 [2021-11-20 23:51:20,692 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:20,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 2 Unchecked, 2.8s Time] [2021-11-20 23:51:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 23:51:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-20 23:51:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-20 23:51:20,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-20 23:51:20,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:20,699 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-20 23:51:20,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:20,700 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-20 23:51:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:51:20,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:20,700 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:20,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 23:51:20,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:20,906 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:20,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:20,907 INFO L85 PathProgramCache]: Analyzing trace with hash -740129540, now seen corresponding path program 8 times [2021-11-20 23:51:20,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:20,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188881924] [2021-11-20 23:51:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:20,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:20,918 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:51:20,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284418698] [2021-11-20 23:51:20,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:51:20,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:20,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:51:20,920 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:51:20,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:51:21,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:51:21,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:51:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:51:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:51:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:21,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:51:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:21,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:21,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188881924] [2021-11-20 23:51:21,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:51:21,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284418698] [2021-11-20 23:51:21,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284418698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:51:21,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1634152805] [2021-11-20 23:51:21,167 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:51:21,167 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:51:21,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:51:21,168 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:51:21,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:51:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,296 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:51:21,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:51:21,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-20 23:51:21,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-20 23:51:21,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-20 23:51:21,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:21,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:21,821 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-20 23:51:21,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-20 23:51:22,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:51:22,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:22,439 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:51:22,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:51:22,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:22,602 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:51:22,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:51:22,765 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:51:22,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:51:23,025 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:51:23,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:51:23,277 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:51:23,482 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:51:23,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:51:23,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-20 23:51:23,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387301021] [2021-11-20 23:51:23,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:51:23,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:51:23,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:51:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-20 23:51:23,484 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:23,612 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-20 23:51:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:51:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 23:51:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:23,613 INFO L225 Difference]: With dead ends: 26 [2021-11-20 23:51:23,613 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 23:51:23,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:51:23,615 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:23,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:51:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 23:51:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-20 23:51:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-11-20 23:51:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-20 23:51:23,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2021-11-20 23:51:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:23,622 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-20 23:51:23,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-20 23:51:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 23:51:23,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:23,623 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:23,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 23:51:23,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 23:51:23,833 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash -197451106, now seen corresponding path program 9 times [2021-11-20 23:51:23,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:23,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40424421] [2021-11-20 23:51:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:23,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:23,841 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:51:23,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307787075] [2021-11-20 23:51:23,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:51:23,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:23,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:51:23,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:51:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:51:23,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:51:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:51:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 23:51:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:51:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:24,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:51:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:24,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:51:24,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40424421] [2021-11-20 23:51:24,100 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:51:24,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307787075] [2021-11-20 23:51:24,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307787075] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:51:24,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [124976616] [2021-11-20 23:51:24,103 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:51:24,103 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:51:24,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:51:24,104 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:51:24,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:51:24,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:24,202 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:51:24,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-20 23:51:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:24,359 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-20 23:51:24,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-20 23:51:24,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:24,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:24,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:24,523 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-20 23:51:24,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-20 23:51:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:51:24,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:24,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-20 23:51:24,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 23:51:24,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:25,041 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:51:25,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-20 23:51:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:25,287 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-20 23:51:25,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-20 23:51:25,413 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:51:25,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-20 23:51:25,487 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-20 23:51:25,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-20 23:51:26,342 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:51:26,539 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:51:26,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:51:26,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 23:51:26,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885202319] [2021-11-20 23:51:26,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:51:26,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 23:51:26,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:51:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 23:51:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:51:26,541 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:26,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:51:26,679 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-20 23:51:26,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:51:26,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 23:51:26,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:51:26,681 INFO L225 Difference]: With dead ends: 18 [2021-11-20 23:51:26,681 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 23:51:26,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-20 23:51:26,682 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:51:26,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:51:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 23:51:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-20 23:51:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-20 23:51:26,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-11-20 23:51:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:51:26,690 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-20 23:51:26,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:51:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-20 23:51:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:51:26,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:51:26,690 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-20 23:51:26,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 23:51:26,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 23:51:26,891 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:51:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:51:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1825908407, now seen corresponding path program 10 times [2021-11-20 23:51:26,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:51:26,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4556678] [2021-11-20 23:51:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:51:26,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:51:26,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:51:26,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592078913] [2021-11-20 23:51:26,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:51:26,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:51:26,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:51:26,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:51:26,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79773285-249c-43d0-8081-505e7e88a082/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 23:51:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:51:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 23:51:26,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:51:26,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:51:26,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 23:51:26,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 23:51:27,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-20 23:51:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2021-11-20 23:51:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-20 23:51:27,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 140 [2021-11-20 23:51:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 50 [2021-11-20 23:51:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:27,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 146 [2021-11-20 23:51:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 45 [2021-11-20 23:51:27,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:51:27,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 154 [2021-11-20 23:51:27,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:51:27,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 75 [2021-11-20 23:51:27,833 INFO L354 Elim1Store]: treesize reduction 152, result has 16.0 percent of original size [2021-11-20 23:51:27,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 78 treesize of output 62 [2021-11-20 23:51:27,920 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-20 23:51:27,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 51 [2021-11-20 23:51:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:51:27,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:52:04,218 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse12 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse24 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse24))) (.cse4 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse13 (+ .cse2 .cse4)) (.cse19 (* .cse2 .cse4)) (.cse23 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse24 4))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse19)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23)) (.cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse24)) (.cse9 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse13)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse23))) (let ((.cse8 (= 2 .cse9)) (.cse20 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse4 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14)) (.cse7 (= .cse2 2)) (.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14)) (.cse16 (= 2 .cse5))) (let ((.cse0 (not .cse16)) (.cse6 (= 2 .cse3)) (.cse15 (not .cse7)) (.cse21 (= 2 .cse20)) (.cse1 (* 2 c_~N~0)) (.cse22 (not .cse8))) (and (or .cse0 (= .cse1 (+ (* .cse2 .cse3 .cse4) (* .cse5 .cse3))) .cse6 .cse7) (or .cse8 (let ((.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse9 .cse13))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (let ((.cse11 (= .cse10 2))) (and (or (= .cse1 (+ (* .cse9 .cse4 .cse10) (* .cse2 .cse9 .cse10))) .cse11) (or (= .cse1 (+ (* .cse2 .cse9) .cse10 (* .cse9 .cse4))) (not .cse11))))) .cse15) (or .cse16 .cse7 (let ((.cse17 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse5 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (let ((.cse18 (= 2 .cse17))) (and (or (= .cse1 (+ .cse17 (* .cse2 .cse5 .cse4))) (not .cse18)) (or (= .cse1 (* .cse17 .cse2 .cse5 .cse4)) .cse18))))) (or .cse0 (not .cse6) (= .cse1 (+ .cse19 .cse3 .cse5)) .cse7) (or (= .cse1 (+ (* .cse2 .cse20) (* .cse20 .cse4) (* .cse20 .cse9))) .cse21 .cse15 .cse22) (or .cse15 (not .cse21) (= .cse1 (+ .cse2 .cse20 .cse4 .cse9)) .cse22)))))))) is different from false