./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/base_case.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0 --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 f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 20:29:03,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:29:03,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:29:03,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:29:03,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:29:03,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:29:03,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:29:03,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:29:03,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:29:03,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:29:03,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:29:03,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:29:03,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:29:03,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:29:03,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:29:03,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:29:03,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:29:03,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:29:03,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:29:03,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:29:03,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:29:03,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:29:03,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:29:03,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:29:03,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:29:03,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:29:03,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:29:03,320 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:29:03,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:29:03,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:29:03,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:29:03,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:29:03,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:29:03,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:29:03,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:29:03,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:29:03,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:29:03,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:29:03,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:29:03,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:29:03,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:29:03,333 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:29:03,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:29:03,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:29:03,372 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:29:03,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:29:03,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:29:03,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:29:03,374 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:29:03,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:29:03,374 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:29:03,375 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:29:03,376 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:29:03,376 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:29:03,376 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:29:03,376 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:29:03,376 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:29:03,377 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:29:03,377 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:29:03,377 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:29:03,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:29:03,378 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:29:03,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:29:03,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:29:03,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:29:03,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:29:03,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:29:03,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:29:03,381 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:29:03,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:29:03,381 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:29:03,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:29:03,382 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:29:03,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:29:03,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:29:03,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:29:03,383 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:29:03,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:29:03,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:29:03,383 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:29:03,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:29:03,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:29:03,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:29:03,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2022-11-16 20:29:03,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:29:03,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:29:03,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:29:03,698 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:29:03,699 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:29:03,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-lopstr16/base_case.i [2022-11-16 20:29:03,784 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data/d0ec47325/3bab0b9a80f34b74887aa88dce92ac8d/FLAG2bd63e587 [2022-11-16 20:29:04,321 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:29:04,323 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/sv-benchmarks/c/array-lopstr16/base_case.i [2022-11-16 20:29:04,331 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data/d0ec47325/3bab0b9a80f34b74887aa88dce92ac8d/FLAG2bd63e587 [2022-11-16 20:29:04,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data/d0ec47325/3bab0b9a80f34b74887aa88dce92ac8d [2022-11-16 20:29:04,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:29:04,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:29:04,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:29:04,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:29:04,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:29:04,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:04,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67116ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04, skipping insertion in model container [2022-11-16 20:29:04,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:04,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:29:04,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:29:04,943 WARN L229 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_11046f7e-5f42-498d-97ac-5533c3fc8313/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-11-16 20:29:04,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:29:04,970 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:29:04,980 WARN L229 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_11046f7e-5f42-498d-97ac-5533c3fc8313/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-11-16 20:29:04,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:29:04,998 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:29:04,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04 WrapperNode [2022-11-16 20:29:04,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:29:05,000 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:29:05,000 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:29:05,000 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:29:05,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,047 INFO L138 Inliner]: procedures = 19, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-11-16 20:29:05,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:29:05,049 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:29:05,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:29:05,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:29:05,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,073 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:29:05,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:29:05,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:29:05,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:29:05,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (1/1) ... [2022-11-16 20:29:05,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:29:05,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:29:05,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:29:05,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:29:05,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 20:29:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:29:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:29:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 20:29:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:29:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:29:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:29:05,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:29:05,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:29:05,283 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:29:05,285 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:29:05,476 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:29:05,594 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:29:05,594 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 20:29:05,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:29:05 BoogieIcfgContainer [2022-11-16 20:29:05,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:29:05,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:29:05,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:29:05,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:29:05,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:29:04" (1/3) ... [2022-11-16 20:29:05,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b58279c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:29:05, skipping insertion in model container [2022-11-16 20:29:05,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:29:04" (2/3) ... [2022-11-16 20:29:05,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b58279c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:29:05, skipping insertion in model container [2022-11-16 20:29:05,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:29:05" (3/3) ... [2022-11-16 20:29:05,616 INFO L112 eAbstractionObserver]: Analyzing ICFG base_case.i [2022-11-16 20:29:05,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:29:05,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:29:05,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:29:05,717 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@294c0c54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:29:05,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:29:05,721 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) [2022-11-16 20:29:05,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 20:29:05,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:29:05,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 20:29:05,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:29:05,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:29:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1687833653, now seen corresponding path program 1 times [2022-11-16 20:29:05,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:29:05,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875808049] [2022-11-16 20:29:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:29:05,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:29:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:29:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:06,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:29:06,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875808049] [2022-11-16 20:29:06,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875808049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:29:06,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:29:06,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:29:06,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208963258] [2022-11-16 20:29:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:29:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:29:06,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:29:06,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:29:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:29:06,044 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), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:29:06,094 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2022-11-16 20:29:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:29:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 20:29:06,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:29:06,105 INFO L225 Difference]: With dead ends: 26 [2022-11-16 20:29:06,106 INFO L226 Difference]: Without dead ends: 17 [2022-11-16 20:29:06,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:29:06,112 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 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 [2022-11-16 20:29:06,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:29:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-16 20:29:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2022-11-16 20:29:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 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) [2022-11-16 20:29:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-16 20:29:06,148 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-16 20:29:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:29:06,148 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-16 20:29:06,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:29:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-16 20:29:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 20:29:06,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:29:06,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:29:06,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:29:06,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:29:06,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:29:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash -667887845, now seen corresponding path program 1 times [2022-11-16 20:29:06,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:29:06,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662162974] [2022-11-16 20:29:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:29:06,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:29:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:29:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:06,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:29:06,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662162974] [2022-11-16 20:29:06,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662162974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:29:06,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697049413] [2022-11-16 20:29:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:29:06,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:29:06,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:29:06,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:29:06,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:29:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:29:06,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:29:06,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:06,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:06,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697049413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330006711] [2022-11-16 20:29:06,560 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:29:06,561 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:29:06,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:29:06,572 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:29:06,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:29:06,670 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 6 [2022-11-16 20:29:06,685 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 6 [2022-11-16 20:29:06,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:06,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 162 [2022-11-16 20:29:06,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:06,976 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 130 [2022-11-16 20:29:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:07,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 136 [2022-11-16 20:29:07,425 INFO L321 Elim1Store]: treesize reduction 234, result has 17.6 percent of original size [2022-11-16 20:29:07,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 114 treesize of output 170 [2022-11-16 20:29:07,568 INFO L321 Elim1Store]: treesize reduction 68, result has 11.7 percent of original size [2022-11-16 20:29:07,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 125 [2022-11-16 20:29:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:07,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 17 [2022-11-16 20:29:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:07,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 27 treesize of output 76 [2022-11-16 20:29:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-11-16 20:29:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-11-16 20:29:08,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 39 [2022-11-16 20:29:08,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 39 [2022-11-16 20:29:08,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 903 treesize of output 855 [2022-11-16 20:29:08,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 912 treesize of output 898 [2022-11-16 20:29:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 974 treesize of output 932 [2022-11-16 20:29:08,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 917 treesize of output 898 [2022-11-16 20:29:08,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:08,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 875 treesize of output 856 [2022-11-16 20:29:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-16 20:29:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-16 20:29:09,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-16 20:29:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-16 20:29:09,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-16 20:29:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:09,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 200 [2022-11-16 20:29:09,656 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:29:09,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 142 [2022-11-16 20:29:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 124 [2022-11-16 20:29:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:09,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 128 [2022-11-16 20:29:09,885 INFO L321 Elim1Store]: treesize reduction 48, result has 46.1 percent of original size [2022-11-16 20:29:09,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 186 [2022-11-16 20:29:09,935 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-16 20:29:09,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 148 [2022-11-16 20:29:10,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 7 [2022-11-16 20:29:10,222 INFO L321 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2022-11-16 20:29:10,223 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 20:29:10,360 INFO L321 Elim1Store]: treesize reduction 30, result has 47.4 percent of original size [2022-11-16 20:29:10,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 331 [2022-11-16 20:29:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:10,446 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-11-16 20:29:10,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 30 treesize of output 59 [2022-11-16 20:29:10,546 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-16 20:29:10,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 153 [2022-11-16 20:29:10,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:10,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:29:10,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 47 treesize of output 62 [2022-11-16 20:29:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:10,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-16 20:29:10,661 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-11-16 20:29:10,661 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 446 treesize of output 435 [2022-11-16 20:29:10,802 INFO L321 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2022-11-16 20:29:10,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-11-16 20:29:10,916 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-16 20:29:10,916 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 94 treesize of output 71 [2022-11-16 20:29:10,969 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:29:11,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s2~0#1.base|) (+ |ULTIMATE.start_main_~s2~0#1.offset| 4))) (= |ULTIMATE.start_main_~s2~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem9#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s2~0#1.base|) (+ |ULTIMATE.start_main_~s2~0#1.offset| 4))) (= |ULTIMATE.start_main_~s2~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= (ite (or (not (= |ULTIMATE.start_main_#t~mem9#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem9#1.offset| 0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:29:11,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:29:11,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:29:11,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 20:29:11,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392593287] [2022-11-16 20:29:11,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:29:11,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 20:29:11,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:29:11,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 20:29:11,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:29:11,150 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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) [2022-11-16 20:29:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:29:11,205 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-11-16 20:29:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:29:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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 7 [2022-11-16 20:29:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:29:11,206 INFO L225 Difference]: With dead ends: 42 [2022-11-16 20:29:11,206 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 20:29:11,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:29:11,207 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:29:11,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:29:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 20:29:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 13. [2022-11-16 20:29:11,211 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) [2022-11-16 20:29:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-16 20:29:11,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-11-16 20:29:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:29:11,212 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-16 20:29:11,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 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) [2022-11-16 20:29:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-16 20:29:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 20:29:11,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:29:11,213 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-16 20:29:11,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:29:11,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:29:11,424 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:29:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:29:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash 112986059, now seen corresponding path program 2 times [2022-11-16 20:29:11,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:29:11,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32115624] [2022-11-16 20:29:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:29:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:29:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:29:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:11,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:29:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32115624] [2022-11-16 20:29:11,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32115624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:29:11,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984221321] [2022-11-16 20:29:11,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:29:11,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:29:11,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:29:11,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:29:11,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:29:11,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:29:11,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:29:11,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:29:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:29:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:12,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:29:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:29:12,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984221321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:29:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630482774] [2022-11-16 20:29:12,072 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-16 20:29:12,072 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:29:12,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:29:12,073 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:29:12,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:29:12,084 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 6 [2022-11-16 20:29:12,090 INFO L350 Elim1Store]: Elim1 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 7 treesize of output 6 [2022-11-16 20:29:12,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 162 [2022-11-16 20:29:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,212 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 130 [2022-11-16 20:29:12,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 136 [2022-11-16 20:29:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,323 INFO L321 Elim1Store]: treesize reduction 68, result has 11.7 percent of original size [2022-11-16 20:29:12,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 140 [2022-11-16 20:29:12,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,468 INFO L321 Elim1Store]: treesize reduction 132, result has 14.8 percent of original size [2022-11-16 20:29:12,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 105 treesize of output 154 [2022-11-16 20:29:12,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 27 treesize of output 76 [2022-11-16 20:29:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 17 [2022-11-16 20:29:12,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:12,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 47 treesize of output 7 [2022-11-16 20:29:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:12,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 3 [2022-11-16 20:29:12,948 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-16 20:29:12,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 829 treesize of output 797 [2022-11-16 20:29:13,109 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-16 20:29:13,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 843 treesize of output 828 [2022-11-16 20:29:13,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:13,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 42 treesize of output 3 [2022-11-16 20:29:13,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:13,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 57 treesize of output 17 [2022-11-16 20:29:13,387 INFO L321 Elim1Store]: treesize reduction 93, result has 21.8 percent of original size [2022-11-16 20:29:13,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 858 treesize of output 999 [2022-11-16 20:29:13,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:13,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 11 [2022-11-16 20:29:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:14,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:14,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 14 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 834 treesize of output 6130 [2022-11-16 20:29:14,859 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:29:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:29:15,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:15,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:15,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:15,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:15,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:16,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:16,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:29:16,145 INFO L217 Elim1Store]: Index analysis took 593 ms [2022-11-16 20:29:16,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 42 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 17 new quantified variables, introduced 0 case distinctions, treesize of input 12447 treesize of output 285001 [2022-11-16 20:32:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:32:59,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:32:59,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 12 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 1114 treesize of output 4734 [2022-11-16 20:33:01,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:33:01,377 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 20:33:03,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:03,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 142 [2022-11-16 20:33:03,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:03,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 124 [2022-11-16 20:33:03,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:03,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 128 [2022-11-16 20:33:03,730 INFO L321 Elim1Store]: treesize reduction 48, result has 46.1 percent of original size [2022-11-16 20:33:03,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 186 [2022-11-16 20:33:03,775 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-16 20:33:03,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 148 [2022-11-16 20:33:04,011 INFO L321 Elim1Store]: treesize reduction 30, result has 47.4 percent of original size [2022-11-16 20:33:04,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 574 treesize of output 588 [2022-11-16 20:33:04,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:04,121 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-11-16 20:33:04,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 30 treesize of output 59 [2022-11-16 20:33:04,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 7 [2022-11-16 20:33:04,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 7 [2022-11-16 20:33:04,505 INFO L321 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2022-11-16 20:33:04,506 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 1452 treesize of output 1416 [2022-11-16 20:33:04,795 INFO L321 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2022-11-16 20:33:04,796 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 1501 treesize of output 1482 [2022-11-16 20:33:05,009 INFO L321 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2022-11-16 20:33:05,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1611 treesize of output 1474 [2022-11-16 20:33:05,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:05,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1304 treesize of output 1298 [2022-11-16 20:33:05,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:05,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1298 treesize of output 1292 [2022-11-16 20:33:05,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 9 [2022-11-16 20:33:05,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:05,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:05,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:33:05,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-16 20:33:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:05,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-16 20:33:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:05,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-16 20:33:05,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 9 [2022-11-16 20:33:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:05,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:33:05,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 25 treesize of output 12 [2022-11-16 20:33:05,461 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-16 20:33:05,461 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 28 treesize of output 11 [2022-11-16 20:33:05,509 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-16 20:33:05,510 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 28 treesize of output 11 [2022-11-16 20:33:05,595 INFO L321 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2022-11-16 20:33:05,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-11-16 20:33:05,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 41 treesize of output 7 [2022-11-16 20:33:05,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 20:33:05,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 58 [2022-11-16 20:33:05,871 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:33:05,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 86 [2022-11-16 20:33:05,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:33:06,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:33:06,122 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: no need to replace index at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructReplacementForSelectCase(DerPreprocessor.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructDerEnabler(DerPreprocessor.java:187) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:353) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:122) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-16 20:33:06,126 INFO L158 Benchmark]: Toolchain (without parser) took 241435.70ms. Allocated memory was 127.9MB in the beginning and 612.4MB in the end (delta: 484.4MB). Free memory was 88.1MB in the beginning and 222.3MB in the end (delta: -134.1MB). Peak memory consumption was 368.4MB. Max. memory is 16.1GB. [2022-11-16 20:33:06,126 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 127.9MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:33:06,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.13ms. Allocated memory is still 127.9MB. Free memory was 87.9MB in the beginning and 101.8MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 20:33:06,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.27ms. Allocated memory is still 127.9MB. Free memory was 101.8MB in the beginning and 100.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:33:06,127 INFO L158 Benchmark]: Boogie Preprocessor took 37.41ms. Allocated memory is still 127.9MB. Free memory was 100.1MB in the beginning and 98.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:33:06,127 INFO L158 Benchmark]: RCFGBuilder took 512.38ms. Allocated memory is still 127.9MB. Free memory was 98.7MB in the beginning and 83.4MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 20:33:06,127 INFO L158 Benchmark]: TraceAbstraction took 240524.29ms. Allocated memory was 127.9MB in the beginning and 612.4MB in the end (delta: 484.4MB). Free memory was 82.5MB in the beginning and 222.3MB in the end (delta: -139.8MB). Peak memory consumption was 364.7MB. Max. memory is 16.1GB. [2022-11-16 20:33:06,132 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 127.9MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 301.13ms. Allocated memory is still 127.9MB. Free memory was 87.9MB in the beginning and 101.8MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.27ms. Allocated memory is still 127.9MB. Free memory was 101.8MB in the beginning and 100.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.41ms. Allocated memory is still 127.9MB. Free memory was 100.1MB in the beginning and 98.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 512.38ms. Allocated memory is still 127.9MB. Free memory was 98.7MB in the beginning and 83.4MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 240524.29ms. Allocated memory was 127.9MB in the beginning and 612.4MB in the end (delta: 484.4MB). Free memory was 82.5MB in the beginning and 222.3MB in the end (delta: -139.8MB). Peak memory consumption was 364.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: no need to replace index de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: no need to replace index: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.constructReplacementForSelectCase(DerPreprocessor.java:333) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-16 20:33:06,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/base_case.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0 --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 f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 20:33:08,676 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:33:08,679 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:33:08,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:33:08,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:33:08,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:33:08,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:33:08,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:33:08,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:33:08,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:33:08,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:33:08,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:33:08,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:33:08,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:33:08,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:33:08,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:33:08,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:33:08,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:33:08,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:33:08,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:33:08,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:33:08,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:33:08,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:33:08,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:33:08,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:33:08,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:33:08,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:33:08,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:33:08,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:33:08,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:33:08,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:33:08,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:33:08,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:33:08,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:33:08,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:33:08,797 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:33:08,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:33:08,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:33:08,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:33:08,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:33:08,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:33:08,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-16 20:33:08,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:33:08,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:33:08,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:33:08,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:33:08,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:33:08,859 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:33:08,859 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:33:08,859 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:33:08,859 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:33:08,860 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:33:08,861 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:33:08,861 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:33:08,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:33:08,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:33:08,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:33:08,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:33:08,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:33:08,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:33:08,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:33:08,863 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 20:33:08,863 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 20:33:08,863 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 20:33:08,863 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:33:08,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:33:08,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:33:08,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:33:08,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:33:08,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 20:33:08,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:33:08,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:33:08,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:33:08,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:33:08,865 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:33:08,866 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 20:33:08,866 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 20:33:08,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:33:08,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:33:08,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 20:33:08,867 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f9dd43881ccf56b8e6da6d28cc61ed7f891fae597b16e121f5ac65378400d596 [2022-11-16 20:33:09,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:33:09,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:33:09,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:33:09,341 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:33:09,342 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:33:09,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-lopstr16/base_case.i [2022-11-16 20:33:09,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data/c14ffb8d4/c310581fd7bf4fdc972a1f8846f560b6/FLAG846b65464 [2022-11-16 20:33:10,073 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:33:10,074 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/sv-benchmarks/c/array-lopstr16/base_case.i [2022-11-16 20:33:10,083 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data/c14ffb8d4/c310581fd7bf4fdc972a1f8846f560b6/FLAG846b65464 [2022-11-16 20:33:10,414 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/data/c14ffb8d4/c310581fd7bf4fdc972a1f8846f560b6 [2022-11-16 20:33:10,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:33:10,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:33:10,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:33:10,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:33:10,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:33:10,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e7c42b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10, skipping insertion in model container [2022-11-16 20:33:10,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:33:10,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:33:10,604 WARN L229 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_11046f7e-5f42-498d-97ac-5533c3fc8313/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-11-16 20:33:10,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:33:10,634 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 20:33:10,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:33:10,641 WARN L229 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_11046f7e-5f42-498d-97ac-5533c3fc8313/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-11-16 20:33:10,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:33:10,670 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:33:10,697 WARN L229 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_11046f7e-5f42-498d-97ac-5533c3fc8313/sv-benchmarks/c/array-lopstr16/base_case.i[802,815] [2022-11-16 20:33:10,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:33:10,721 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:33:10,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10 WrapperNode [2022-11-16 20:33:10,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:33:10,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:33:10,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:33:10,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:33:10,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,736 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,756 INFO L138 Inliner]: procedures = 21, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 60 [2022-11-16 20:33:10,756 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:33:10,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:33:10,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:33:10,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:33:10,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,782 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,797 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:33:10,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:33:10,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:33:10,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:33:10,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (1/1) ... [2022-11-16 20:33:10,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:33:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:33:10,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:33:10,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:33:10,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 20:33:10,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:33:10,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 20:33:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 20:33:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:33:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 20:33:10,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:33:10,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:33:10,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 20:33:11,042 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:33:11,044 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:33:11,329 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:33:11,335 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:33:11,335 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 20:33:11,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:33:11 BoogieIcfgContainer [2022-11-16 20:33:11,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:33:11,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:33:11,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:33:11,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:33:11,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:33:10" (1/3) ... [2022-11-16 20:33:11,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cab460d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:33:11, skipping insertion in model container [2022-11-16 20:33:11,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:33:10" (2/3) ... [2022-11-16 20:33:11,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cab460d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:33:11, skipping insertion in model container [2022-11-16 20:33:11,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:33:11" (3/3) ... [2022-11-16 20:33:11,380 INFO L112 eAbstractionObserver]: Analyzing ICFG base_case.i [2022-11-16 20:33:11,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:33:11,405 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:33:11,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:33:11,502 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@381bb6a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:33:11,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:33:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 20:33:11,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:33:11,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:33:11,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:33:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:33:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash 590963434, now seen corresponding path program 1 times [2022-11-16 20:33:11,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:33:11,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474383653] [2022-11-16 20:33:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:33:11,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:33:11,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:33:11,556 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:33:11,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 20:33:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:33:11,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 20:33:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:11,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:33:11,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:33:11,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474383653] [2022-11-16 20:33:11,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474383653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:33:11,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:33:11,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 20:33:11,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467600381] [2022-11-16 20:33:11,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:33:11,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 20:33:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:33:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 20:33:11,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:33:11,746 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:33:11,769 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2022-11-16 20:33:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 20:33:11,772 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 20:33:11,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:33:11,789 INFO L225 Difference]: With dead ends: 30 [2022-11-16 20:33:11,789 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 20:33:11,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 20:33:11,797 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:33:11,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:33:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 20:33:11,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-16 20:33:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2022-11-16 20:33:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-16 20:33:11,842 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-11-16 20:33:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:33:11,844 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-16 20:33:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-16 20:33:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 20:33:11,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:33:11,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:33:11,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:33:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:33:12,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:33:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:33:12,061 INFO L85 PathProgramCache]: Analyzing trace with hash 218784471, now seen corresponding path program 1 times [2022-11-16 20:33:12,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:33:12,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948629976] [2022-11-16 20:33:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:33:12,062 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:33:12,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:33:12,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:33:12,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 20:33:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:33:12,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:33:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:12,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:33:12,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:33:12,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948629976] [2022-11-16 20:33:12,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948629976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:33:12,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:33:12,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:33:12,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577636070] [2022-11-16 20:33:12,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:33:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:33:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:33:12,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:33:12,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:33:12,245 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:33:12,337 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-11-16 20:33:12,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:33:12,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 20:33:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:33:12,340 INFO L225 Difference]: With dead ends: 33 [2022-11-16 20:33:12,340 INFO L226 Difference]: Without dead ends: 25 [2022-11-16 20:33:12,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:33:12,343 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:33:12,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:33:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-16 20:33:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2022-11-16 20:33:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 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) [2022-11-16 20:33:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-16 20:33:12,354 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2022-11-16 20:33:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:33:12,354 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-16 20:33:12,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-16 20:33:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 20:33:12,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:33:12,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:33:12,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:33:12,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:33:12,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:33:12,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:33:12,570 INFO L85 PathProgramCache]: Analyzing trace with hash 212359228, now seen corresponding path program 1 times [2022-11-16 20:33:12,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:33:12,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955557422] [2022-11-16 20:33:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:33:12,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:33:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:33:12,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:33:12,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 20:33:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:33:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:33:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:12,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:33:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:12,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:33:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955557422] [2022-11-16 20:33:12,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955557422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:33:12,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1355759414] [2022-11-16 20:33:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:33:12,825 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:33:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:33:12,828 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:33:12,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-16 20:33:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:33:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:33:12,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:13,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:33:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:13,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1355759414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:33:13,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331565088] [2022-11-16 20:33:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:33:13,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:33:13,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:33:13,074 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:33:13,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:33:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:33:13,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:33:13,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:13,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:33:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:13,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331565088] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:33:13,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:33:13,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-11-16 20:33:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995979239] [2022-11-16 20:33:13,224 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:33:13,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:33:13,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:33:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:33:13,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:33:13,226 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-11-16 20:33:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:33:13,405 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-11-16 20:33:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:33:13,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 12 [2022-11-16 20:33:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:33:13,407 INFO L225 Difference]: With dead ends: 57 [2022-11-16 20:33:13,407 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 20:33:13,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:33:13,409 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:33:13,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 47 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:33:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 20:33:13,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 27. [2022-11-16 20:33:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-16 20:33:13,418 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 12 [2022-11-16 20:33:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:33:13,418 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-16 20:33:13,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-11-16 20:33:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-16 20:33:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 20:33:13,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:33:13,420 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:33:13,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:33:13,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 20:33:13,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:33:14,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:33:14,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:33:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:33:14,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2102142613, now seen corresponding path program 2 times [2022-11-16 20:33:14,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:33:14,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668705071] [2022-11-16 20:33:14,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:33:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:33:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:33:14,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:33:14,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 20:33:14,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:33:14,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:33:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:33:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:14,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:33:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:14,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:33:14,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668705071] [2022-11-16 20:33:14,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668705071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:33:14,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1174001449] [2022-11-16 20:33:14,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:33:14,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:33:14,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:33:14,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:33:14,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-16 20:33:14,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:33:14,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:33:14,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:33:14,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:14,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:33:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:14,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1174001449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:33:14,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760629959] [2022-11-16 20:33:14,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 20:33:14,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:33:14,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:33:14,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:33:14,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 20:33:15,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 20:33:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:33:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 20:33:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:15,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:33:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:15,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760629959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:33:15,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 20:33:15,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2022-11-16 20:33:15,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230388215] [2022-11-16 20:33:15,284 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 20:33:15,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 20:33:15,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 20:33:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 20:33:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 20:33:15,286 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:33:16,189 INFO L93 Difference]: Finished difference Result 123 states and 151 transitions. [2022-11-16 20:33:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 20:33:16,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 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 24 [2022-11-16 20:33:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:33:16,191 INFO L225 Difference]: With dead ends: 123 [2022-11-16 20:33:16,192 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 20:33:16,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 20:33:16,194 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 249 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:33:16,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 244 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 20:33:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 20:33:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 51. [2022-11-16 20:33:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-11-16 20:33:16,209 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 24 [2022-11-16 20:33:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:33:16,209 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-11-16 20:33:16,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:33:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-11-16 20:33:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 20:33:16,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:33:16,211 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:33:16,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:33:16,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 20:33:16,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-16 20:33:16,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 20:33:16,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:33:16,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:33:16,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1900720201, now seen corresponding path program 3 times [2022-11-16 20:33:16,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 20:33:16,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341175389] [2022-11-16 20:33:16,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:33:16,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 20:33:16,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 20:33:16,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 20:33:16,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 20:33:19,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 20:33:19,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:33:19,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:33:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:33:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:20,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:33:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:33:20,868 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 20:33:20,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341175389] [2022-11-16 20:33:20,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341175389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:33:20,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104485309] [2022-11-16 20:33:20,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:33:20,868 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 20:33:20,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 20:33:20,872 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 20:33:20,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-16 20:33:21,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 20:33:21,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436710891] [2022-11-16 20:33:21,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:33:21,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:33:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:33:21,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 1 [2022-11-16 20:33:21,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:33:21,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11046f7e-5f42-498d-97ac-5533c3fc8313/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process