./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9 --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 fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 --- 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-6b4ec56 [2022-11-20 19:52:10,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:52:10,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:52:10,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:52:10,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:52:10,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:52:10,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:52:10,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:52:10,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:52:10,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:52:10,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:52:10,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:52:10,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:52:10,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:52:10,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:52:10,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:52:10,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:52:10,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:52:10,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:52:10,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:52:10,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:52:10,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:52:10,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:52:10,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:52:10,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:52:10,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:52:10,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:52:10,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:52:10,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:52:10,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:52:10,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:52:10,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:52:10,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:52:10,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:52:10,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:52:10,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:52:10,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:52:10,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:52:10,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:52:10,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:52:10,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:52:10,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:52:10,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:52:10,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:52:10,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:52:10,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:52:10,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:52:10,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:52:10,385 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:52:10,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:52:10,385 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:52:10,386 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:52:10,386 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:52:10,386 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:52:10,387 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:52:10,387 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:52:10,387 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:52:10,388 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:52:10,388 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:52:10,388 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:52:10,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:52:10,390 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:52:10,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:52:10,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:52:10,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:52:10,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:52:10,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:52:10,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:52:10,392 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:52:10,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:52:10,393 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:52:10,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:52:10,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:52:10,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:52:10,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:52:10,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:52:10,395 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:52:10,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:52:10,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:52:10,396 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:52:10,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:52:10,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:52:10,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:52:10,397 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_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2022-11-20 19:52:10,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:52:10,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:52:10,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:52:10,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:52:10,803 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:52:10,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/loops/string-2.i [2022-11-20 19:52:14,472 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:52:14,745 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:52:14,746 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/sv-benchmarks/c/loops/string-2.i [2022-11-20 19:52:14,754 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/data/435a39043/64f5fdad0b894c5494246c45c55b9e4e/FLAG0c70a0a2b [2022-11-20 19:52:14,772 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/data/435a39043/64f5fdad0b894c5494246c45c55b9e4e [2022-11-20 19:52:14,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:52:14,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:52:14,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:52:14,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:52:14,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:52:14,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:14" (1/1) ... [2022-11-20 19:52:14,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3012477b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:14, skipping insertion in model container [2022-11-20 19:52:14,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:14" (1/1) ... [2022-11-20 19:52:14,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:52:14,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:52:15,084 WARN L237 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_848ecc5a-3a57-430c-9c38-7fd38b316b4e/sv-benchmarks/c/loops/string-2.i[896,909] [2022-11-20 19:52:15,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:52:15,121 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:52:15,136 WARN L237 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_848ecc5a-3a57-430c-9c38-7fd38b316b4e/sv-benchmarks/c/loops/string-2.i[896,909] [2022-11-20 19:52:15,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:52:15,163 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:52:15,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15 WrapperNode [2022-11-20 19:52:15,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:52:15,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:52:15,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:52:15,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:52:15,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,209 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2022-11-20 19:52:15,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:52:15,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:52:15,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:52:15,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:52:15,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,238 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:52:15,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:52:15,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:52:15,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:52:15,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (1/1) ... [2022-11-20 19:52:15,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:52:15,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:15,304 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:52:15,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:52:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:52:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:52:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:52:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 19:52:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:52:15,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:52:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 19:52:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:52:15,453 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:52:15,457 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:52:15,736 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:52:15,814 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:52:15,815 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 19:52:15,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:15 BoogieIcfgContainer [2022-11-20 19:52:15,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:52:15,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:52:15,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:52:15,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:52:15,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:52:14" (1/3) ... [2022-11-20 19:52:15,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e1869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:15, skipping insertion in model container [2022-11-20 19:52:15,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:15" (2/3) ... [2022-11-20 19:52:15,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e1869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:15, skipping insertion in model container [2022-11-20 19:52:15,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:15" (3/3) ... [2022-11-20 19:52:15,830 INFO L112 eAbstractionObserver]: Analyzing ICFG string-2.i [2022-11-20 19:52:15,854 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:52:15,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:52:15,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:52:15,931 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;@3ac88746, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:52:15,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:52:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 19:52:15,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:15,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:15,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:15,954 INFO L85 PathProgramCache]: Analyzing trace with hash -410377913, now seen corresponding path program 1 times [2022-11-20 19:52:15,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325378446] [2022-11-20 19:52:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:15,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:16,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:16,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325378446] [2022-11-20 19:52:16,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325378446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:16,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:16,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:52:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714705576] [2022-11-20 19:52:16,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:16,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:52:16,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:16,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:52:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:52:16,315 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2022-11-20 19:52:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:16,383 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2022-11-20 19:52:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:52:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 12 [2022-11-20 19:52:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:16,403 INFO L225 Difference]: With dead ends: 43 [2022-11-20 19:52:16,403 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 19:52:16,406 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 [2022-11-20 19:52:16,413 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:16,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 19:52:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2022-11-20 19:52:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-20 19:52:16,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-11-20 19:52:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:16,458 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-20 19:52:16,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2022-11-20 19:52:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-20 19:52:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 19:52:16,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:16,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:16,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:52:16,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash -650006370, now seen corresponding path program 1 times [2022-11-20 19:52:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:16,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423230648] [2022-11-20 19:52:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:16,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:16,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:16,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423230648] [2022-11-20 19:52:16,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423230648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084063606] [2022-11-20 19:52:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:16,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:16,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:16,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:52:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:16,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:52:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:16,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:16,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084063606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:16,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758103377] [2022-11-20 19:52:16,921 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 19:52:16,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:16,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:16,937 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:16,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:17,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:17,233 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 19:52:17,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 19:52:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:17,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:17,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-20 19:52:17,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:17,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-20 19:52:17,621 INFO L321 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2022-11-20 19:52:17,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 252 treesize of output 242 [2022-11-20 19:52:17,833 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 14 treesize of output 10 [2022-11-20 19:52:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:17,915 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:52:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:18,091 INFO L321 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2022-11-20 19:52:18,092 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 88 treesize of output 84 [2022-11-20 19:52:18,192 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 14 treesize of output 10 [2022-11-20 19:52:18,261 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:19,216 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '206#(and (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~#string_B~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_B~0#1.base|) (+ |ULTIMATE.start_main_~#string_B~0#1.offset| 4)) 0) (= |ULTIMATE.start_main_~#string_B~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~nc_A~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_B~0#1.base|) (+ |ULTIMATE.start_main_~#string_B~0#1.offset| |ULTIMATE.start_main_~nc_B~0#1|)) 0) (= (ite (or (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start_main_~found~0#1| 0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 0 |ULTIMATE.start_main_~#string_A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#string_A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_A~0#1.base|) (+ |ULTIMATE.start_main_~nc_A~0#1| |ULTIMATE.start_main_~#string_A~0#1.offset|)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~nc_B~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:52:19,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:19,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:19,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 19:52:19,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201262101] [2022-11-20 19:52:19,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:19,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:52:19,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:52:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:52:19,221 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:19,290 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2022-11-20 19:52:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:52:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 19:52:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:19,292 INFO L225 Difference]: With dead ends: 41 [2022-11-20 19:52:19,292 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 19:52:19,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:52:19,295 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:19,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 19:52:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-11-20 19:52:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-20 19:52:19,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2022-11-20 19:52:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:19,309 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-20 19:52:19,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-20 19:52:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:52:19,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:19,313 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:19,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:19,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:19,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash 522576029, now seen corresponding path program 2 times [2022-11-20 19:52:19,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:19,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519690723] [2022-11-20 19:52:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:19,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 19:52:19,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:19,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519690723] [2022-11-20 19:52:19,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519690723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:19,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823786633] [2022-11-20 19:52:19,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:52:19,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:19,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:19,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:19,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:52:19,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:52:19,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:52:19,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:19,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 19:52:19,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 19:52:20,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823786633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:20,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353101321] [2022-11-20 19:52:20,064 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 19:52:20,064 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:20,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:20,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:20,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:20,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:20,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:20,148 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-20 19:52:20,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 19:52:20,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:20,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:20,229 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 19:52:20,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-20 19:52:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:20,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 19:52:20,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:52:20,432 INFO L321 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-20 19:52:20,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 243 [2022-11-20 19:52:20,632 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 14 treesize of output 10 [2022-11-20 19:52:20,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:20,679 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:52:20,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:20,762 INFO L321 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2022-11-20 19:52:20,762 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 88 treesize of output 84 [2022-11-20 19:52:20,843 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 14 treesize of output 10 [2022-11-20 19:52:20,891 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:21,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '447#(and (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~#string_B~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_B~0#1.base|) (+ |ULTIMATE.start_main_~#string_B~0#1.offset| 4)) 0) (= |ULTIMATE.start_main_~#string_B~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~nc_A~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_B~0#1.base|) (+ |ULTIMATE.start_main_~#string_B~0#1.offset| |ULTIMATE.start_main_~nc_B~0#1|)) 0) (= (ite (or (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start_main_~found~0#1| 0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 0 |ULTIMATE.start_main_~#string_A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#string_A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_A~0#1.base|) (+ |ULTIMATE.start_main_~nc_A~0#1| |ULTIMATE.start_main_~#string_A~0#1.offset|)) 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~nc_B~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:52:21,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:21,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:21,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-20 19:52:21,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11372621] [2022-11-20 19:52:21,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:21,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:52:21,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:21,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:52:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:52:21,802 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:21,871 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-11-20 19:52:21,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:52:21,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 19:52:21,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:21,873 INFO L225 Difference]: With dead ends: 46 [2022-11-20 19:52:21,873 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 19:52:21,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:52:21,880 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:21,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:21,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 19:52:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-20 19:52:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-20 19:52:21,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-11-20 19:52:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:21,896 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-20 19:52:21,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-20 19:52:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 19:52:21,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:21,898 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:21,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:22,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:22,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2037411294, now seen corresponding path program 3 times [2022-11-20 19:52:22,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:22,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040809955] [2022-11-20 19:52:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:52:22,203 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 19:52:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:52:22,303 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 19:52:22,303 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 19:52:22,304 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 19:52:22,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:52:22,311 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1] [2022-11-20 19:52:22,316 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 19:52:22,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:52:22 BoogieIcfgContainer [2022-11-20 19:52:22,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 19:52:22,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 19:52:22,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 19:52:22,393 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 19:52:22,393 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:15" (3/4) ... [2022-11-20 19:52:22,397 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 19:52:22,397 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 19:52:22,398 INFO L158 Benchmark]: Toolchain (without parser) took 7621.17ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 126.5MB in the beginning and 83.6MB in the end (delta: 42.9MB). Peak memory consumption was 76.0MB. Max. memory is 16.1GB. [2022-11-20 19:52:22,399 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:52:22,399 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.91ms. Allocated memory is still 161.5MB. Free memory was 126.5MB in the beginning and 131.3MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 19:52:22,399 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.43ms. Allocated memory is still 161.5MB. Free memory was 131.3MB in the beginning and 129.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 19:52:22,400 INFO L158 Benchmark]: Boogie Preprocessor took 41.29ms. Allocated memory is still 161.5MB. Free memory was 129.2MB in the beginning and 127.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 19:52:22,400 INFO L158 Benchmark]: RCFGBuilder took 566.42ms. Allocated memory is still 161.5MB. Free memory was 127.8MB in the beginning and 113.0MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-20 19:52:22,401 INFO L158 Benchmark]: TraceAbstraction took 6570.67ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 112.3MB in the beginning and 83.6MB in the end (delta: 28.7MB). Peak memory consumption was 65.3MB. Max. memory is 16.1GB. [2022-11-20 19:52:22,401 INFO L158 Benchmark]: Witness Printer took 5.06ms. Allocated memory is still 195.0MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:52:22,403 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.91ms. Allocated memory is still 161.5MB. Free memory was 126.5MB in the beginning and 131.3MB in the end (delta: -4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.43ms. Allocated memory is still 161.5MB. Free memory was 131.3MB in the beginning and 129.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.29ms. Allocated memory is still 161.5MB. Free memory was 129.2MB in the beginning and 127.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 566.42ms. Allocated memory is still 161.5MB. Free memory was 127.8MB in the beginning and 113.0MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 6570.67ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 112.3MB in the beginning and 83.6MB in the end (delta: 28.7MB). Peak memory consumption was 65.3MB. Max. memory is 16.1GB. * Witness Printer took 5.06ms. Allocated memory is still 195.0MB. Free memory is still 83.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 69. Possible FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 VAL [found=0, i=0, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=1, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=2, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=3, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=4, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L35] COND FALSE !(i<5) [L37] EXPR string_A[5 -1] VAL [found=0, i=5, string_A={6:0}, string_A[5 -1]=0, string_B={7:0}] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 VAL [found=0, i=0, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=1, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=2, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=3, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=4, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=5, string_A={6:0}, string_B={7:0}] [L39] COND FALSE !(i<5) [L41] EXPR string_B[5 -1] VAL [found=0, i=5, string_A={6:0}, string_B={7:0}, string_B[5 -1]=0] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={6:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={6:0}, string_A[nc_A]=0, string_B={7:0}] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={6:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=0, nc_B=0, string_A={6:0}, string_B={7:0}, string_B[nc_B]=0] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 VAL [found=0, i=0, j=0, nc_A=0, nc_B=0, string_A={6:0}, string_B={7:0}] [L55] COND FALSE !((inc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9 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 -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2022-11-20 19:52:26,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:52:26,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:52:26,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:52:26,342 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:52:26,343 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:52:26,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/loops/string-2.i [2022-11-20 19:52:30,014 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:52:30,328 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:52:30,329 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/sv-benchmarks/c/loops/string-2.i [2022-11-20 19:52:30,338 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/data/d8d182c04/87ef37f14c5f4ea5bd986f5b0687d1dc/FLAGd44403660 [2022-11-20 19:52:30,354 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/data/d8d182c04/87ef37f14c5f4ea5bd986f5b0687d1dc [2022-11-20 19:52:30,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:52:30,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:52:30,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:52:30,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:52:30,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:52:30,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150bd6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30, skipping insertion in model container [2022-11-20 19:52:30,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:52:30,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:52:30,654 WARN L237 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_848ecc5a-3a57-430c-9c38-7fd38b316b4e/sv-benchmarks/c/loops/string-2.i[896,909] [2022-11-20 19:52:30,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:52:30,729 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:52:30,758 WARN L237 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_848ecc5a-3a57-430c-9c38-7fd38b316b4e/sv-benchmarks/c/loops/string-2.i[896,909] [2022-11-20 19:52:30,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:52:30,793 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:52:30,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30 WrapperNode [2022-11-20 19:52:30,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:52:30,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:52:30,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:52:30,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:52:30,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,843 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2022-11-20 19:52:30,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:52:30,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:52:30,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:52:30,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:52:30,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,878 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:52:30,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:52:30,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:52:30,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:52:30,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (1/1) ... [2022-11-20 19:52:30,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:52:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:30,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:52:30,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:52:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:52:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-20 19:52:31,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 19:52:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:52:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:52:31,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:52:31,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-20 19:52:31,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:52:31,161 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:52:31,163 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:52:31,633 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:52:31,655 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:52:31,656 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 19:52:31,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:31 BoogieIcfgContainer [2022-11-20 19:52:31,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:52:31,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:52:31,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:52:31,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:52:31,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:52:30" (1/3) ... [2022-11-20 19:52:31,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f641ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:31, skipping insertion in model container [2022-11-20 19:52:31,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:30" (2/3) ... [2022-11-20 19:52:31,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f641ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:31, skipping insertion in model container [2022-11-20 19:52:31,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:31" (3/3) ... [2022-11-20 19:52:31,670 INFO L112 eAbstractionObserver]: Analyzing ICFG string-2.i [2022-11-20 19:52:31,705 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:52:31,706 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:52:31,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:52:31,787 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;@78f042e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:52:31,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:52:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 19:52:31,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:31,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:31,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:31,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2022-11-20 19:52:31,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:31,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296191630] [2022-11-20 19:52:31,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:31,842 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 [2022-11-20 19:52:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:31,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 19:52:31,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:31,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 19:52:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:32,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:52:32,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296191630] [2022-11-20 19:52:32,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296191630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:32,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:32,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:52:32,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699813618] [2022-11-20 19:52:32,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:32,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 19:52:32,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:32,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 19:52:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:52:32,085 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:32,117 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2022-11-20 19:52:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 19:52:32,121 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 19:52:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:32,131 INFO L225 Difference]: With dead ends: 48 [2022-11-20 19:52:32,132 INFO L226 Difference]: Without dead ends: 22 [2022-11-20 19:52:32,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:52:32,144 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-11-20 19:52:32,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:32,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-20 19:52:32,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-20 19:52:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-20 19:52:32,198 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2022-11-20 19:52:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:32,199 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-20 19:52:32,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-20 19:52:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 19:52:32,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:32,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:32,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:32,419 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2022-11-20 19:52:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:32,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432293499] [2022-11-20 19:52:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:32,422 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 [2022-11-20 19:52:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:32,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 19:52:32,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:52:32,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:52:32,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:52:32,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432293499] [2022-11-20 19:52:32,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432293499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:32,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:32,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:52:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065298060] [2022-11-20 19:52:32,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:32,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:52:32,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:32,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:52:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:52:32,637 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-11-20 19:52:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:32,728 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2022-11-20 19:52:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:52:32,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2022-11-20 19:52:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:32,732 INFO L225 Difference]: With dead ends: 50 [2022-11-20 19:52:32,733 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 19:52:32,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:52:32,735 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:32,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 19:52:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2022-11-20 19:52:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-20 19:52:32,745 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2022-11-20 19:52:32,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:32,746 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-20 19:52:32,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-11-20 19:52:32,746 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-20 19:52:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 19:52:32,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:32,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:32,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:32,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:32,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2022-11-20 19:52:32,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:32,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743594839] [2022-11-20 19:52:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:32,952 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 [2022-11-20 19:52:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:32,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 19:52:32,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:33,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:52:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:33,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:33,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:33,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743594839] [2022-11-20 19:52:33,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743594839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:33,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [680645463] [2022-11-20 19:52:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:33,208 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:33,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:52:33,212 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:52:33,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-20 19:52:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:33,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:52:33,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:33,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:33,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [680645463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:33,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723523124] [2022-11-20 19:52:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:33,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:33,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:33,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:52:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:52:33,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:33,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:52:33,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723523124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:33,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:52:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-11-20 19:52:33,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274619383] [2022-11-20 19:52:33,724 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:33,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:52:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:33,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:52:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:52:33,727 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:34,009 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2022-11-20 19:52:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:52:34,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 19:52:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:34,013 INFO L225 Difference]: With dead ends: 79 [2022-11-20 19:52:34,013 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 19:52:34,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:52:34,021 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:34,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 63 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:52:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 19:52:34,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 36. [2022-11-20 19:52:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-20 19:52:34,033 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 22 [2022-11-20 19:52:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:34,033 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-20 19:52:34,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-20 19:52:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 19:52:34,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:34,035 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:34,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:34,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:34,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:34,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:34,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 2 times [2022-11-20 19:52:34,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184736304] [2022-11-20 19:52:34,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:52:34,657 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 [2022-11-20 19:52:34,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:34,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 19:52:34,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:34,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 19:52:34,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:52:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:52:34,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 19:52:34,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:52:34,850 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:34,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184736304] [2022-11-20 19:52:34,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184736304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:34,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:52:34,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:52:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378189458] [2022-11-20 19:52:34,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:34,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:52:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:52:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:52:34,853 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:34,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:34,917 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-11-20 19:52:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:52:34,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 19:52:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:34,928 INFO L225 Difference]: With dead ends: 48 [2022-11-20 19:52:34,929 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 19:52:34,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:52:34,932 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:34,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 63 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 19:52:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-20 19:52:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-20 19:52:34,951 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 34 [2022-11-20 19:52:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:34,951 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-20 19:52:34,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:34,952 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-20 19:52:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 19:52:34,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:34,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:34,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:35,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:35,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:35,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:35,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1829932657, now seen corresponding path program 1 times [2022-11-20 19:52:35,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:35,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40609690] [2022-11-20 19:52:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:35,169 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 [2022-11-20 19:52:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:35,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 19:52:35,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 (8)] Waiting until timeout for monitored process [2022-11-20 19:52:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:35,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 19:52:35,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 19:52:35,512 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40609690] [2022-11-20 19:52:35,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40609690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2042937807] [2022-11-20 19:52:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:35,513 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:52:35,519 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:52:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 19:52:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:35,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:35,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 19:52:35,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 19:52:35,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2042937807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:35,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786321507] [2022-11-20 19:52:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:35,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:35,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:35,794 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:35,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:52:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:52:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 19:52:36,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 19:52:36,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786321507] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:36,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-20 19:52:36,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7, 7, 7, 8] total 19 [2022-11-20 19:52:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697706136] [2022-11-20 19:52:36,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:36,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:52:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:52:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-20 19:52:36,346 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:36,555 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-20 19:52:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:52:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 19:52:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:36,556 INFO L225 Difference]: With dead ends: 43 [2022-11-20 19:52:36,556 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 19:52:36,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:52:36,558 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:36,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:52:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 19:52:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-20 19:52:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-20 19:52:36,565 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 36 [2022-11-20 19:52:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:36,566 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-20 19:52:36,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-20 19:52:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 19:52:36,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:36,567 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:36,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 (8)] Ended with exit code 0 [2022-11-20 19:52:36,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:36,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:37,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:37,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1974004308, now seen corresponding path program 1 times [2022-11-20 19:52:37,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:37,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739079169] [2022-11-20 19:52:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:37,181 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 [2022-11-20 19:52:37,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:37,182 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 19:52:37,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 (11)] Waiting until timeout for monitored process [2022-11-20 19:52:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 19:52:37,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 19:52:37,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:37,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739079169] [2022-11-20 19:52:37,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739079169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:37,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690190771] [2022-11-20 19:52:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:37,479 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:37,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:52:37,485 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:52:37,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-20 19:52:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:37,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:37,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 19:52:37,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 19:52:37,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1690190771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:37,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126706303] [2022-11-20 19:52:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:37,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:37,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:37,707 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:37,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 19:52:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:37,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:52:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 19:52:37,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:52:37,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126706303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:52:37,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 19:52:37,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7, 7, 7] total 14 [2022-11-20 19:52:37,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362513893] [2022-11-20 19:52:37,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:52:37,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:52:37,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:52:37,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:52:37,875 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:37,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:37,905 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-11-20 19:52:37,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:52:37,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 19:52:37,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:37,907 INFO L225 Difference]: With dead ends: 54 [2022-11-20 19:52:37,907 INFO L226 Difference]: Without dead ends: 41 [2022-11-20 19:52:37,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:52:37,908 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:37,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:52:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-20 19:52:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-20 19:52:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-20 19:52:37,915 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 38 [2022-11-20 19:52:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:37,916 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-20 19:52:37,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-20 19:52:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 19:52:37,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:37,917 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:37,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-11-20 19:52:38,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:38,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:38,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:38,520 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:38,521 INFO L85 PathProgramCache]: Analyzing trace with hash 420019641, now seen corresponding path program 1 times [2022-11-20 19:52:38,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:38,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579491899] [2022-11-20 19:52:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:38,521 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 [2022-11-20 19:52:38,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:38,523 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 19:52:38,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 (14)] Waiting until timeout for monitored process [2022-11-20 19:52:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:38,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:38,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 19:52:38,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 19:52:38,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:52:38,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579491899] [2022-11-20 19:52:38,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579491899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:38,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098343084] [2022-11-20 19:52:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:38,808 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:52:38,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:52:38,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:52:38,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-20 19:52:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:38,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 19:52:39,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 19:52:39,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098343084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:39,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807973323] [2022-11-20 19:52:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:39,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:39,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:39,044 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:39,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 19:52:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:52:39,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 19:52:39,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 19:52:39,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807973323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:39,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:52:39,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2022-11-20 19:52:39,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696343600] [2022-11-20 19:52:39,213 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 19:52:39,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:52:39,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 19:52:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-20 19:52:39,214 INFO L87 Difference]: Start difference. First operand 41 states and 46 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) [2022-11-20 19:52:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:39,632 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2022-11-20 19:52:39,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:52:39,633 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 40 [2022-11-20 19:52:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:39,634 INFO L225 Difference]: With dead ends: 102 [2022-11-20 19:52:39,634 INFO L226 Difference]: Without dead ends: 72 [2022-11-20 19:52:39,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-20 19:52:39,635 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:39,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 140 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:52:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-20 19:52:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 45. [2022-11-20 19:52:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:52:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-11-20 19:52:39,642 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 40 [2022-11-20 19:52:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:39,643 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-11-20 19:52:39,643 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) [2022-11-20 19:52:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-11-20 19:52:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 19:52:39,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:39,644 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:52:39,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 (14)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:39,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:40,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:40,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:40,245 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:40,245 INFO L85 PathProgramCache]: Analyzing trace with hash -512239655, now seen corresponding path program 2 times [2022-11-20 19:52:40,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:52:40,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430055297] [2022-11-20 19:52:40,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:52:40,247 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 [2022-11-20 19:52:40,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:52:40,248 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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) [2022-11-20 19:52:40,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 (17)] Waiting until timeout for monitored process [2022-11-20 19:52:40,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:52:40,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-11-20 19:52:40,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 19:52:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:52:40,731 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-20 19:52:40,732 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 19:52:40,733 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 19:52:40,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 (17)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:40,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/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 [2022-11-20 19:52:40,939 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2022-11-20 19:52:40,944 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 19:52:41,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:52:41 BoogieIcfgContainer [2022-11-20 19:52:41,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 19:52:41,037 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 19:52:41,037 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 19:52:41,038 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 19:52:41,038 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:31" (3/4) ... [2022-11-20 19:52:41,040 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 19:52:41,117 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_848ecc5a-3a57-430c-9c38-7fd38b316b4e/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 19:52:41,117 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 19:52:41,118 INFO L158 Benchmark]: Toolchain (without parser) took 10760.06ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 63.2MB in the beginning and 76.5MB in the end (delta: -13.4MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2022-11-20 19:52:41,119 INFO L158 Benchmark]: CDTParser took 0.91ms. Allocated memory is still 86.0MB. Free memory is still 63.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:52:41,119 INFO L158 Benchmark]: CACSL2BoogieTranslator took 435.10ms. Allocated memory is still 86.0MB. Free memory was 62.9MB in the beginning and 51.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 19:52:41,119 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.11ms. Allocated memory is still 86.0MB. Free memory was 51.9MB in the beginning and 50.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 19:52:41,120 INFO L158 Benchmark]: Boogie Preprocessor took 38.59ms. Allocated memory is still 86.0MB. Free memory was 50.0MB in the beginning and 48.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 19:52:41,120 INFO L158 Benchmark]: RCFGBuilder took 774.87ms. Allocated memory is still 86.0MB. Free memory was 48.5MB in the beginning and 59.7MB in the end (delta: -11.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2022-11-20 19:52:41,121 INFO L158 Benchmark]: TraceAbstraction took 9375.21ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 58.7MB in the beginning and 80.8MB in the end (delta: -22.1MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2022-11-20 19:52:41,121 INFO L158 Benchmark]: Witness Printer took 80.58ms. Allocated memory is still 113.2MB. Free memory was 80.6MB in the beginning and 76.5MB in the end (delta: 4.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 19:52:41,123 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91ms. Allocated memory is still 86.0MB. Free memory is still 63.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 435.10ms. Allocated memory is still 86.0MB. Free memory was 62.9MB in the beginning and 51.9MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.11ms. Allocated memory is still 86.0MB. Free memory was 51.9MB in the beginning and 50.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.59ms. Allocated memory is still 86.0MB. Free memory was 50.0MB in the beginning and 48.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 774.87ms. Allocated memory is still 86.0MB. Free memory was 48.5MB in the beginning and 59.7MB in the end (delta: -11.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * TraceAbstraction took 9375.21ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 58.7MB in the beginning and 80.8MB in the end (delta: -22.1MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Witness Printer took 80.58ms. Allocated memory is still 113.2MB. Free memory was 80.6MB in the beginning and 76.5MB in the end (delta: 4.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 VAL [found=0, i=0, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=1, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=2, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=3, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=4, string_A={3:0}, string_B={7:0}] [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [found=0, i=5, string_A={3:0}, string_B={7:0}] [L35] COND FALSE !(i<5) VAL [found=0, i=5, string_A={3:0}, string_B={7:0}] [L37] EXPR string_A[5 -1] VAL [found=0, i=5, string_A={3:0}, string_A[5 -1]=0, string_B={7:0}] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 VAL [found=0, i=0, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=1, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=2, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=3, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=4, string_A={3:0}, string_B={7:0}] [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [found=0, i=5, string_A={3:0}, string_B={7:0}] [L39] COND FALSE !(i<5) VAL [found=0, i=5, string_A={3:0}, string_B={7:0}] [L41] EXPR string_B[5 -1] VAL [found=0, i=5, string_A={3:0}, string_B={7:0}, string_B[5 -1]=0] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 VAL [found=0, i=5, nc_A=0, string_A={3:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=0, string_A={3:0}, string_A[nc_A]=-128, string_B={7:0}] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ VAL [found=0, i=5, nc_A=1, string_A={3:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] VAL [found=0, i=5, nc_A=1, string_A={3:0}, string_A[nc_A]=0, string_B={7:0}] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={3:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=1, nc_B=0, string_A={3:0}, string_B={7:0}, string_B[nc_B]=-128] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={3:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] VAL [found=0, i=5, nc_A=1, nc_B=1, string_A={3:0}, string_B={7:0}, string_B[nc_B]=0] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 VAL [found=0, i=0, j=0, nc_A=1, nc_B=1, string_A={3:0}, string_B={7:0}] [L55] COND TRUE (inc_B-1)<