./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/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_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/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_ae55bac4-a981-4bab-aadb-757be0b67863/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 5bba06987e8c2f8236800dde4bec4c9d50f427f841de99efa853660259681b37 --- 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 20:55:21,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:55:21,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:55:21,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:55:21,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:55:21,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:55:21,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:55:21,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:55:21,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:55:21,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:55:21,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:55:21,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:55:21,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:55:21,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:55:21,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:55:21,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:55:21,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:55:21,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:55:21,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:55:21,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:55:21,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:55:21,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:55:21,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:55:21,326 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:55:21,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:55:21,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:55:21,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:55:21,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:55:21,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:55:21,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:55:21,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:55:21,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:55:21,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:55:21,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:55:21,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:55:21,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:55:21,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:55:21,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:55:21,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:55:21,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:55:21,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:55:21,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:55:21,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:55:21,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:55:21,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:55:21,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:55:21,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:55:21,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:55:21,406 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:55:21,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:55:21,407 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:55:21,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:55:21,408 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:55:21,409 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:55:21,409 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:55:21,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:55:21,409 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:55:21,410 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:55:21,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:55:21,410 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:55:21,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:55:21,411 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:55:21,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:55:21,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:55:21,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:55:21,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:55:21,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:55:21,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:55:21,413 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:55:21,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:55:21,414 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:55:21,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:55:21,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:55:21,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:55:21,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:55:21,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:55:21,415 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:55:21,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:55:21,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:55:21,416 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:55:21,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:55:21,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:55:21,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:55:21,418 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_ae55bac4-a981-4bab-aadb-757be0b67863/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bba06987e8c2f8236800dde4bec4c9d50f427f841de99efa853660259681b37 [2022-11-20 20:55:21,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:55:21,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:55:21,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:55:21,750 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:55:21,750 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:55:21,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c [2022-11-20 20:55:24,838 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:55:25,093 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:55:25,093 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c [2022-11-20 20:55:25,101 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/data/6a9d70339/da7b20fc908248a7911cefad9c58ab09/FLAG7e607ed23 [2022-11-20 20:55:25,116 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/data/6a9d70339/da7b20fc908248a7911cefad9c58ab09 [2022-11-20 20:55:25,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:55:25,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:55:25,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:55:25,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:55:25,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:55:25,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e320aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25, skipping insertion in model container [2022-11-20 20:55:25,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:55:25,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:55:25,318 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_ae55bac4-a981-4bab-aadb-757be0b67863/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2022-11-20 20:55:25,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:55:25,389 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:55:25,408 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_ae55bac4-a981-4bab-aadb-757be0b67863/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound100.c[525,538] [2022-11-20 20:55:25,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:55:25,464 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:55:25,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25 WrapperNode [2022-11-20 20:55:25,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:55:25,466 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:55:25,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:55:25,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:55:25,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,534 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-11-20 20:55:25,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:55:25,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:55:25,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:55:25,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:55:25,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,570 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:55:25,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:55:25,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:55:25,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:55:25,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (1/1) ... [2022-11-20 20:55:25,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:55:25,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:55:25,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:55:25,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:55:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:55:25,661 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 20:55:25,661 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 20:55:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:55:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:55:25,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:55:25,662 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 20:55:25,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 20:55:25,735 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:55:25,737 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:55:25,968 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:55:26,003 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:55:26,003 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:55:26,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:55:26 BoogieIcfgContainer [2022-11-20 20:55:26,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:55:26,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:55:26,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:55:26,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:55:26,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:55:25" (1/3) ... [2022-11-20 20:55:26,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72202dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:55:26, skipping insertion in model container [2022-11-20 20:55:26,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:55:25" (2/3) ... [2022-11-20 20:55:26,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72202dd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:55:26, skipping insertion in model container [2022-11-20 20:55:26,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:55:26" (3/3) ... [2022-11-20 20:55:26,022 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound100.c [2022-11-20 20:55:26,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:55:26,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:55:26,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:55:26,135 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;@6350116d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:55:26,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:55:26,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 20:55:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:55:26,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:26,151 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:26,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:55:26,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:26,159 INFO L85 PathProgramCache]: Analyzing trace with hash 282219046, now seen corresponding path program 1 times [2022-11-20 20:55:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:55:26,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586548629] [2022-11-20 20:55:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:55:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:26,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:55:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586548629] [2022-11-20 20:55:26,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 20:55:26,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712909873] [2022-11-20 20:55:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:26,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:55:26,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:55:26,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:55:26,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:55:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:26,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 20:55:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:55:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:55:26,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:55:26,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712909873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:55:26,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:55:26,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:55:26,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320508085] [2022-11-20 20:55:26,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:55:26,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:55:26,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:55:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:55:26,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:55:26,505 INFO L87 Difference]: Start difference. First operand has 27 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:55:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:55:26,571 INFO L93 Difference]: Finished difference Result 46 states and 78 transitions. [2022-11-20 20:55:26,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:55:26,588 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-11-20 20:55:26,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:55:26,596 INFO L225 Difference]: With dead ends: 46 [2022-11-20 20:55:26,596 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 20:55:26,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 20:55:26,603 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:55:26,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:55:26,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 20:55:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 20:55:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 20:55:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-11-20 20:55:26,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 14 [2022-11-20 20:55:26,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:55:26,656 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-11-20 20:55:26,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:55:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-11-20 20:55:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:55:26,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:26,658 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:26,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 20:55:26,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 20:55:26,863 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:55:26,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1143065712, now seen corresponding path program 1 times [2022-11-20 20:55:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:55:26,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981312125] [2022-11-20 20:55:26,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:26,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:55:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:55:27,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:55:27,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981312125] [2022-11-20 20:55:27,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981312125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:55:27,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:55:27,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:55:27,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294166695] [2022-11-20 20:55:27,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:55:27,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:55:27,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:55:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:55:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:55:27,560 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:55:29,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:31,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:33,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:35,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:36,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:55:36,249 INFO L93 Difference]: Finished difference Result 59 states and 87 transitions. [2022-11-20 20:55:36,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:55:36,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-11-20 20:55:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:55:36,252 INFO L225 Difference]: With dead ends: 59 [2022-11-20 20:55:36,253 INFO L226 Difference]: Without dead ends: 42 [2022-11-20 20:55:36,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:55:36,255 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:55:36,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 4 Unknown, 0 Unchecked, 8.6s Time] [2022-11-20 20:55:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-20 20:55:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-20 20:55:36,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-20 20:55:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2022-11-20 20:55:36,295 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 15 [2022-11-20 20:55:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:55:36,296 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2022-11-20 20:55:36,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:55:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2022-11-20 20:55:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 20:55:36,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:55:36,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:55:36,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:55:36,299 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:55:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:55:36,301 INFO L85 PathProgramCache]: Analyzing trace with hash -720172405, now seen corresponding path program 1 times [2022-11-20 20:55:36,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:55:36,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024275028] [2022-11-20 20:55:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:55:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:55:36,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:55:36,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024275028] [2022-11-20 20:55:36,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024275028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:55:36,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943696031] [2022-11-20 20:55:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:55:36,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:55:36,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:55:36,810 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:55:36,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:55:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:55:36,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:55:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:55:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:55:37,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:55:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:55:37,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943696031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:55:37,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234413470] [2022-11-20 20:55:37,284 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-20 20:55:37,284 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:55:37,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:55:37,295 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:55:37,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:55:37,661 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-11-20 20:55:37,706 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2022-11-20 20:55:37,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:55:38,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '466#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:55:38,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:55:38,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:55:38,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-20 20:55:38,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726487653] [2022-11-20 20:55:38,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:55:38,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 20:55:38,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:55:38,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 20:55:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:55:38,930 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:55:43,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:45,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:47,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:52,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:54,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:55:58,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:00,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:03,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:06,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:09,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:13,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:15,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:17,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:56:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:56:20,180 INFO L93 Difference]: Finished difference Result 96 states and 149 transitions. [2022-11-20 20:56:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:56:20,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-20 20:56:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:56:20,183 INFO L225 Difference]: With dead ends: 96 [2022-11-20 20:56:20,183 INFO L226 Difference]: Without dead ends: 85 [2022-11-20 20:56:20,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-11-20 20:56:20,185 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 89 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:56:20,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 262 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 385 Invalid, 9 Unknown, 0 Unchecked, 41.0s Time] [2022-11-20 20:56:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-20 20:56:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56. [2022-11-20 20:56:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 29 states have internal predecessors, (31), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-20 20:56:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 79 transitions. [2022-11-20 20:56:20,211 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 79 transitions. Word has length 17 [2022-11-20 20:56:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:56:20,212 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 79 transitions. [2022-11-20 20:56:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:56:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 79 transitions. [2022-11-20 20:56:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 20:56:20,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:56:20,214 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:56:20,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:56:20,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:56:20,420 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:56:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:56:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1424404976, now seen corresponding path program 1 times [2022-11-20 20:56:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:56:20,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224480159] [2022-11-20 20:56:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:56:20,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:56:20,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65508061] [2022-11-20 20:56:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:56:20,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:56:20,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:56:20,436 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:56:20,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:56:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:56:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 20:56:20,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:56:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:56:20,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:56:55,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:56:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224480159] [2022-11-20 20:56:55,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:56:55,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65508061] [2022-11-20 20:56:55,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65508061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:56:55,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381342359] [2022-11-20 20:56:55,410 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-20 20:56:55,410 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:56:55,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:56:55,411 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:56:55,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:56:55,765 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 71 for LOIs [2022-11-20 20:56:55,897 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2022-11-20 20:56:55,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:57:10,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1381342359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:57:10,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:57:10,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 16 [2022-11-20 20:57:10,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044412065] [2022-11-20 20:57:10,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:57:10,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:57:10,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:57:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:57:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=263, Unknown=10, NotChecked=0, Total=342 [2022-11-20 20:57:10,349 INFO L87 Difference]: Start difference. First operand 56 states and 79 transitions. Second operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:57:12,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:57:16,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:57:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:57:16,499 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2022-11-20 20:57:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:57:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-11-20 20:57:16,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:57:16,502 INFO L225 Difference]: With dead ends: 68 [2022-11-20 20:57:16,503 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 20:57:16,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=69, Invalid=263, Unknown=10, NotChecked=0, Total=342 [2022-11-20 20:57:16,504 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:57:16,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 59 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 2 Unknown, 86 Unchecked, 6.1s Time] [2022-11-20 20:57:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 20:57:16,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-11-20 20:57:16,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-20 20:57:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 85 transitions. [2022-11-20 20:57:16,553 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 85 transitions. Word has length 25 [2022-11-20 20:57:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:57:16,554 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 85 transitions. [2022-11-20 20:57:16,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:57:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 85 transitions. [2022-11-20 20:57:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:57:16,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:57:16,555 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:57:16,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:57:16,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:16,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:57:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:57:16,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1649199171, now seen corresponding path program 1 times [2022-11-20 20:57:16,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:57:16,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129358724] [2022-11-20 20:57:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:16,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:57:16,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 20:57:16,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680154911] [2022-11-20 20:57:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:57:16,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:57:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:57:16,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:57:16,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:57:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:57:16,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 20:57:16,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:57:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:57:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:57:25,222 WARN L859 $PredicateComparison]: unable to prove that (or (<= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296) (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296))) is different from true [2022-11-20 20:57:52,491 WARN L233 SmtUtils]: Spent 6.69s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:58:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:58:10,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:58:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129358724] [2022-11-20 20:58:10,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 20:58:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680154911] [2022-11-20 20:58:10,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680154911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:58:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476242139] [2022-11-20 20:58:10,297 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 20:58:10,297 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:58:10,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:58:10,297 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:58:10,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:58:10,543 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 52 for LOIs [2022-11-20 20:58:10,625 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2022-11-20 20:58:10,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:58:47,329 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1213#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:58:47,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:58:47,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:58:47,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-20 20:58:47,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690523219] [2022-11-20 20:58:47,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:58:47,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 20:58:47,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:58:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 20:58:47,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=656, Unknown=5, NotChecked=52, Total=812 [2022-11-20 20:58:47,332 INFO L87 Difference]: Start difference. First operand 64 states and 85 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:58:48,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:58:50,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 20:58:53,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:58:56,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:59:00,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 20:59:38,853 WARN L233 SmtUtils]: Spent 30.60s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:59:46,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:00:11,783 WARN L233 SmtUtils]: Spent 10.66s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:00:14,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:00:22,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:00:59,327 WARN L233 SmtUtils]: Spent 26.72s on a formula simplification. DAG size of input: 42 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:01:01,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:03,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:07,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:09,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:11,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:32,190 WARN L233 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 24 DAG size of output: 19 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:01:38,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:41,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:47,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:49,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:52,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:54,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:01:57,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:00,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:01,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:07,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:09,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:10,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:14,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:16,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:18,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:20,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:23,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:25,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:27,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:28,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:30,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:32,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:34,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:36,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:38,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:40,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:42,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:45,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:47,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:49,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:51,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:54,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:57,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:02:58,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:00,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:03,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:05,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:07,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:08,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:10,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:12,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:16,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.81s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:18,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:20,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:22,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:24,642 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2022-11-20 21:03:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:03:24,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-11-20 21:03:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:24,644 INFO L225 Difference]: With dead ends: 108 [2022-11-20 21:03:24,645 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 21:03:24,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 191.6s TimeCoverageRelationStatistics Valid=155, Invalid=951, Unknown=20, NotChecked=64, Total=1190 [2022-11-20 21:03:24,646 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 46 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 64 mSolverCounterUnsat, 45 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 45 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 151.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:24,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 149 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 560 Invalid, 45 Unknown, 90 Unchecked, 151.0s Time] [2022-11-20 21:03:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 21:03:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2022-11-20 21:03:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 33 states have call successors, (33), 8 states have call predecessors, (33), 8 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-20 21:03:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2022-11-20 21:03:24,695 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 24 [2022-11-20 21:03:24,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:24,695 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2022-11-20 21:03:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 21:03:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2022-11-20 21:03:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 21:03:24,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:24,697 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:24,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:24,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:24,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:24,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1707874709, now seen corresponding path program 1 times [2022-11-20 21:03:24,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:24,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81767300] [2022-11-20 21:03:24,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:24,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:24,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:03:24,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552703739] [2022-11-20 21:03:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:24,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:24,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:24,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:24,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:03:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:24,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:03:24,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 21:03:25,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:29,461 WARN L859 $PredicateComparison]: unable to prove that (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) is different from true [2022-11-20 21:03:38,077 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~q~0#1| Int) (|ULTIMATE.start_main_~r~0#1| Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1|)) 4294967296) (mod (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) 4294967296))) (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 4294967280) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~r~0#1| 12) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 16 |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~q~0#1| 4294967284) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))) is different from false [2022-11-20 21:03:39,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:03:39,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81767300] [2022-11-20 21:03:39,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:03:39,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552703739] [2022-11-20 21:03:39,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552703739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:03:39,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344883465] [2022-11-20 21:03:39,786 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-20 21:03:39,787 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:03:39,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:03:39,787 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:03:39,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:03:40,050 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-20 21:03:40,063 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2022-11-20 21:03:40,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:03:51,455 WARN L233 SmtUtils]: Spent 8.61s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:03:51,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1664#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:03:51,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:03:51,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:03:51,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-11-20 21:03:51,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294926892] [2022-11-20 21:03:51,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 21:03:51,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:03:51,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:03:51,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:03:51,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=384, Unknown=2, NotChecked=82, Total=552 [2022-11-20 21:03:51,458 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:03:53,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:57,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:03:59,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:04:01,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:04:03,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:04:06,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:04:08,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:04:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:09,906 INFO L93 Difference]: Finished difference Result 117 states and 155 transitions. [2022-11-20 21:04:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:04:09,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-11-20 21:04:09,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:09,908 INFO L225 Difference]: With dead ends: 117 [2022-11-20 21:04:09,908 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 21:04:09,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=98, Invalid=460, Unknown=2, NotChecked=90, Total=650 [2022-11-20 21:04:09,910 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:09,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 7 Unknown, 0 Unchecked, 18.4s Time] [2022-11-20 21:04:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 21:04:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-20 21:04:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-20 21:04:09,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 126 transitions. [2022-11-20 21:04:09,962 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 126 transitions. Word has length 27 [2022-11-20 21:04:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:09,962 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 126 transitions. [2022-11-20 21:04:09,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 21:04:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 126 transitions. [2022-11-20 21:04:09,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 21:04:09,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:09,964 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:09,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:10,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 21:04:10,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1110722897, now seen corresponding path program 2 times [2022-11-20 21:04:10,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:10,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440498290] [2022-11-20 21:04:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:10,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:10,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:04:10,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918868746] [2022-11-20 21:04:10,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:04:10,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:10,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:10,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:10,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:04:10,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:04:10,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:04:10,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:04:10,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-20 21:04:10,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:32,252 WARN L859 $PredicateComparison]: unable to prove that (forall ((|aux_div_aux_mod_ULTIMATE.start_main_~q~0#1_45_95| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~q~0#1_45_95| Int)) (let ((.cse1 (+ (* |aux_div_aux_mod_ULTIMATE.start_main_~q~0#1_45_95| 4294967296) |aux_mod_aux_mod_ULTIMATE.start_main_~q~0#1_45_95|)) (.cse0 (* |c_ULTIMATE.start_main_~p~0#1| 2))) (or (<= (+ .cse0 4294967296) .cse1) (<= |aux_mod_aux_mod_ULTIMATE.start_main_~q~0#1_45_95| (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296)) (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| |aux_mod_aux_mod_ULTIMATE.start_main_~q~0#1_45_95|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 4294967294)) 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 4294967294 |c_ULTIMATE.start_main_~r~0#1|) (* |aux_mod_aux_mod_ULTIMATE.start_main_~q~0#1_45_95| |c_ULTIMATE.start_main_~r~0#1|)) 4294967296)) (<= .cse1 (+ (mod |c_ULTIMATE.start_main_~n~0#1| 4294967296) .cse0)) (>= |aux_mod_aux_mod_ULTIMATE.start_main_~q~0#1_45_95| 4294967296)))) is different from true [2022-11-20 21:05:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-20 21:05:33,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:05:33,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440498290] [2022-11-20 21:05:33,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:05:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918868746] [2022-11-20 21:05:33,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918868746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1152574932] [2022-11-20 21:05:33,260 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-20 21:05:33,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:05:33,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:05:33,260 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:05:33,261 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:05:33,450 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 52 for LOIs [2022-11-20 21:05:33,533 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2022-11-20 21:05:33,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:05:49,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2214#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:05:49,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:05:49,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:05:49,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-20 21:05:49,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053382031] [2022-11-20 21:05:49,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:49,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 21:05:49,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:05:49,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 21:05:49,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=474, Unknown=2, NotChecked=44, Total=600 [2022-11-20 21:05:49,034 INFO L87 Difference]: Start difference. First operand 93 states and 126 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 21:05:52,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:05:55,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:05:57,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:03,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:05,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:11,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:12,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:14,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:16,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:18,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:21,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:23,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:25,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:26,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:28,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:30,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:32,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:34,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:36,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:38,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:41,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:43,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:06:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:44,017 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2022-11-20 21:06:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:06:44,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-11-20 21:06:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:44,020 INFO L225 Difference]: With dead ends: 111 [2022-11-20 21:06:44,020 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 21:06:44,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=97, Invalid=554, Unknown=3, NotChecked=48, Total=702 [2022-11-20 21:06:44,021 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 17 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 52.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:44,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 233 Invalid, 16 Unknown, 48 Unchecked, 52.6s Time] [2022-11-20 21:06:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 21:06:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2022-11-20 21:06:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 61 states have internal predecessors, (65), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-20 21:06:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-11-20 21:06:44,069 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 32 [2022-11-20 21:06:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:44,070 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-11-20 21:06:44,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 21:06:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-11-20 21:06:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 21:06:44,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:44,072 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:44,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 21:06:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:44,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:06:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1866596967, now seen corresponding path program 1 times [2022-11-20 21:06:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:06:44,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247544263] [2022-11-20 21:06:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:44,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:06:44,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:06:44,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995259395] [2022-11-20 21:06:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:44,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:06:44,289 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:06:44,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:06:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:44,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 21:06:44,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 21:06:45,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:15,242 WARN L233 SmtUtils]: Spent 13.57s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:07:15,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:07:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247544263] [2022-11-20 21:07:15,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 21:07:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995259395] [2022-11-20 21:07:15,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995259395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:07:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943881055] [2022-11-20 21:07:15,246 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-20 21:07:15,246 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:07:15,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:07:15,246 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:07:15,246 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:07:46,990 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-20 21:07:46,996 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 65 for LOIs [2022-11-20 21:07:47,019 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:08:07,517 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 43 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:09,523 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (<= 0 |c_#StackHeapBarrier|))) (and (<= 0 |c_#NULL.base|) (let ((.cse0 (= |c_#NULL.offset| 0)) (.cse1 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse2 (= |c_#NULL.base| 0)) (.cse3 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse4 (not (= (ite (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) 1 0) 0)))) (or (and (= |c_ULTIMATE.start_main_~p~0#1| 0) .cse0 .cse1 .cse2 .cse3 (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse4 .cse5) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) (<= 0 |c_#NULL.offset|) .cse5 (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0))) is different from false [2022-11-20 21:08:11,532 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (<= 0 |c_#StackHeapBarrier|))) (and (<= 0 |c_#NULL.base|) (<= 0 |c_#NULL.offset|) (let ((.cse0 (= |c_#NULL.offset| 0)) (.cse1 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse2 (= |c_#NULL.base| 0)) (.cse3 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse4 (not (= (ite (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) 1 0) 0))) (.cse5 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967288 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)))) (or (and (= |c_ULTIMATE.start_main_~p~0#1| 0) .cse0 .cse1 .cse2 .cse3 (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse4 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6))) .cse6 (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0))) is different from false [2022-11-20 21:08:13,540 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (<= 0 |c_#StackHeapBarrier|))) (and (let ((.cse0 (= |c_#NULL.offset| 0)) (.cse1 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse2 (= |c_#NULL.base| 0)) (.cse3 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse4 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0))) (.cse5 (not (= (ite (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) 1 0) 0))) (.cse6 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967288 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)))) (or (and (= |c_ULTIMATE.start_main_~p~0#1| 0) .cse0 .cse1 .cse2 .cse3 (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7))) (<= 0 |c_#NULL.base|) (<= 0 |c_#NULL.offset|) .cse7 (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0))) is different from false [2022-11-20 21:08:15,547 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (<= 0 |c_#StackHeapBarrier|))) (and (let ((.cse9 (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse0 (not (= (ite (= (mod (+ .cse9 .cse10 (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0))) (.cse1 (= |c_#NULL.offset| 0)) (.cse2 (not (= (ite (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod (+ (* |c_ULTIMATE.start_main_~p~0#1| 2) |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse3 (= |c_#NULL.base| 0)) (.cse4 (not (= (ite (= (mod (+ .cse9 .cse10) 4294967296) (mod (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~q~0#1|) 4294967296)) 1 0) 0))) (.cse5 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0))) (.cse6 (not (= (ite (= 0 (mod (+ (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 12 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~r~0#1| 4294967280 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~p~0#1| 16 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| 4294967284 |c_ULTIMATE.start_main_~q~0#1|) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) 1 0) 0))) (.cse7 (not (= (ite (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967288 |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967292 |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~q~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~p~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1| 4) (* 4294967295 |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~h~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1| 4 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0) 1 0) 0)))) (or (and .cse0 (= |c_ULTIMATE.start_main_~p~0#1| 0) .cse1 .cse2 .cse3 .cse4 (= |c_ULTIMATE.start_main_~h~0#1| 0) .cse5 .cse6 .cse7 .cse8) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8)))) (<= 0 |c_#NULL.base|) (<= 0 |c_#NULL.offset|) .cse8 (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0))) is different from false [2022-11-20 21:08:15,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2759#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:08:15,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:08:15,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:08:15,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-20 21:08:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905940049] [2022-11-20 21:08:15,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 21:08:15,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:08:15,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:08:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:08:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=660, Unknown=12, NotChecked=220, Total=992 [2022-11-20 21:08:15,590 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 21:08:21,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:23,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:26,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:28,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:33,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 21:08:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:33,488 INFO L93 Difference]: Finished difference Result 132 states and 166 transitions. [2022-11-20 21:08:33,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:08:33,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2022-11-20 21:08:33,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:33,490 INFO L225 Difference]: With dead ends: 132 [2022-11-20 21:08:33,490 INFO L226 Difference]: Without dead ends: 123 [2022-11-20 21:08:33,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=114, Invalid=759, Unknown=13, NotChecked=236, Total=1122 [2022-11-20 21:08:33,491 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 15 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 29 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:33,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 137 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 494 Invalid, 4 Unknown, 0 Unchecked, 15.8s Time] [2022-11-20 21:08:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-20 21:08:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-11-20 21:08:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 72 states have internal predecessors, (76), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-20 21:08:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2022-11-20 21:08:33,536 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 51 [2022-11-20 21:08:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:33,536 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2022-11-20 21:08:33,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 21:08:33,537 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2022-11-20 21:08:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 21:08:33,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:33,539 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:08:33,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:08:33,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:08:33,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:08:33,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:33,745 INFO L85 PathProgramCache]: Analyzing trace with hash -744517886, now seen corresponding path program 2 times [2022-11-20 21:08:33,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:08:33,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192618701] [2022-11-20 21:08:33,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:33,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:08:33,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 21:08:33,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941847009] [2022-11-20 21:08:33,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:08:33,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:08:33,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:08:33,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:08:33,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae55bac4-a981-4bab-aadb-757be0b67863/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:08:33,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 21:08:33,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:08:33,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:08:33,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:08:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-20 21:08:35,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:13,009 WARN L233 SmtUtils]: Spent 30.59s on a formula simplification. DAG size of input: 5909 DAG size of output: 5849 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)