./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur --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 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 --- 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-38b53e6 [2022-11-26 01:01:36,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:01:36,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:01:36,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:01:36,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:01:36,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:01:36,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:01:36,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:01:36,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:01:36,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:01:36,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:01:36,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:01:36,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:01:36,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:01:36,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:01:36,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:01:36,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:01:36,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:01:36,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:01:36,185 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:01:36,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:01:36,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:01:36,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:01:36,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:01:36,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:01:36,194 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:01:36,194 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:01:36,195 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:01:36,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:01:36,197 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:01:36,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:01:36,198 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:01:36,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:01:36,199 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:01:36,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:01:36,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:01:36,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:01:36,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:01:36,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:01:36,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:01:36,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:01:36,205 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:01:36,231 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:01:36,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:01:36,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:01:36,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:01:36,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:01:36,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:01:36,233 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:01:36,233 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:01:36,233 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:01:36,234 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:01:36,234 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:01:36,234 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:01:36,234 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:01:36,235 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:01:36,235 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:01:36,235 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:01:36,235 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:01:36,236 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:01:36,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:01:36,237 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:01:36,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:01:36,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:01:36,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:01:36,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:01:36,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:01:36,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:01:36,238 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:01:36,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:01:36,238 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:01:36,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:01:36,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:01:36,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:01:36,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:36,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:01:36,240 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:01:36,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:01:36,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:01:36,240 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:01:36,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:01:36,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:01:36,241 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:01:36,241 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_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d4ed8c57ce722a6c7368f844e0bd557207245c570ed48ded2021df85adb4676 [2022-11-26 01:01:36,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:01:36,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:01:36,507 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:01:36,508 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:01:36,509 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:01:36,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2022-11-26 01:01:39,596 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:01:39,893 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:01:39,893 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2022-11-26 01:01:39,900 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/data/6ade1c051/1fd875a5fb0d46d59c8a8155a5bcd17f/FLAG8744a8928 [2022-11-26 01:01:39,915 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/data/6ade1c051/1fd875a5fb0d46d59c8a8155a5bcd17f [2022-11-26 01:01:39,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:01:39,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:01:39,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:39,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:01:39,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:01:39,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:39" (1/1) ... [2022-11-26 01:01:39,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53361dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:39, skipping insertion in model container [2022-11-26 01:01:39,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:39" (1/1) ... [2022-11-26 01:01:39,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:01:39,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:01:40,124 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_f19a939d-8fdb-4761-85ee-05baf3b03779/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c[588,601] [2022-11-26 01:01:40,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:40,169 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:01:40,186 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_f19a939d-8fdb-4761-85ee-05baf3b03779/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound10.c[588,601] [2022-11-26 01:01:40,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:40,241 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:01:40,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40 WrapperNode [2022-11-26 01:01:40,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:40,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:40,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:01:40,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:01:40,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,313 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-11-26 01:01:40,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:40,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:01:40,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:01:40,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:01:40,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,352 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:01:40,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:01:40,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:01:40,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:01:40,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (1/1) ... [2022-11-26 01:01:40,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:40,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:40,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:01:40,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:01:40,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:01:40,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:01:40,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:01:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:01:40,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 01:01:40,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 01:01:40,533 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:01:40,540 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:01:40,808 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:01:40,847 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:01:40,847 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:01:40,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:01:40 BoogieIcfgContainer [2022-11-26 01:01:40,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:01:40,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:01:40,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:01:40,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:01:40,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:01:39" (1/3) ... [2022-11-26 01:01:40,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4b66fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:01:40, skipping insertion in model container [2022-11-26 01:01:40,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:40" (2/3) ... [2022-11-26 01:01:40,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4b66fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:01:40, skipping insertion in model container [2022-11-26 01:01:40,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:01:40" (3/3) ... [2022-11-26 01:01:40,866 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound10.c [2022-11-26 01:01:40,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:01:40,891 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:01:40,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:01:40,978 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;@2de27127, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:01:40,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:01:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-26 01:01:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 01:01:40,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:40,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 01:01:40,994 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1408153759, now seen corresponding path program 1 times [2022-11-26 01:01:41,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:41,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130474817] [2022-11-26 01:01:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:41,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:41,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:41,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:41,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130474817] [2022-11-26 01:01:41,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130474817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:41,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:41,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:01:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960666199] [2022-11-26 01:01:41,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:41,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 01:01:41,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:41,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 01:01:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:01:41,257 INFO L87 Difference]: Start difference. First operand has 23 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:41,302 INFO L93 Difference]: Finished difference Result 45 states and 82 transitions. [2022-11-26 01:01:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 01:01:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 01:01:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:41,312 INFO L225 Difference]: With dead ends: 45 [2022-11-26 01:01:41,313 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 01:01:41,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:01:41,324 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:41,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 01:01:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-26 01:01:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:01:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 32 transitions. [2022-11-26 01:01:41,369 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 32 transitions. Word has length 6 [2022-11-26 01:01:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:41,369 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 32 transitions. [2022-11-26 01:01:41,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 32 transitions. [2022-11-26 01:01:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:01:41,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:41,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:41,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:01:41,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:41,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:41,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1232571916, now seen corresponding path program 1 times [2022-11-26 01:01:41,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:41,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400109245] [2022-11-26 01:01:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:41,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:41,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:41,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400109245] [2022-11-26 01:01:41,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400109245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:41,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:41,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:01:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866249847] [2022-11-26 01:01:41,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:41,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:01:41,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:41,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:01:41,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:01:41,495 INFO L87 Difference]: Start difference. First operand 21 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:41,517 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2022-11-26 01:01:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:01:41,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 01:01:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:41,519 INFO L225 Difference]: With dead ends: 35 [2022-11-26 01:01:41,519 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 01:01:41,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:01:41,521 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:41,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:01:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 01:01:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-26 01:01:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 01:01:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2022-11-26 01:01:41,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 7 [2022-11-26 01:01:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:41,531 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-11-26 01:01:41,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2022-11-26 01:01:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 01:01:41,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:41,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:41,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:01:41,533 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1231022784, now seen corresponding path program 1 times [2022-11-26 01:01:41,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:41,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557280149] [2022-11-26 01:01:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:41,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:41,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:41,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557280149] [2022-11-26 01:01:41,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557280149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:41,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:01:41,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:01:41,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132504133] [2022-11-26 01:01:41,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:41,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:01:41,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:41,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:01:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:01:41,837 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:41,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:41,968 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-26 01:01:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:01:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 01:01:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:41,970 INFO L225 Difference]: With dead ends: 29 [2022-11-26 01:01:41,970 INFO L226 Difference]: Without dead ends: 27 [2022-11-26 01:01:41,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:01:41,972 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:41,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:01:41,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-26 01:01:41,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-26 01:01:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-11-26 01:01:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-11-26 01:01:41,987 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2022-11-26 01:01:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:41,988 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-11-26 01:01:41,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:01:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-11-26 01:01:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 01:01:41,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:41,989 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:41,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:01:41,990 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:41,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1004679035, now seen corresponding path program 1 times [2022-11-26 01:01:41,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:41,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018740776] [2022-11-26 01:01:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:41,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:42,004 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:42,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038720431] [2022-11-26 01:01:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:42,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:42,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:42,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:01:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 01:01:42,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:42,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:01:42,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:42,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018740776] [2022-11-26 01:01:42,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:42,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038720431] [2022-11-26 01:01:42,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038720431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:42,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488932982] [2022-11-26 01:01:42,555 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-26 01:01:42,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:42,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:42,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:42,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:42,806 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-26 01:01:42,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:43,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [488932982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:43,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:01:43,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-26 01:01:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831495108] [2022-11-26 01:01:43,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:43,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:01:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:01:43,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:01:43,361 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 01:01:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:43,790 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2022-11-26 01:01:43,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:01:43,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-26 01:01:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:43,794 INFO L225 Difference]: With dead ends: 49 [2022-11-26 01:01:43,794 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 01:01:43,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:01:43,799 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:43,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 87 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:01:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 01:01:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-26 01:01:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-26 01:01:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2022-11-26 01:01:43,835 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 12 [2022-11-26 01:01:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:43,836 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2022-11-26 01:01:43,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 01:01:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2022-11-26 01:01:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 01:01:43,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:43,839 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:43,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 01:01:44,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:44,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:44,044 INFO L85 PathProgramCache]: Analyzing trace with hash 204620983, now seen corresponding path program 1 times [2022-11-26 01:01:44,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:44,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610734340] [2022-11-26 01:01:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:44,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:44,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:44,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107391778] [2022-11-26 01:01:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:44,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:44,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:44,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:01:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:44,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 01:01:44,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 01:01:44,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-26 01:01:44,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:44,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610734340] [2022-11-26 01:01:44,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:44,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107391778] [2022-11-26 01:01:44,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107391778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:44,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1924714302] [2022-11-26 01:01:44,319 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 01:01:44,319 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:44,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:44,320 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:44,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:48,619 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:01:48,624 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:49,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '790#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:01:49,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:49,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:01:49,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-26 01:01:49,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126766656] [2022-11-26 01:01:49,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:49,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:01:49,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:49,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:01:49,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:01:49,812 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:01:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:50,062 INFO L93 Difference]: Finished difference Result 107 states and 144 transitions. [2022-11-26 01:01:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:01:50,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 40 [2022-11-26 01:01:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:50,064 INFO L225 Difference]: With dead ends: 107 [2022-11-26 01:01:50,064 INFO L226 Difference]: Without dead ends: 91 [2022-11-26 01:01:50,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-26 01:01:50,066 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 51 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:50,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 232 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:01:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-26 01:01:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-11-26 01:01:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-26 01:01:50,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2022-11-26 01:01:50,093 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 40 [2022-11-26 01:01:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:50,093 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2022-11-26 01:01:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:01:50,094 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2022-11-26 01:01:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 01:01:50,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:50,095 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:50,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:50,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:50,302 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash 696736299, now seen corresponding path program 1 times [2022-11-26 01:01:50,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:50,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491209238] [2022-11-26 01:01:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:50,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:50,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426241422] [2022-11-26 01:01:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:50,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:50,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:50,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:50,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:01:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:50,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 01:01:50,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 01:01:50,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 01:01:50,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:50,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491209238] [2022-11-26 01:01:50,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:50,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426241422] [2022-11-26 01:01:50,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426241422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:50,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149775411] [2022-11-26 01:01:50,648 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:01:50,648 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:50,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:50,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:50,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:53,634 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:01:53,644 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:56,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1361#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:01:56,434 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:01:56,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:01:56,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-26 01:01:56,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681526298] [2022-11-26 01:01:56,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:56,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:01:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:01:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-11-26 01:01:56,436 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 01:01:57,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:57,403 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2022-11-26 01:01:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:01:57,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 40 [2022-11-26 01:01:57,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:57,406 INFO L225 Difference]: With dead ends: 105 [2022-11-26 01:01:57,406 INFO L226 Difference]: Without dead ends: 103 [2022-11-26 01:01:57,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2022-11-26 01:01:57,407 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:57,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 61 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:01:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-26 01:01:57,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-26 01:01:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 55 states have internal predecessors, (59), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-26 01:01:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 132 transitions. [2022-11-26 01:01:57,439 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 132 transitions. Word has length 40 [2022-11-26 01:01:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:57,439 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 132 transitions. [2022-11-26 01:01:57,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 01:01:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 132 transitions. [2022-11-26 01:01:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 01:01:57,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:57,441 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:57,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:57,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 01:01:57,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1539244486, now seen corresponding path program 2 times [2022-11-26 01:01:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:57,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796350332] [2022-11-26 01:01:57,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:57,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:57,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:01:57,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901353461] [2022-11-26 01:01:57,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:01:57,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:57,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:57,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:01:57,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:01:57,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:01:57,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 01:01:57,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-26 01:01:57,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-26 01:01:57,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:57,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796350332] [2022-11-26 01:01:57,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:01:57,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901353461] [2022-11-26 01:01:57,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901353461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:57,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1703991300] [2022-11-26 01:01:57,912 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:01:57,912 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:57,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:57,913 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:57,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:00,901 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:02:00,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:03,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1973#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:03,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:03,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:03,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-26 01:02:03,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417684749] [2022-11-26 01:02:03,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:03,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 01:02:03,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 01:02:03,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:02:03,937 INFO L87 Difference]: Start difference. First operand 103 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-26 01:02:04,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:04,134 INFO L93 Difference]: Finished difference Result 117 states and 143 transitions. [2022-11-26 01:02:04,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:02:04,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2022-11-26 01:02:04,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:04,136 INFO L225 Difference]: With dead ends: 117 [2022-11-26 01:02:04,136 INFO L226 Difference]: Without dead ends: 115 [2022-11-26 01:02:04,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:02:04,138 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:04,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 186 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-26 01:02:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-26 01:02:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 64 states have internal predecessors, (68), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-26 01:02:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2022-11-26 01:02:04,167 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 45 [2022-11-26 01:02:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:04,168 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2022-11-26 01:02:04,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-26 01:02:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2022-11-26 01:02:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 01:02:04,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:04,170 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:04,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:04,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:04,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash -375151797, now seen corresponding path program 3 times [2022-11-26 01:02:04,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:04,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154746683] [2022-11-26 01:02:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:04,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:04,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:02:04,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683463468] [2022-11-26 01:02:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:02:04,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:04,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:04,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:02:04,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:02:04,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:04,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 01:02:04,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-26 01:02:04,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:05,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154746683] [2022-11-26 01:02:05,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:02:05,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683463468] [2022-11-26 01:02:05,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683463468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:05,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447116192] [2022-11-26 01:02:05,013 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:02:05,014 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:05,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:05,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:05,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:08,172 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:02:08,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:09,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2608#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:09,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:09,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:09,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-11-26 01:02:09,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303488262] [2022-11-26 01:02:09,032 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:02:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:02:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-26 01:02:09,034 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 01:02:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:09,377 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2022-11-26 01:02:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:02:09,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-11-26 01:02:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:09,379 INFO L225 Difference]: With dead ends: 125 [2022-11-26 01:02:09,379 INFO L226 Difference]: Without dead ends: 120 [2022-11-26 01:02:09,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-11-26 01:02:09,380 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:09,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:02:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-26 01:02:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-26 01:02:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 70 states have internal predecessors, (74), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-26 01:02:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-11-26 01:02:09,408 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 50 [2022-11-26 01:02:09,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:09,408 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-11-26 01:02:09,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 01:02:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-11-26 01:02:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 01:02:09,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:09,410 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:09,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:09,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:09,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash 780075682, now seen corresponding path program 1 times [2022-11-26 01:02:09,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138479743] [2022-11-26 01:02:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:09,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:09,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:02:09,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170458739] [2022-11-26 01:02:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:09,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:09,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:09,632 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:09,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:02:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 01:02:09,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-26 01:02:10,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-26 01:02:10,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138479743] [2022-11-26 01:02:10,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:02:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170458739] [2022-11-26 01:02:10,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170458739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:10,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [962836000] [2022-11-26 01:02:10,803 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 01:02:10,804 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:10,804 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:10,804 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:10,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:14,245 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:02:14,250 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:15,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3390#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:15,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:15,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:15,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-26 01:02:15,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531573654] [2022-11-26 01:02:15,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:15,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 01:02:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 01:02:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-26 01:02:15,406 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-26 01:02:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:16,430 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2022-11-26 01:02:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:02:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 66 [2022-11-26 01:02:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:16,434 INFO L225 Difference]: With dead ends: 136 [2022-11-26 01:02:16,434 INFO L226 Difference]: Without dead ends: 132 [2022-11-26 01:02:16,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:02:16,435 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:16,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:02:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-26 01:02:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-11-26 01:02:16,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 75 states have (on average 1.08) internal successors, (81), 78 states have internal predecessors, (81), 37 states have call successors, (37), 20 states have call predecessors, (37), 19 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 01:02:16,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2022-11-26 01:02:16,479 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 66 [2022-11-26 01:02:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:16,480 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2022-11-26 01:02:16,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-26 01:02:16,480 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2022-11-26 01:02:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 01:02:16,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:16,482 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:16,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 01:02:16,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:16,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1686864157, now seen corresponding path program 1 times [2022-11-26 01:02:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283126085] [2022-11-26 01:02:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:16,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:16,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:02:16,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140619218] [2022-11-26 01:02:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:16,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:16,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:16,699 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:16,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:02:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:02:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-26 01:02:16,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:17,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:17,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283126085] [2022-11-26 01:02:17,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:02:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140619218] [2022-11-26 01:02:17,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140619218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413045394] [2022-11-26 01:02:17,181 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 01:02:17,185 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:17,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:17,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:17,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:19,826 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2022-11-26 01:02:19,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:30,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4163#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:30,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:30,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:30,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-26 01:02:30,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744313576] [2022-11-26 01:02:30,137 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:30,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:02:30,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:30,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:02:30,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-26 01:02:30,138 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:02:30,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:30,558 INFO L93 Difference]: Finished difference Result 134 states and 153 transitions. [2022-11-26 01:02:30,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:02:30,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2022-11-26 01:02:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:30,560 INFO L225 Difference]: With dead ends: 134 [2022-11-26 01:02:30,560 INFO L226 Difference]: Without dead ends: 123 [2022-11-26 01:02:30,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-11-26 01:02:30,561 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:30,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 62 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:02:30,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-26 01:02:30,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-26 01:02:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 73 states have internal predecessors, (75), 34 states have call successors, (34), 18 states have call predecessors, (34), 18 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-26 01:02:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 141 transitions. [2022-11-26 01:02:30,597 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 141 transitions. Word has length 71 [2022-11-26 01:02:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:30,598 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 141 transitions. [2022-11-26 01:02:30,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-26 01:02:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 141 transitions. [2022-11-26 01:02:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 01:02:30,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:30,600 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-26 01:02:30,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:30,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:02:30,806 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:30,806 INFO L85 PathProgramCache]: Analyzing trace with hash -226115244, now seen corresponding path program 4 times [2022-11-26 01:02:30,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:30,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833518015] [2022-11-26 01:02:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:30,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:30,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:02:30,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968202222] [2022-11-26 01:02:30,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:02:30,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:30,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:30,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:02:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-26 01:02:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-26 01:02:31,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 52 proven. 50 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-26 01:02:31,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:31,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833518015] [2022-11-26 01:02:31,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:02:31,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968202222] [2022-11-26 01:02:31,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968202222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:31,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464244021] [2022-11-26 01:02:31,560 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:02:31,561 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:31,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:31,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:31,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:33,965 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:02:33,969 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:42,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5008#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:42,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:42,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:42,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-26 01:02:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966009858] [2022-11-26 01:02:42,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:42,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 01:02:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:42,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 01:02:42,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2022-11-26 01:02:42,706 INFO L87 Difference]: Start difference. First operand 123 states and 141 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-26 01:02:45,776 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 [] [2022-11-26 01:02:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:48,200 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2022-11-26 01:02:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 01:02:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 73 [2022-11-26 01:02:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:48,201 INFO L225 Difference]: With dead ends: 154 [2022-11-26 01:02:48,202 INFO L226 Difference]: Without dead ends: 152 [2022-11-26 01:02:48,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 01:02:48,203 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 33 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:48,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 95 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 607 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-26 01:02:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-26 01:02:48,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 131. [2022-11-26 01:02:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 79 states have internal predecessors, (81), 34 states have call successors, (34), 20 states have call predecessors, (34), 20 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-26 01:02:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 147 transitions. [2022-11-26 01:02:48,257 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 147 transitions. Word has length 73 [2022-11-26 01:02:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:48,257 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 147 transitions. [2022-11-26 01:02:48,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-26 01:02:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 147 transitions. [2022-11-26 01:02:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 01:02:48,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:48,259 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2022-11-26 01:02:48,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:48,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:02:48,466 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash -750862223, now seen corresponding path program 5 times [2022-11-26 01:02:48,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:48,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621248003] [2022-11-26 01:02:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:48,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:48,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:02:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796465274] [2022-11-26 01:02:48,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:02:48,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:48,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:48,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:48,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:02:48,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:02:48,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:48,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 01:02:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-26 01:02:48,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-26 01:02:49,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621248003] [2022-11-26 01:02:49,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:02:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796465274] [2022-11-26 01:02:49,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796465274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:49,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363914845] [2022-11-26 01:02:49,687 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 01:02:49,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:49,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:49,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:49,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:52,183 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:02:52,187 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:57,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5938#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:57,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:57,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:02:57,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-26 01:02:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358273041] [2022-11-26 01:02:57,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:57,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 01:02:57,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:57,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 01:02:57,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2022-11-26 01:02:57,795 INFO L87 Difference]: Start difference. First operand 131 states and 147 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-26 01:03:04,525 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 [] [2022-11-26 01:03:04,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:04,649 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2022-11-26 01:03:04,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 01:03:04,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 78 [2022-11-26 01:03:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:04,651 INFO L225 Difference]: With dead ends: 142 [2022-11-26 01:03:04,651 INFO L226 Difference]: Without dead ends: 133 [2022-11-26 01:03:04,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:03:04,653 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:04,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-26 01:03:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-26 01:03:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-11-26 01:03:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 83 states have internal predecessors, (85), 29 states have call successors, (29), 22 states have call predecessors, (29), 21 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-26 01:03:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2022-11-26 01:03:04,697 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 78 [2022-11-26 01:03:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:04,698 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2022-11-26 01:03:04,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-26 01:03:04,698 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2022-11-26 01:03:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-26 01:03:04,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:04,700 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:04,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:04,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:04,906 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1857500541, now seen corresponding path program 2 times [2022-11-26 01:03:04,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:04,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114432179] [2022-11-26 01:03:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:04,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:04,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:03:04,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272753722] [2022-11-26 01:03:04,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:03:04,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:04,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:04,915 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:04,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:03:04,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:03:04,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:03:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 01:03:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 107 proven. 41 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-11-26 01:03:05,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:06,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:06,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114432179] [2022-11-26 01:03:06,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:03:06,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272753722] [2022-11-26 01:03:06,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272753722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:06,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439055912] [2022-11-26 01:03:06,439 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 01:03:06,439 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:06,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:06,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:06,440 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:09,014 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2022-11-26 01:03:09,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:15,630 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6794#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:03:15,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:15,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:03:15,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-26 01:03:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425938006] [2022-11-26 01:03:15,631 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 01:03:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:15,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 01:03:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-11-26 01:03:15,632 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-26 01:03:16,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:16,187 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2022-11-26 01:03:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:03:16,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 99 [2022-11-26 01:03:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:16,189 INFO L225 Difference]: With dead ends: 134 [2022-11-26 01:03:16,189 INFO L226 Difference]: Without dead ends: 123 [2022-11-26 01:03:16,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 01:03:16,190 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:16,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 92 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:03:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-26 01:03:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-26 01:03:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 78 states have internal predecessors, (79), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-26 01:03:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-11-26 01:03:16,221 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 99 [2022-11-26 01:03:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:16,221 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-11-26 01:03:16,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-26 01:03:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-11-26 01:03:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-26 01:03:16,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:16,224 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:16,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:16,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 01:03:16,425 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:16,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2067588009, now seen corresponding path program 2 times [2022-11-26 01:03:16,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:16,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205111884] [2022-11-26 01:03:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:16,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:16,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:03:16,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599463865] [2022-11-26 01:03:16,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:03:16,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:16,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:16,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:03:16,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-26 01:03:16,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:03:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:03:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-26 01:03:17,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-11-26 01:03:17,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205111884] [2022-11-26 01:03:17,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:03:17,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599463865] [2022-11-26 01:03:17,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599463865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:17,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560347154] [2022-11-26 01:03:17,273 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 01:03:17,274 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:17,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:17,274 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:17,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:19,877 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:03:19,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:24,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7930#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:03:24,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:24,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:03:24,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-26 01:03:24,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592759579] [2022-11-26 01:03:24,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 01:03:24,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 01:03:24,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-11-26 01:03:24,961 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2022-11-26 01:03:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:25,655 INFO L93 Difference]: Finished difference Result 365 states and 397 transitions. [2022-11-26 01:03:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:03:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 124 [2022-11-26 01:03:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:25,658 INFO L225 Difference]: With dead ends: 365 [2022-11-26 01:03:25,659 INFO L226 Difference]: Without dead ends: 351 [2022-11-26 01:03:25,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 01:03:25,660 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 158 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:25,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 260 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:03:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-26 01:03:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 284. [2022-11-26 01:03:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 172 states have (on average 1.058139534883721) internal successors, (182), 180 states have internal predecessors, (182), 65 states have call successors, (65), 46 states have call predecessors, (65), 46 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2022-11-26 01:03:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 310 transitions. [2022-11-26 01:03:25,758 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 310 transitions. Word has length 124 [2022-11-26 01:03:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:25,766 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 310 transitions. [2022-11-26 01:03:25,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2022-11-26 01:03:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 310 transitions. [2022-11-26 01:03:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-26 01:03:25,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:25,769 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:25,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:25,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:25,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:25,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1367105815, now seen corresponding path program 3 times [2022-11-26 01:03:25,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:25,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628388982] [2022-11-26 01:03:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:25,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:03:25,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421531907] [2022-11-26 01:03:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:03:25,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:25,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:25,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:25,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:03:27,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:03:27,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:03:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-26 01:03:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 250 proven. 126 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2022-11-26 01:03:28,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 171 proven. 17 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2022-11-26 01:03:31,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:31,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628388982] [2022-11-26 01:03:31,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:03:31,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421531907] [2022-11-26 01:03:31,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421531907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:31,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892901745] [2022-11-26 01:03:31,294 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 01:03:31,295 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:31,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:31,295 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:31,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:34,828 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-26 01:03:34,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:40,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9660#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:03:40,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:40,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:03:40,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-11-26 01:03:40,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927559638] [2022-11-26 01:03:40,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:40,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 01:03:40,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:40,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 01:03:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-11-26 01:03:40,346 INFO L87 Difference]: Start difference. First operand 284 states and 310 transitions. Second operand has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-26 01:03:41,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:41,837 INFO L93 Difference]: Finished difference Result 296 states and 322 transitions. [2022-11-26 01:03:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:03:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) Word has length 127 [2022-11-26 01:03:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:41,839 INFO L225 Difference]: With dead ends: 296 [2022-11-26 01:03:41,840 INFO L226 Difference]: Without dead ends: 292 [2022-11-26 01:03:41,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 01:03:41,841 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:41,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 63 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:03:41,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-26 01:03:41,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-11-26 01:03:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 177 states have (on average 1.0508474576271187) internal successors, (186), 184 states have internal predecessors, (186), 66 states have call successors, (66), 48 states have call predecessors, (66), 47 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-11-26 01:03:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 316 transitions. [2022-11-26 01:03:41,941 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 316 transitions. Word has length 127 [2022-11-26 01:03:41,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:41,942 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 316 transitions. [2022-11-26 01:03:41,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) [2022-11-26 01:03:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 316 transitions. [2022-11-26 01:03:41,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-26 01:03:41,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:41,944 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:41,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:42,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:03:42,159 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash -35260082, now seen corresponding path program 1 times [2022-11-26 01:03:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850414570] [2022-11-26 01:03:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:42,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:03:42,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875025532] [2022-11-26 01:03:42,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:42,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:42,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:42,171 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:42,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:03:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:42,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-26 01:03:42,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-26 01:03:44,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-11-26 01:03:57,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850414570] [2022-11-26 01:03:57,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 01:03:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875025532] [2022-11-26 01:03:57,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875025532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:57,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589593876] [2022-11-26 01:03:57,366 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-26 01:03:57,366 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:57,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:57,367 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:57,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:59,855 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-26 01:03:59,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:04:20,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11325#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:04:20,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:04:20,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:04:20,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-11-26 01:04:20,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747690204] [2022-11-26 01:04:20,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:04:20,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 01:04:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 01:04:20,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=870, Unknown=3, NotChecked=0, Total=1056 [2022-11-26 01:04:20,188 INFO L87 Difference]: Start difference. First operand 291 states and 316 transitions. Second operand has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) [2022-11-26 01:04:58,806 WARN L233 SmtUtils]: Spent 33.74s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:00,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:03,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.40s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:06,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:09,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:19,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:21,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 01:05:24,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:25,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:29,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-11-26 01:05:31,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:33,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:05:43,689 WARN L233 SmtUtils]: Spent 7.77s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:47,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:12,735 WARN L233 SmtUtils]: Spent 14.24s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:14,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:17,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:19,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:21,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.35s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:23,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:26,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:29,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:31,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:42,622 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:45,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-26 01:06:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:06:45,776 INFO L93 Difference]: Finished difference Result 309 states and 338 transitions. [2022-11-26 01:06:45,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 01:06:45,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) Word has length 132 [2022-11-26 01:06:45,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:06:45,778 INFO L225 Difference]: With dead ends: 309 [2022-11-26 01:06:45,779 INFO L226 Difference]: Without dead ends: 291 [2022-11-26 01:06:45,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 361 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 121.0s TimeCoverageRelationStatistics Valid=312, Invalid=1319, Unknown=9, NotChecked=0, Total=1640 [2022-11-26 01:06:45,780 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 71 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:06:45,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 125 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 771 Invalid, 19 Unknown, 0 Unchecked, 53.1s Time] [2022-11-26 01:06:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-26 01:06:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2022-11-26 01:06:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 182 states have internal predecessors, (184), 61 states have call successors, (61), 49 states have call predecessors, (61), 48 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-26 01:06:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 304 transitions. [2022-11-26 01:06:45,927 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 304 transitions. Word has length 132 [2022-11-26 01:06:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:06:45,927 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 304 transitions. [2022-11-26 01:06:45,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 10 states have call predecessors, (46), 11 states have call successors, (46) [2022-11-26 01:06:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 304 transitions. [2022-11-26 01:06:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-11-26 01:06:45,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:06:45,931 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:06:45,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:06:46,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 01:06:46,138 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:06:46,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:06:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash 84841868, now seen corresponding path program 2 times [2022-11-26 01:06:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:06:46,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604740173] [2022-11-26 01:06:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:06:46,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:06:46,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 01:06:46,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942085865] [2022-11-26 01:06:46,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:06:46,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:06:46,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:06:46,154 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:06:46,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f19a939d-8fdb-4761-85ee-05baf3b03779/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:06:51,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 01:06:51,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:06:51,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-26 01:06:51,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:32,557 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse10 (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~x~0#1|) 6)) (.cse11 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse12 (* 15 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (.cse2 (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~x~0#1|) 2)) (.cse4 (* 6 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse5 (* (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~x~0#1|) 6)) (.cse3 (* 3 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (.cse1 (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~n~0#1|))) (and (= (+ (* .cse0 2) (* .cse1 14) .cse2 (* |c_ULTIMATE.start_main_~y~0#1| 8) .cse3 .cse4 .cse5 (* .cse6 6) (* |c_ULTIMATE.start_main_~x~0#1| 4)) (+ .cse7 (* .cse8 2) .cse9 7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) .cse10 (* .cse11 6) .cse12 (* |c_ULTIMATE.start_main_~n~0#1| 12))) (let ((.cse13 (- |c_ULTIMATE.start_main_~a~0#1|))) (or (and (<= 0 (+ 65536 |c_ULTIMATE.start_main_~a~0#1|)) (<= (+ |c_ULTIMATE.start_main_~a~0#1| (* 65536 (div (+ .cse13 (- 32769)) 65536)) 65537) 0) (< |c_ULTIMATE.start_main_~a~0#1| 0)) (and (<= (+ 32769 |c_ULTIMATE.start_main_~a~0#1| (* 65536 (div (+ (- 1) .cse13) 65536))) 0) (<= 0 |c_ULTIMATE.start_main_~a~0#1|) (< |c_ULTIMATE.start_main_~a~0#1| 65536)))) (= (+ .cse7 .cse9 .cse8 .cse10 (* .cse11 3) 3 .cse12 (* |c_ULTIMATE.start_main_~n~0#1| 6) .cse3 (* |c_ULTIMATE.start_main_~x~0#1| 16)) (+ .cse0 (* .cse6 3) .cse2 .cse4 .cse5 (* |c_ULTIMATE.start_main_~y~0#1| 3) (* .cse1 16))) (<= |c_ULTIMATE.start_main_~n~0#1| (+ |c_ULTIMATE.start_main_~a~0#1| 1)) (= (+ |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~z~0#1| .cse3) (+ |c_ULTIMATE.start_main_~y~0#1| .cse1 5 (* |c_ULTIMATE.start_main_~n~0#1| 3))))) is different from false [2022-11-26 01:08:18,038 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:08:37,519 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:09:02,070 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:09:11,740 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:09:18,136 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (div (- |c_ULTIMATE.start_main_~z~0#1|) (- 6)))) (let ((.cse7 (* (* .cse0 .cse0 .cse0 .cse0) 60)) (.cse8 (* (* |c_ULTIMATE.start_main_~x~0#1| .cse0 .cse0) 12)) (.cse9 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~y~0#1| .cse0)) (.cse10 (* .cse0 .cse0 .cse0 .cse0 .cse0 .cse0)) (.cse11 (* .cse0 .cse0)) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| .cse0 .cse0 .cse0)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|)) (.cse2 (* .cse0 .cse0 .cse0)) (.cse4 (* 2 (* |c_ULTIMATE.start_main_~x~0#1| .cse0 .cse0 .cse0))) (.cse5 (* 12 (* .cse0 .cse0 .cse0 .cse0 .cse0))) (.cse6 (* (* |c_ULTIMATE.start_main_~x~0#1| .cse0) 24)) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| .cse0 .cse0))) (and (<= .cse0 (+ |c_ULTIMATE.start_main_~a~0#1| 2)) (= (+ (* 12 .cse1) (* 154 .cse2) (* .cse3 2) .cse4 .cse5 .cse6 (* |c_ULTIMATE.start_main_~y~0#1| 22) (* .cse0 120)) (+ .cse7 .cse8 .cse9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~x~0#1| 10) .cse10 (* .cse11 204) (* 2 .cse12) 28 (* .cse13 24))) (= (mod (* 5 |c_ULTIMATE.start_main_~z~0#1|) 6) 0) (let ((.cse14 (- |c_ULTIMATE.start_main_~a~0#1|))) (or (and (<= 0 (+ 65536 |c_ULTIMATE.start_main_~a~0#1|)) (<= (+ |c_ULTIMATE.start_main_~a~0#1| (* 65536 (div (+ .cse14 (- 32769)) 65536)) 65537) 0) (< |c_ULTIMATE.start_main_~a~0#1| 0)) (and (<= (+ 32769 |c_ULTIMATE.start_main_~a~0#1| (* 65536 (div (+ (- 1) .cse14) 65536))) 0) (<= 0 |c_ULTIMATE.start_main_~a~0#1|) (< |c_ULTIMATE.start_main_~a~0#1| 65536)))) (= (+ |c_ULTIMATE.start_main_~x~0#1| 2 |c_ULTIMATE.start_main_~z~0#1| (* .cse11 6)) (+ |c_ULTIMATE.start_main_~y~0#1| (* 12 .cse0) .cse2)) (= (+ .cse7 .cse8 (* |c_ULTIMATE.start_main_~x~0#1| 30) .cse9 (* .cse13 12) .cse10 (* .cse11 216) 38 .cse12) (+ .cse3 (* 156 .cse2) (* |c_ULTIMATE.start_main_~y~0#1| 10) (* 144 .cse0) .cse4 .cse5 .cse6 (* 6 .cse1)))))) is different from false [2022-11-26 01:09:59,530 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:12:09,748 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:12:19,433 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:12:29,800 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:12:39,863 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:13:01,215 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:13:10,784 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:13:29,690 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:13:48,848 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 01:14:36,595 WARN L233 SmtUtils]: Spent 8.98s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:42,785 WARN L233 SmtUtils]: Spent 29.79s on a formula simplification. DAG size of input: 132 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)