./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh --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 c533ab673c7ac44f09cf312108422da4b4eb94a047fb46aaa19b12fad5dce8e7 --- 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-2329fc7 [2022-12-14 07:19:53,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:19:53,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:19:53,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:19:53,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:19:53,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:19:53,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:19:53,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:19:53,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:19:53,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:19:53,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:19:53,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:19:53,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:19:53,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:19:53,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:19:53,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:19:53,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:19:53,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:19:53,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:19:53,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:19:53,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:19:53,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:19:53,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:19:53,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:19:53,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:19:53,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:19:53,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:19:53,059 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:19:53,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:19:53,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:19:53,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:19:53,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:19:53,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:19:53,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:19:53,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:19:53,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:19:53,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:19:53,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:19:53,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:19:53,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:19:53,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:19:53,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:19:53,089 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:19:53,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:19:53,089 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:19:53,089 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:19:53,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:19:53,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:19:53,090 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:19:53,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:19:53,090 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:19:53,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:19:53,091 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:19:53,091 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:19:53,091 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:19:53,091 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:19:53,091 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:19:53,092 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:19:53,092 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:19:53,092 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:19:53,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:19:53,093 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:19:53,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:19:53,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:19:53,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:19:53,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:19:53,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:19:53,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:19:53,094 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:19:53,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:19:53,094 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:19:53,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:19:53,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:19:53,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:19:53,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:19:53,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:19:53,095 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:19:53,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:19:53,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:19:53,095 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:19:53,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:19:53,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:19:53,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:19:53,096 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_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c533ab673c7ac44f09cf312108422da4b4eb94a047fb46aaa19b12fad5dce8e7 [2022-12-14 07:19:53,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:19:53,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:19:53,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:19:53,299 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:19:53,299 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:19:53,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i [2022-12-14 07:19:55,915 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:19:56,056 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:19:56,057 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i [2022-12-14 07:19:56,063 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/data/6f34cb740/eaa26fdb2921495d89f8a00ce3669ca7/FLAG79a702013 [2022-12-14 07:19:56,074 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/data/6f34cb740/eaa26fdb2921495d89f8a00ce3669ca7 [2022-12-14 07:19:56,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:19:56,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:19:56,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:19:56,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:19:56,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:19:56,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e744a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56, skipping insertion in model container [2022-12-14 07:19:56,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:19:56,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:19:56,249 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_d6dbef18-0b75-48e5-93f3-f7088213dccb/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i[951,964] [2022-12-14 07:19:56,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:19:56,266 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:19:56,276 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_d6dbef18-0b75-48e5-93f3-f7088213dccb/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound20.i[951,964] [2022-12-14 07:19:56,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:19:56,291 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:19:56,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56 WrapperNode [2022-12-14 07:19:56,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:19:56,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:19:56,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:19:56,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:19:56,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,305 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,322 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2022-12-14 07:19:56,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:19:56,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:19:56,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:19:56,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:19:56,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:19:56,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:19:56,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:19:56,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:19:56,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (1/1) ... [2022-12-14 07:19:56,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:19:56,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:56,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:19:56,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:19:56,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:19:56,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:19:56,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:19:56,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:19:56,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 07:19:56,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 07:19:56,469 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:19:56,471 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:19:56,580 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:19:56,619 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:19:56,619 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 07:19:56,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:19:56 BoogieIcfgContainer [2022-12-14 07:19:56,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:19:56,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:19:56,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:19:56,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:19:56,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:19:56" (1/3) ... [2022-12-14 07:19:56,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34032781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:19:56, skipping insertion in model container [2022-12-14 07:19:56,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:56" (2/3) ... [2022-12-14 07:19:56,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34032781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:19:56, skipping insertion in model container [2022-12-14 07:19:56,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:19:56" (3/3) ... [2022-12-14 07:19:56,630 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound20.i [2022-12-14 07:19:56,649 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:19:56,649 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:19:56,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:19:56,705 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;@4d86f6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:19:56,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:19:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:19:56,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:19:56,716 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:56,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:56,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1881233236, now seen corresponding path program 1 times [2022-12-14 07:19:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:56,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133644001] [2022-12-14 07:19:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:56,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:56,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133644001] [2022-12-14 07:19:56,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 07:19:56,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676107678] [2022-12-14 07:19:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:56,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:56,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:56,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:56,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:19:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:56,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 07:19:56,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:56,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:56,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676107678] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:56,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:56,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:19:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440937820] [2022-12-14 07:19:56,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:56,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:19:56,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:56,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:19:56,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:19:56,928 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-12-14 07:19:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:56,955 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2022-12-14 07:19:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:19:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-12-14 07:19:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:56,965 INFO L225 Difference]: With dead ends: 27 [2022-12-14 07:19:56,965 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 07:19:56,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:19:56,971 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:56,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:19:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 07:19:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 07:19:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 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) [2022-12-14 07:19:57,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 07:19:57,007 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-12-14 07:19:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:57,007 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 07:19:57,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-12-14 07:19:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 07:19:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:19:57,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:57,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:57,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:19:57,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 07:19:57,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:57,213 INFO L85 PathProgramCache]: Analyzing trace with hash -515868340, now seen corresponding path program 1 times [2022-12-14 07:19:57,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:57,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649490417] [2022-12-14 07:19:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:57,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:57,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:19:57,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094427224] [2022-12-14 07:19:57,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:57,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:57,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:57,286 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:57,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:19:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 07:19:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:57,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:57,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649490417] [2022-12-14 07:19:57,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:19:57,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094427224] [2022-12-14 07:19:57,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094427224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:57,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:57,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:19:57,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409707630] [2022-12-14 07:19:57,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:57,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:19:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:19:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:19:57,536 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-12-14 07:19:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:57,597 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-12-14 07:19:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:19:57,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2022-12-14 07:19:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:57,598 INFO L225 Difference]: With dead ends: 25 [2022-12-14 07:19:57,599 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 07:19:57,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:19:57,600 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:57,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:19:57,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 07:19:57,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 07:19:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:19:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-12-14 07:19:57,605 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 8 [2022-12-14 07:19:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:57,606 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-12-14 07:19:57,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-12-14 07:19:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-12-14 07:19:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:19:57,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:57,607 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:57,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:19:57,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:57,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash -965242393, now seen corresponding path program 1 times [2022-12-14 07:19:57,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:57,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478801543] [2022-12-14 07:19:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:57,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:57,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:19:57,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189316341] [2022-12-14 07:19:57,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:57,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:57,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:57,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:57,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:19:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:57,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:19:57,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:57,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:20:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:20:00,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:00,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478801543] [2022-12-14 07:20:00,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:20:00,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189316341] [2022-12-14 07:20:00,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189316341] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:00,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:00,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-12-14 07:20:00,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16984876] [2022-12-14 07:20:00,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:00,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:20:00,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:00,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:20:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-12-14 07:20:00,148 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-12-14 07:20:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:00,224 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-12-14 07:20:00,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:20:00,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2022-12-14 07:20:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:00,226 INFO L225 Difference]: With dead ends: 32 [2022-12-14 07:20:00,226 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 07:20:00,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=28, Invalid=81, Unknown=1, NotChecked=0, Total=110 [2022-12-14 07:20:00,227 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:00,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:20:00,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 07:20:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-12-14 07:20:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:20:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-14 07:20:00,235 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2022-12-14 07:20:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:00,236 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-14 07:20:00,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-12-14 07:20:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-14 07:20:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:20:00,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:00,237 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:00,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 07:20:00,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 07:20:00,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash -969972797, now seen corresponding path program 1 times [2022-12-14 07:20:00,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:00,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164104127] [2022-12-14 07:20:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:00,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:00,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:20:00,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957495082] [2022-12-14 07:20:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:00,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:00,474 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:00,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:20:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:00,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:20:00,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:20:00,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:00,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:00,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164104127] [2022-12-14 07:20:00,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:20:00,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957495082] [2022-12-14 07:20:00,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957495082] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:00,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:20:00,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:20:00,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932111102] [2022-12-14 07:20:00,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:00,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:20:00,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:20:00,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:20:00,539 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:20:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:00,561 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-12-14 07:20:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:20:00,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 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 15 [2022-12-14 07:20:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:00,562 INFO L225 Difference]: With dead ends: 35 [2022-12-14 07:20:00,562 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 07:20:00,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:20:00,564 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:00,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:20:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 07:20:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 07:20:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:20:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-12-14 07:20:00,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-12-14 07:20:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:00,572 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-12-14 07:20:00,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:20:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-12-14 07:20:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:20:00,573 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:00,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:00,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:20:00,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:00,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash -425494840, now seen corresponding path program 1 times [2022-12-14 07:20:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210806170] [2022-12-14 07:20:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:00,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:00,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:20:00,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41494748] [2022-12-14 07:20:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:00,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:00,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:00,829 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:00,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:20:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:00,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:20:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:20:01,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:20:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:20:03,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210806170] [2022-12-14 07:20:03,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:20:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41494748] [2022-12-14 07:20:03,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41494748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:20:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393154105] [2022-12-14 07:20:03,396 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 07:20:03,396 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:20:03,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:20:03,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:20:03,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:20:04,426 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 07:20:04,440 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:20:05,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '564#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:20:05,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:20:05,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:20:05,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-14 07:20:05,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228982056] [2022-12-14 07:20:05,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:20:05,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 07:20:05,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:05,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 07:20:05,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:20:05,231 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:20:21,113 WARN L233 SmtUtils]: Spent 12.71s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:20:23,367 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 [] [2022-12-14 07:20:25,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:20:27,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:20:36,413 WARN L233 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:20:39,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:20:45,267 WARN L233 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:20:48,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:20:51,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:20:53,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:20:55,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:20:58,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:21:00,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:21:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:21:01,177 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-12-14 07:21:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 07:21:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-12-14 07:21:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:21:01,178 INFO L225 Difference]: With dead ends: 59 [2022-12-14 07:21:01,178 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 07:21:01,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=107, Invalid=541, Unknown=2, NotChecked=0, Total=650 [2022-12-14 07:21:01,179 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 21 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:21:01,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 76 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 133 Invalid, 7 Unknown, 0 Unchecked, 25.6s Time] [2022-12-14 07:21:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 07:21:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2022-12-14 07:21:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 07:21:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-12-14 07:21:01,193 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 17 [2022-12-14 07:21:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:21:01,194 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-12-14 07:21:01,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:21:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-12-14 07:21:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 07:21:01,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:21:01,195 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 07:21:01,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:21:01,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:21:01,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:21:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:21:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash 687309511, now seen corresponding path program 2 times [2022-12-14 07:21:01,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:21:01,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512005323] [2022-12-14 07:21:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:21:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:21:01,427 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:21:01,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525345054] [2022-12-14 07:21:01,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:21:01,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:21:01,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:21:01,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:21:01,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:21:03,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 07:21:03,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:21:03,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:21:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:21:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:21:03,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:21:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:21:03,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:21:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512005323] [2022-12-14 07:21:03,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:21:03,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525345054] [2022-12-14 07:21:03,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525345054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:21:03,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748346713] [2022-12-14 07:21:03,676 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 07:21:03,676 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:21:03,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:21:03,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:21:03,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:21:04,413 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 07:21:04,428 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:21:05,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:21:05,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:21:05,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:21:05,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-14 07:21:05,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876460219] [2022-12-14 07:21:05,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:21:05,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 07:21:05,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:21:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 07:21:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-14 07:21:05,035 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:21:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:21:05,386 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2022-12-14 07:21:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:21:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2022-12-14 07:21:05,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:21:05,388 INFO L225 Difference]: With dead ends: 60 [2022-12-14 07:21:05,388 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 07:21:05,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-14 07:21:05,389 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:21:05,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 61 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:21:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 07:21:05,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-12-14 07:21:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 07:21:05,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-12-14 07:21:05,400 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 24 [2022-12-14 07:21:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:21:05,400 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-12-14 07:21:05,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:21:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-12-14 07:21:05,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 07:21:05,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:21:05,401 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:21:05,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:21:05,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:21:05,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:21:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:21:05,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1523523497, now seen corresponding path program 3 times [2022-12-14 07:21:05,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:21:05,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624298927] [2022-12-14 07:21:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:21:05,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:21:05,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:21:05,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649709437] [2022-12-14 07:21:05,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:21:05,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:21:05,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:21:05,647 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:21:05,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:21:05,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:21:05,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:21:05,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 07:21:05,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:21:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:21:05,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:21:15,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:21:15,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:21:15,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624298927] [2022-12-14 07:21:15,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:21:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649709437] [2022-12-14 07:21:15,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649709437] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:21:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989393909] [2022-12-14 07:21:15,651 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 07:21:15,651 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:21:15,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:21:15,651 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:21:15,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:21:16,302 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 07:21:16,317 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:21:21,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1190#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:21:21,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:21:21,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:21:21,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-12-14 07:21:21,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656919993] [2022-12-14 07:21:21,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:21:21,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 07:21:21,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:21:21,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 07:21:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=684, Unknown=2, NotChecked=0, Total=812 [2022-12-14 07:21:21,908 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:22:52,733 WARN L233 SmtUtils]: Spent 1.35m on a formula simplification that was a NOOP. DAG size: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:22:55,031 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 [] [2022-12-14 07:22:57,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:22:59,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:01,057 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse20 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse10 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse13 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse5 (<= (* 2 .cse4) .cse13)) (.cse11 (<= (* .cse10 4) .cse13)) (.cse6 (<= .cse20 .cse13)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (and (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) .cse5 (not .cse6)) (or (let ((.cse8 (* (* .cse10 |c_ULTIMATE.start_main_~q~0#1|) 4))) (let ((.cse9 (+ .cse8 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse7 (* (div .cse9 4294967296) 4294967296))) (and (< (+ .cse1 .cse7) (+ .cse8 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse9 (+ .cse1 .cse7 1)))))) (not .cse5) .cse11) (let ((.cse12 (mod |c_ULTIMATE.start_main_~b~0#1| 536870912))) (or (<= (* 8 .cse12) .cse13) (let ((.cse16 (* 8 (* .cse12 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse14 (+ .cse16 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse15 (* (div .cse14 4294967296) 4294967296))) (and (< .cse14 (+ .cse15 .cse1 1)) (< (+ .cse15 .cse1) (+ .cse16 |c_ULTIMATE.start_main_~r~0#1| 1)))))) (not .cse11))) (or .cse6 (let ((.cse19 (* 2 (* (div .cse20 2) |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse17 (+ .cse19 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse18 (* (div .cse17 4294967296) 4294967296))) (and (< .cse17 (+ .cse1 .cse18 1)) (< (+ .cse1 .cse18) (+ .cse19 |c_ULTIMATE.start_main_~r~0#1| 1)))))))))) is different from false [2022-12-14 07:23:08,914 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse15 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse11 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse5 (<= (* 2 .cse4) .cse11)) (.cse6 (<= .cse15 .cse11)) (.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (and (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) .cse5 (not .cse6)) (let ((.cse10 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (or (let ((.cse8 (* (* .cse10 |c_ULTIMATE.start_main_~q~0#1|) 4))) (let ((.cse9 (+ .cse8 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse7 (* (div .cse9 4294967296) 4294967296))) (and (< (+ .cse1 .cse7) (+ .cse8 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse9 (+ .cse1 .cse7 1)))))) (not .cse5) (<= (* .cse10 4) .cse11))) (or .cse6 (let ((.cse14 (* 2 (* (div .cse15 2) |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse12 (+ .cse14 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse13 (* (div .cse12 4294967296) 4294967296))) (and (< .cse12 (+ .cse1 .cse13 1)) (< (+ .cse1 .cse13) (+ .cse14 |c_ULTIMATE.start_main_~r~0#1| 1)))))))))) is different from true [2022-12-14 07:23:19,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:20,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:35,211 WARN L233 SmtUtils]: Spent 10.74s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:23:37,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:42,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:44,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:46,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:48,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:50,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:52,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:23:58,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:01,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:03,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:05,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:07,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:10,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:11,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:13,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:16,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:18,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:20,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:22,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:25,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:27,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:24:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:28,997 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-12-14 07:24:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 07:24:28,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-12-14 07:24:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:28,999 INFO L225 Difference]: With dead ends: 91 [2022-12-14 07:24:28,999 INFO L226 Difference]: Without dead ends: 86 [2022-12-14 07:24:29,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 134.1s TimeCoverageRelationStatistics Valid=192, Invalid=928, Unknown=10, NotChecked=130, Total=1260 [2022-12-14 07:24:29,000 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 36 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 66.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:29,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 180 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 373 Invalid, 18 Unknown, 10 Unchecked, 66.5s Time] [2022-12-14 07:24:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-14 07:24:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-12-14 07:24:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 65 states have internal predecessors, (70), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 6 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 07:24:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-12-14 07:24:29,030 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 23 [2022-12-14 07:24:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:29,031 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-12-14 07:24:29,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 18 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:24:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-12-14 07:24:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 07:24:29,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:29,033 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-12-14 07:24:29,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 07:24:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 07:24:29,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:24:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:29,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1838953197, now seen corresponding path program 4 times [2022-12-14 07:24:29,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:24:29,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422870001] [2022-12-14 07:24:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:29,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:24:29,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:24:29,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267319642] [2022-12-14 07:24:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:24:29,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:24:29,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:24:29,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:24:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:24:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:24:29,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:24:32,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:24:32,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422870001] [2022-12-14 07:24:32,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:24:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267319642] [2022-12-14 07:24:32,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267319642] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092376818] [2022-12-14 07:24:32,056 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 07:24:32,056 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:24:32,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:24:32,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:24:32,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:24:32,632 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-12-14 07:24:32,666 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:24:33,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1671#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:24:33,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:24:33,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:24:33,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2022-12-14 07:24:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152556561] [2022-12-14 07:24:33,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:24:33,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:24:33,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:24:33,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:24:33,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=351, Unknown=1, NotChecked=0, Total=420 [2022-12-14 07:24:33,913 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:24:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:34,972 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2022-12-14 07:24:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:24:34,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2022-12-14 07:24:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:34,974 INFO L225 Difference]: With dead ends: 97 [2022-12-14 07:24:34,974 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 07:24:34,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=84, Invalid=421, Unknown=1, NotChecked=0, Total=506 [2022-12-14 07:24:34,974 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:34,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 89 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:24:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 07:24:34,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-12-14 07:24:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 60 states have internal predecessors, (65), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:24:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-12-14 07:24:34,999 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 33 [2022-12-14 07:24:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:34,999 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-12-14 07:24:34,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:24:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-12-14 07:24:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 07:24:35,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:35,000 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 07:24:35,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:24:35,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:35,202 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:24:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1750527155, now seen corresponding path program 5 times [2022-12-14 07:24:35,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:24:35,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939413472] [2022-12-14 07:24:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:35,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:24:35,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:24:35,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968371342] [2022-12-14 07:24:35,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:24:35,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:35,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:24:35,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:24:35,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:25:04,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 07:25:04,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:25:04,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 07:25:04,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:27,400 WARN L233 SmtUtils]: Spent 7.27s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:26:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:26:50,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:37,884 WARN L233 SmtUtils]: Spent 20.07s on a formula simplification. DAG size of input: 59 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:28:16,883 WARN L233 SmtUtils]: Spent 21.08s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:28:46,232 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse4 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse8 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (= .cse0 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (let ((.cse10 (div .cse0 2))) (let ((.cse7 (mod .cse10 4294967296))) (let ((.cse12 (div .cse7 2)) (.cse13 (* .cse10 |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse6 (not (= (mod (+ (* 4294967295 |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse10 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0))) (.cse1 (* 2 .cse13)) (.cse3 (* 4 (* .cse12 |c_ULTIMATE.start_main_~q~0#1|))) (.cse5 (* (- 2) .cse13))) (and (or (let ((.cse2 (* (div (+ .cse3 .cse4 .cse5) 4294967296) 4294967296))) (and (< (+ .cse1 .cse2) (+ .cse3 1)) (< .cse3 (+ .cse1 .cse2 1)))) .cse6) (or .cse6 (not (<= .cse7 .cse8)) (let ((.cse11 (* .cse12 2))) (let ((.cse9 (* 4294967296 (div (+ .cse11 .cse3 .cse4 .cse5 (- .cse10)) 4294967296)))) (and (< (+ .cse1 .cse9 .cse10) (+ .cse11 .cse3 1)) (< (+ .cse11 .cse3) (+ .cse1 .cse9 .cse10 1))))))))))) (not (= .cse4 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296))) (<= .cse0 .cse8))) is different from true [2022-12-14 07:29:22,049 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse5 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))) (let ((.cse1 (* 2 .cse5)) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse2 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (= .cse1 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (<= .cse1 .cse2) (let ((.cse9 (div (mod .cse5 4294967296) 2))) (let ((.cse3 (* 2 .cse9)) (.cse4 (* (* .cse9 |c_ULTIMATE.start_main_~q~0#1|) 4)) (.cse8 (* .cse5 |c_ULTIMATE.start_main_~q~0#1|))) (let ((.cse6 (* .cse8 2)) (.cse7 (* (div (+ (- .cse5) .cse3 (* (- 2) .cse8) .cse0 .cse4) 4294967296) 4294967296))) (and (< (+ .cse3 .cse4) (+ .cse5 .cse6 1 .cse7)) (< (+ .cse5 .cse6 .cse7) (+ .cse3 .cse4 1)))))) (not (= (mod (+ (* 4294967295 |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~r~0#1| (* 2 .cse5 |c_ULTIMATE.start_main_~q~0#1|)) 4294967296) 0)) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse2))))) is different from true [2022-12-14 07:29:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 2 not checked. [2022-12-14 07:29:32,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:29:32,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939413472] [2022-12-14 07:29:32,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:29:32,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968371342] [2022-12-14 07:29:32,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968371342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:29:32,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523104138] [2022-12-14 07:29:32,689 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 07:29:32,689 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:29:32,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:29:32,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:29:32,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:29:33,284 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 07:29:33,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:29:41,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2147#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 07:29:41,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:29:41,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:29:41,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2022-12-14 07:29:41,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974164923] [2022-12-14 07:29:41,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:29:41,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 07:29:41,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 07:29:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=8, NotChecked=114, Total=992 [2022-12-14 07:29:41,892 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:29:45,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:29:47,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:29:53,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:29:56,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:29:59,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:30:01,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:30:12,744 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 133 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:30:14,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:30:16,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:30:19,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:30:21,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:30:23,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:30:25,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 07:30:53,112 WARN L233 SmtUtils]: Spent 19.98s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:30:56,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:30:58,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:31:00,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 07:31:05,761 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] [2022-12-14 07:31:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:05,762 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2022-12-14 07:31:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 07:31:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2022-12-14 07:31:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:05,767 INFO L225 Difference]: With dead ends: 99 [2022-12-14 07:31:05,767 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 07:31:05,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 122.7s TimeCoverageRelationStatistics Valid=167, Invalid=1020, Unknown=11, NotChecked=134, Total=1332 [2022-12-14 07:31:05,768 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 10 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 41.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:05,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 78 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 184 Invalid, 11 Unknown, 54 Unchecked, 41.9s Time] [2022-12-14 07:31:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 07:31:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2022-12-14 07:31:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.144927536231884) internal successors, (79), 74 states have internal predecessors, (79), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (14), 10 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 07:31:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2022-12-14 07:31:05,815 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 32 [2022-12-14 07:31:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:05,816 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2022-12-14 07:31:05,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 19 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:31:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2022-12-14 07:31:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:31:05,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:05,817 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-12-14 07:31:05,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 07:31:06,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:06,019 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:31:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:31:06,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2103087438, now seen corresponding path program 6 times [2022-12-14 07:31:06,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:31:06,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167092054] [2022-12-14 07:31:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:31:06,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:31:06,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 07:31:06,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445412339] [2022-12-14 07:31:06,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:31:06,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:31:06,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:31:06,058 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:31:06,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dbef18-0b75-48e5-93f3-f7088213dccb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:31:07,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:31:07,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:31:07,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 07:31:07,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:31:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:31:09,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:35,732 WARN L233 SmtUtils]: Spent 34.72s 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) [2022-12-14 07:34:15,806 WARN L233 SmtUtils]: Spent 36.38s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)