./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max20-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max20-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:14:33,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:14:33,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:14:33,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:14:33,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:14:33,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:14:33,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:14:33,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:14:33,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:14:33,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:14:33,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:14:33,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:14:33,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:14:33,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:14:33,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:14:33,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:14:33,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:14:33,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:14:33,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:14:33,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:14:33,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:14:33,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:14:33,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:14:33,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:14:33,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:14:33,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:14:33,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:14:33,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:14:33,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:14:33,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:14:33,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:14:33,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:14:33,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:14:33,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:14:33,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:14:33,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:14:33,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:14:33,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:14:33,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:14:33,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:14:33,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:14:33,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:14:33,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:14:33,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:14:33,875 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:14:33,875 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:14:33,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:14:33,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:14:33,877 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:14:33,877 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:14:33,877 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:14:33,878 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:14:33,878 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:14:33,878 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:14:33,878 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:14:33,879 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:14:33,879 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:14:33,879 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:14:33,880 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:14:33,880 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:14:33,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:14:33,881 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:14:33,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:14:33,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:14:33,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:14:33,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:14:33,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:14:33,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:14:33,883 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:14:33,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:14:33,883 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:14:33,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:14:33,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:14:33,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:14:33,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:14:33,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:14:33,885 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:14:33,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:14:33,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:14:33,886 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:14:33,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:14:33,887 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:14:33,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:14:33,887 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_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 [2022-11-26 00:14:34,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:14:34,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:14:34,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:14:34,272 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:14:34,273 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:14:34,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/reducercommutativity/max20-1.i [2022-11-26 00:14:37,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:14:38,195 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:14:38,196 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/sv-benchmarks/c/reducercommutativity/max20-1.i [2022-11-26 00:14:38,204 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/data/2e91fa4e4/59efb068eab94d259a92a5e5defb4881/FLAG599726a34 [2022-11-26 00:14:38,228 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/data/2e91fa4e4/59efb068eab94d259a92a5e5defb4881 [2022-11-26 00:14:38,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:14:38,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:14:38,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:14:38,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:14:38,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:14:38,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea1ae54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38, skipping insertion in model container [2022-11-26 00:14:38,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,263 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:14:38,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:14:38,516 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_355551da-18bf-4e01-8102-5668c443bf25/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2022-11-26 00:14:38,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:14:38,532 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:14:38,558 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_355551da-18bf-4e01-8102-5668c443bf25/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2022-11-26 00:14:38,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:14:38,588 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:14:38,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38 WrapperNode [2022-11-26 00:14:38,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:14:38,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:14:38,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:14:38,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:14:38,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,629 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-26 00:14:38,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:14:38,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:14:38,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:14:38,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:14:38,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,657 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:14:38,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:14:38,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:14:38,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:14:38,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (1/1) ... [2022-11-26 00:14:38,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:14:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:38,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:14:38,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:14:38,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:14:38,758 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-26 00:14:38,759 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-26 00:14:38,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:14:38,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:14:38,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:14:38,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:14:38,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:14:38,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:14:38,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:14:38,851 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:14:38,854 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:14:39,108 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:14:39,188 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:14:39,189 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:14:39,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:14:39 BoogieIcfgContainer [2022-11-26 00:14:39,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:14:39,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:14:39,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:14:39,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:14:39,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:14:38" (1/3) ... [2022-11-26 00:14:39,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397f971b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:14:39, skipping insertion in model container [2022-11-26 00:14:39,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:14:38" (2/3) ... [2022-11-26 00:14:39,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397f971b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:14:39, skipping insertion in model container [2022-11-26 00:14:39,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:14:39" (3/3) ... [2022-11-26 00:14:39,212 INFO L112 eAbstractionObserver]: Analyzing ICFG max20-1.i [2022-11-26 00:14:39,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:14:39,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:14:39,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:14:39,350 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;@63c8c796, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:14:39,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:14:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:14:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:14:39,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:39,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:39,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1438378950, now seen corresponding path program 1 times [2022-11-26 00:14:39,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:39,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047785991] [2022-11-26 00:14:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:39,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:14:39,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047785991] [2022-11-26 00:14:39,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047785991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:39,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:14:39,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:14:39,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338435013] [2022-11-26 00:14:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:39,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:39,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:39,882 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:14:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:39,947 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-11-26 00:14:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-26 00:14:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:39,960 INFO L225 Difference]: With dead ends: 33 [2022-11-26 00:14:39,961 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:14:39,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:14:39,970 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:39,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:39,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:14:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-26 00:14:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:14:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-26 00:14:40,021 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2022-11-26 00:14:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:40,022 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-26 00:14:40,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:14:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-26 00:14:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:14:40,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:40,026 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:40,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:14:40,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:40,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:40,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1900472846, now seen corresponding path program 1 times [2022-11-26 00:14:40,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:40,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037224440] [2022-11-26 00:14:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:14:40,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:40,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037224440] [2022-11-26 00:14:40,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037224440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:40,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261520189] [2022-11-26 00:14:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:40,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:40,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:40,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:40,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:14:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:14:40,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:14:40,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:14:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261520189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:40,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:14:40,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 00:14:40,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010853736] [2022-11-26 00:14:40,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:40,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:40,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:40,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:40,493 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:14:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:40,535 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-11-26 00:14:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:40,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-26 00:14:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:40,537 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:14:40,537 INFO L226 Difference]: Without dead ends: 17 [2022-11-26 00:14:40,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:40,540 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:40,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:40,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-26 00:14:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-26 00:14:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:14:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-26 00:14:40,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2022-11-26 00:14:40,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:40,548 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-26 00:14:40,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:14:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-26 00:14:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:14:40,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:40,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:40,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:40,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:40,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:40,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:40,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1710545452, now seen corresponding path program 1 times [2022-11-26 00:14:40,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:40,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212215845] [2022-11-26 00:14:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:40,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:14:41,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:41,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212215845] [2022-11-26 00:14:41,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212215845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:41,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665569895] [2022-11-26 00:14:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:41,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:41,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:41,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:41,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:14:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:41,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:14:41,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:14:41,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:14:41,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665569895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:14:41,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:14:41,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-26 00:14:41,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792874157] [2022-11-26 00:14:41,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:14:41,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:14:41,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:41,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:14:41,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:41,216 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:14:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:41,247 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-26 00:14:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:14:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-26 00:14:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:41,250 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:14:41,250 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:14:41,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:14:41,252 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:41,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:14:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-26 00:14:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:14:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-26 00:14:41,260 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2022-11-26 00:14:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:41,262 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-26 00:14:41,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:14:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-26 00:14:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:14:41,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:41,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:41,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 00:14:41,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-26 00:14:41,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1965911522, now seen corresponding path program 1 times [2022-11-26 00:14:41,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:41,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445170307] [2022-11-26 00:14:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:41,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:14:41,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445170307] [2022-11-26 00:14:41,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445170307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:41,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869264411] [2022-11-26 00:14:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:41,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:41,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:41,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:41,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:14:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:14:41,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:14:41,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:14:41,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869264411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:41,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1939956196] [2022-11-26 00:14:41,984 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:14:41,985 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:41,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:42,008 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:42,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:42,183 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:14:42,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:14:42,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:42,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:14:42,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:42,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:14:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:42,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:42,442 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:14:42,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-26 00:14:42,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:14:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:42,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:14:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:43,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:14:43,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:43,195 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 00:14:43,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-26 00:14:43,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:14:43,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:14:43,580 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:14:43,664 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:44,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '524#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (exists ((v_max_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:14:44,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:14:44,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:44,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-26 00:14:44,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434445512] [2022-11-26 00:14:44,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:14:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:44,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:14:44,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:14:44,836 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:14:44,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:44,897 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-26 00:14:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:14:44,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2022-11-26 00:14:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:44,899 INFO L225 Difference]: With dead ends: 36 [2022-11-26 00:14:44,899 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 00:14:44,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:14:44,903 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:44,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 00:14:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-26 00:14:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:14:44,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-11-26 00:14:44,915 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2022-11-26 00:14:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:44,915 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-11-26 00:14:44,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:14:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-11-26 00:14:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:14:44,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:44,916 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:44,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:45,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:45,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:45,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:45,118 INFO L85 PathProgramCache]: Analyzing trace with hash -275773198, now seen corresponding path program 2 times [2022-11-26 00:14:45,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:45,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77509784] [2022-11-26 00:14:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:45,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:14:45,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:45,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77509784] [2022-11-26 00:14:45,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77509784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:45,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622551390] [2022-11-26 00:14:45,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:14:45,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:45,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:45,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:14:45,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:14:45,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:14:45,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:14:45,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:14:45,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:14:45,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622551390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:45,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1055365565] [2022-11-26 00:14:45,470 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:14:45,472 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:45,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:45,473 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:45,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:45,518 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:14:45,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:14:45,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:45,552 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:14:45,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:14:45,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:45,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:14:45,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:45,678 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:14:45,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-26 00:14:45,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:14:45,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:45,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:14:46,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:46,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:46,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:14:46,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:46,092 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:14:46,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:14:46,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:14:46,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:14:46,325 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:14:46,405 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:51,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_max_~ret~0_BEFORE_RETURN_11 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_11 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_11 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_11 4294967296))))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:14:51,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:14:51,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:51,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 00:14:51,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380262597] [2022-11-26 00:14:51,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:51,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:14:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:14:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:14:51,697 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:14:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:51,743 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-26 00:14:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:14:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-11-26 00:14:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:51,747 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:14:51,747 INFO L226 Difference]: Without dead ends: 24 [2022-11-26 00:14:51,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:14:51,749 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:51,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:14:51,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-26 00:14:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-26 00:14:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:14:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-26 00:14:51,766 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-26 00:14:51,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:51,766 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-26 00:14:51,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:14:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-26 00:14:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:14:51,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:51,771 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:51,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 00:14:51,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:51,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1700893048, now seen corresponding path program 3 times [2022-11-26 00:14:51,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:51,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887758008] [2022-11-26 00:14:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:51,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-26 00:14:52,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887758008] [2022-11-26 00:14:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887758008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380638357] [2022-11-26 00:14:52,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:14:52,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:52,116 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:52,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:14:52,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:14:52,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:14:52,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:14:52,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-26 00:14:52,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-26 00:14:52,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380638357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:52,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264636569] [2022-11-26 00:14:52,413 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:14:52,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:52,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:52,414 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:52,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:52,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:52,454 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:14:52,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:14:52,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:52,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:14:52,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:52,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:14:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:52,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:52,573 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:14:52,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-26 00:14:52,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:14:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:52,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:14:52,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:52,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:52,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:14:52,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:52,946 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:14:52,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:14:52,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:14:53,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:14:53,161 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:14:53,233 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:14:56,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (exists ((v_max_~ret~0_BEFORE_RETURN_17 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_17 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_17 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_17 4294967296) (- 4294967296))))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:14:56,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:14:56,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:14:56,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2022-11-26 00:14:56,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298148983] [2022-11-26 00:14:56,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:14:56,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:14:56,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:14:56,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:14:56,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:14:56,501 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:14:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:14:56,567 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-26 00:14:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:14:56,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 37 [2022-11-26 00:14:56,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:14:56,568 INFO L225 Difference]: With dead ends: 49 [2022-11-26 00:14:56,569 INFO L226 Difference]: Without dead ends: 31 [2022-11-26 00:14:56,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:14:56,570 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:14:56,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:14:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-26 00:14:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-26 00:14:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:14:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-26 00:14:56,576 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 37 [2022-11-26 00:14:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:14:56,576 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-26 00:14:56,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:14:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-26 00:14:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-26 00:14:56,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:14:56,578 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:14:56,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:14:56,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:56,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:14:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:14:56,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1200915706, now seen corresponding path program 4 times [2022-11-26 00:14:56,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:14:56,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700030832] [2022-11-26 00:14:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:14:56,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:14:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:14:57,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:14:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700030832] [2022-11-26 00:14:57,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700030832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:14:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632285109] [2022-11-26 00:14:57,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:14:57,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:14:57,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:14:57,226 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:14:57,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:14:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:14:57,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:14:57,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:14:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:14:57,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:14:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:14:57,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632285109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:14:57,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977976536] [2022-11-26 00:14:57,668 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:14:57,668 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:14:57,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:14:57,669 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:14:57,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:14:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:57,702 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:14:57,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:14:57,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:57,737 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:14:57,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:14:57,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:57,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:14:57,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:57,842 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:14:57,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-26 00:14:57,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:14:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:57,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:14:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:58,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:14:58,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:14:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:14:58,187 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:14:58,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:14:58,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:14:58,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:14:58,409 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:14:58,469 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:05,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1572#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (exists ((v_max_~ret~0_BEFORE_RETURN_24 Int)) (= (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_24 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_24 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_24 4294967296))) |ULTIMATE.start_main_~ret5~0#1|)) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:05,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:05,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:05,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 23 [2022-11-26 00:15:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413992513] [2022-11-26 00:15:05,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:05,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:15:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:05,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:15:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:15:05,886 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:15:05,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:05,963 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-11-26 00:15:05,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:15:05,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-26 00:15:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:05,965 INFO L225 Difference]: With dead ends: 60 [2022-11-26 00:15:05,965 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 00:15:05,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:15:05,968 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:05,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 00:15:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-26 00:15:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:15:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-26 00:15:05,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 44 [2022-11-26 00:15:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:05,975 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-26 00:15:05,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-26 00:15:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-26 00:15:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:15:05,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:05,977 INFO L195 NwaCegarLoop]: trace histogram [20, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:05,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:06,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:15:06,189 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:06,190 INFO L85 PathProgramCache]: Analyzing trace with hash -628517242, now seen corresponding path program 5 times [2022-11-26 00:15:06,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:06,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856300011] [2022-11-26 00:15:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:06,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-11-26 00:15:06,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:06,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856300011] [2022-11-26 00:15:06,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856300011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:06,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76207968] [2022-11-26 00:15:06,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:15:06,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:06,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:06,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:06,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:15:06,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:15:06,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:06,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:15:06,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-26 00:15:06,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2022-11-26 00:15:06,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76207968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:06,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038214756] [2022-11-26 00:15:06,814 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:15:06,815 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:06,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:06,815 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:06,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:06,853 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:15:06,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:15:06,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:06,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:15:06,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:06,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:15:06,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:06,956 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:15:06,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-26 00:15:06,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:15:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:15:07,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:15:07,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:07,226 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 00:15:07,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-26 00:15:07,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:15:07,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:15:07,477 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:15:07,538 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:10,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2095#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (exists ((v_max_~ret~0_BEFORE_RETURN_29 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_29 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_29 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_29 4294967296))))) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:10,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:10,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:10,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2022-11-26 00:15:10,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223288371] [2022-11-26 00:15:10,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:10,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:15:10,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:10,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:15:10,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:15:10,766 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:15:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:10,834 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-11-26 00:15:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:15:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-11-26 00:15:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:10,836 INFO L225 Difference]: With dead ends: 64 [2022-11-26 00:15:10,836 INFO L226 Difference]: Without dead ends: 46 [2022-11-26 00:15:10,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:15:10,838 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:10,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-26 00:15:10,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-26 00:15:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:15:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-26 00:15:10,845 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2022-11-26 00:15:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:10,846 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-26 00:15:10,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:15:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-26 00:15:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-26 00:15:10,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:10,848 INFO L195 NwaCegarLoop]: trace histogram [20, 15, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:10,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:11,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:11,049 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash -728283200, now seen corresponding path program 6 times [2022-11-26 00:15:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:11,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626427876] [2022-11-26 00:15:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:11,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-26 00:15:11,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:11,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626427876] [2022-11-26 00:15:11,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626427876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:11,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809179220] [2022-11-26 00:15:11,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:15:11,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:11,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:11,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:11,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:15:11,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:15:11,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:11,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:15:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 74 proven. 15 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-26 00:15:11,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-26 00:15:11,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809179220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208230053] [2022-11-26 00:15:11,699 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:15:11,699 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:11,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:11,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:11,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:11,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,737 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:15:11,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:15:11,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:15:11,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:15:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,847 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:15:11,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-26 00:15:11,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:15:11,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:11,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:15:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:12,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:12,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:15:12,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:12,111 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-11-26 00:15:12,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 72 [2022-11-26 00:15:12,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:15:12,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:15:12,310 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:15:12,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:13,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2680#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (exists ((v_max_~ret~0_BEFORE_RETURN_36 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_36 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_36 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_36 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:13,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:13,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:13,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-26 00:15:13,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426257002] [2022-11-26 00:15:13,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:13,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:15:13,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:15:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:15:13,509 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:15:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:13,557 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2022-11-26 00:15:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:15:13,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2022-11-26 00:15:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:13,559 INFO L225 Difference]: With dead ends: 76 [2022-11-26 00:15:13,559 INFO L226 Difference]: Without dead ends: 53 [2022-11-26 00:15:13,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:15:13,561 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:13,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:15:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-26 00:15:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-26 00:15:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:15:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-11-26 00:15:13,568 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 61 [2022-11-26 00:15:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:13,568 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-11-26 00:15:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:15:13,569 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-11-26 00:15:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:15:13,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:13,570 INFO L195 NwaCegarLoop]: trace histogram [36, 20, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:13,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-26 00:15:13,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:15:13,775 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 668618246, now seen corresponding path program 7 times [2022-11-26 00:15:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:13,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618152493] [2022-11-26 00:15:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 418 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-11-26 00:15:14,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618152493] [2022-11-26 00:15:14,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618152493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981419693] [2022-11-26 00:15:14,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:15:14,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:14,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:14,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:14,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:15:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:15:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 340 proven. 78 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-11-26 00:15:14,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 418 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2022-11-26 00:15:14,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981419693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:14,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197326847] [2022-11-26 00:15:14,977 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:15:14,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:14,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:14,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:14,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:15,016 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:15:15,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:15:15,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:15,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:15:15,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:15,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:15:15,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:15,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:15:15,136 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:15:15,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 186 treesize of output 185 [2022-11-26 00:15:15,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:15:15,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:15,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:15:15,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:15,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:15:15,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:15,418 INFO L321 Elim1Store]: treesize reduction 40, result has 42.0 percent of original size [2022-11-26 00:15:15,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 85 [2022-11-26 00:15:15,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:15:15,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:15:15,645 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:15:15,705 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:16,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3437#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (exists ((v_max_~ret~0_BEFORE_RETURN_41 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_41 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_41 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_41 4294967296))))) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:16,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:16,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:16,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-26 00:15:16,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731261986] [2022-11-26 00:15:16,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:16,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:15:16,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:15:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:15:16,783 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:15:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:16,851 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2022-11-26 00:15:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:15:16,852 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 82 [2022-11-26 00:15:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:16,855 INFO L225 Difference]: With dead ends: 91 [2022-11-26 00:15:16,855 INFO L226 Difference]: Without dead ends: 61 [2022-11-26 00:15:16,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:15:16,862 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:16,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-26 00:15:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-26 00:15:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:15:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-11-26 00:15:16,884 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2022-11-26 00:15:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:16,887 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-11-26 00:15:16,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:15:16,887 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-11-26 00:15:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-26 00:15:16,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:16,893 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:16,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:17,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:15:17,100 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash -749049594, now seen corresponding path program 8 times [2022-11-26 00:15:17,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656149522] [2022-11-26 00:15:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:17,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-11-26 00:15:17,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:17,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656149522] [2022-11-26 00:15:17,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656149522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966789252] [2022-11-26 00:15:17,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:15:17,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:17,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:17,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:17,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:15:18,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:15:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:15:18,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 886 proven. 21 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-11-26 00:15:18,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2190 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-11-26 00:15:18,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966789252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596498436] [2022-11-26 00:15:18,232 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:15:18,232 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:18,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:18,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:18,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:18,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,271 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:15:18,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:15:18,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:15:18,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:15:18,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,383 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:15:18,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-26 00:15:18,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:15:18,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:15:18,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:15:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:18,654 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 00:15:18,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-26 00:15:18,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:15:18,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:15:18,903 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:15:18,969 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:22,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4378#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (exists ((v_max_~ret~0_BEFORE_RETURN_47 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_47 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_47 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_47 4294967296) (- 4294967296))))) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:15:22,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:22,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:22,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-26 00:15:22,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707391099] [2022-11-26 00:15:22,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:22,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:15:22,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:15:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:15:22,109 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:15:22,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:22,186 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2022-11-26 00:15:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:15:22,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 106 [2022-11-26 00:15:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:22,192 INFO L225 Difference]: With dead ends: 97 [2022-11-26 00:15:22,192 INFO L226 Difference]: Without dead ends: 69 [2022-11-26 00:15:22,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:15:22,194 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-26 00:15:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-26 00:15:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:15:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-11-26 00:15:22,220 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 106 [2022-11-26 00:15:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:22,221 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-11-26 00:15:22,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:15:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-11-26 00:15:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-26 00:15:22,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:22,230 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 14, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:22,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:22,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:22,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash 156688902, now seen corresponding path program 9 times [2022-11-26 00:15:22,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:22,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890745336] [2022-11-26 00:15:22,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:22,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:15:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-11-26 00:15:23,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:15:23,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890745336] [2022-11-26 00:15:23,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890745336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:15:23,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472545164] [2022-11-26 00:15:23,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:15:23,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:23,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:23,312 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:23,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:15:23,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:15:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:23,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:15:23,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 886 proven. 105 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2022-11-26 00:15:23,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2022-11-26 00:15:23,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472545164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:23,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883773029] [2022-11-26 00:15:23,992 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:15:23,992 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:15:23,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:15:23,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:15:23,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:15:24,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:24,031 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:15:24,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:15:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:24,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:15:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:24,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:15:24,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:24,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:24,133 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:15:24,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 184 [2022-11-26 00:15:24,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:15:24,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:24,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2022-11-26 00:15:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:24,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-26 00:15:24,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:15:24,431 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-26 00:15:24,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 80 [2022-11-26 00:15:24,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-26 00:15:24,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:15:24,613 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 12 for LOIs [2022-11-26 00:15:24,671 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:15:29,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5402#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 19 |ULTIMATE.start_main_~i~2#1|) (<= 20 |ULTIMATE.start_main_~i~1#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ 76 |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (exists ((v_max_~ret~0_BEFORE_RETURN_54 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) (+ (mod v_max_~ret~0_BEFORE_RETURN_54 4294967296) (- 4294967296))))))' at error location [2022-11-26 00:15:29,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:15:29,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:15:29,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-26 00:15:29,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235343373] [2022-11-26 00:15:29,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:29,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:15:29,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:15:29,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:15:29,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:15:29,952 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:15:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:30,025 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2022-11-26 00:15:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:15:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 114 [2022-11-26 00:15:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:30,027 INFO L225 Difference]: With dead ends: 102 [2022-11-26 00:15:30,027 INFO L226 Difference]: Without dead ends: 74 [2022-11-26 00:15:30,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 313 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:15:30,028 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:30,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:15:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-26 00:15:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-26 00:15:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:15:30,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-26 00:15:30,036 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 114 [2022-11-26 00:15:30,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:30,037 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-26 00:15:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:15:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-26 00:15:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-26 00:15:30,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:30,039 INFO L195 NwaCegarLoop]: trace histogram [60, 20, 19, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:15:30,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:30,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_355551da-18bf-4e01-8102-5668c443bf25/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:30,246 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:15:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:30,247 INFO L85 PathProgramCache]: Analyzing trace with hash 340546360, now seen corresponding path program 10 times [2022-11-26 00:15:30,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:15:30,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089532545] [2022-11-26 00:15:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat