./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-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_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/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_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/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_852454fc-0fc6-4ecd-b7ec-14bc5a619684/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 2971ec3e9ef2eef1d2151174358645d6ce0c6d4fe66ae89c00ded0f196979d8a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:11:57,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:11:57,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:11:57,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:11:57,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:11:57,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:11:57,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:11:57,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:11:57,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:11:57,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:11:57,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:11:57,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:11:57,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:11:57,751 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:11:57,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:11:57,753 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:11:57,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:11:57,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:11:57,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:11:57,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:11:57,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:11:57,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:11:57,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:11:57,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:11:57,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:11:57,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:11:57,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:11:57,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:11:57,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:11:57,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:11:57,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:11:57,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:11:57,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:11:57,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:11:57,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:11:57,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:11:57,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:11:57,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:11:57,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:11:57,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:11:57,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:11:57,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:11:57,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:11:57,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:11:57,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:11:57,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:11:57,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:11:57,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:11:57,847 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:11:57,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:11:57,848 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:11:57,848 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:11:57,849 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:11:57,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:11:57,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:11:57,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:11:57,850 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:11:57,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:11:57,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:11:57,851 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:11:57,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:11:57,852 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:11:57,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:11:57,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:11:57,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:11:57,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:11:57,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:11:57,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:11:57,854 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:11:57,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:11:57,855 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:11:57,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:11:57,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:11:57,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:11:57,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:11:57,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:11:57,856 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:11:57,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:11:57,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:11:57,857 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:11:57,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:11:57,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:11:57,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:11:57,858 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_852454fc-0fc6-4ecd-b7ec-14bc5a619684/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2971ec3e9ef2eef1d2151174358645d6ce0c6d4fe66ae89c00ded0f196979d8a [2022-11-26 01:11:58,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:11:58,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:11:58,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:11:58,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:11:58,225 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:11:58,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2022-11-26 01:12:01,318 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:12:01,563 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:12:01,563 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i [2022-11-26 01:12:01,577 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/data/3203877fb/d51565dc7800486587d88b23d5c06068/FLAG917bef219 [2022-11-26 01:12:01,595 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/data/3203877fb/d51565dc7800486587d88b23d5c06068 [2022-11-26 01:12:01,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:12:01,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:12:01,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:01,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:12:01,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:12:01,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a5f0c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:01, skipping insertion in model container [2022-11-26 01:12:01,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:12:01" (1/1) ... [2022-11-26 01:12:01,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:12:01,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:12:02,008 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_852454fc-0fc6-4ecd-b7ec-14bc5a619684/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2022-11-26 01:12:02,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:02,022 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:12:02,074 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_852454fc-0fc6-4ecd-b7ec-14bc5a619684/sv-benchmarks/c/list-ext2-properties/list_and_tree_cnstr-1.i[24291,24304] [2022-11-26 01:12:02,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:12:02,101 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:12:02,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02 WrapperNode [2022-11-26 01:12:02,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:12:02,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:02,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:12:02,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:12:02,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,150 INFO L138 Inliner]: procedures = 122, calls = 54, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 205 [2022-11-26 01:12:02,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:12:02,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:12:02,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:12:02,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:12:02,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,175 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,182 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:12:02,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:12:02,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:12:02,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:12:02,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (1/1) ... [2022-11-26 01:12:02,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:12:02,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:02,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:12:02,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:12:02,272 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-26 01:12:02,273 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-26 01:12:02,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 01:12:02,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 01:12:02,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 01:12:02,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:12:02,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 01:12:02,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 01:12:02,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:12:02,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:12:02,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:12:02,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:12:02,402 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:12:02,404 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:12:02,458 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-26 01:12:02,850 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:12:03,064 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:12:03,065 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-26 01:12:03,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:03 BoogieIcfgContainer [2022-11-26 01:12:03,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:12:03,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:12:03,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:12:03,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:12:03,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:12:01" (1/3) ... [2022-11-26 01:12:03,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b639bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:03, skipping insertion in model container [2022-11-26 01:12:03,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:12:02" (2/3) ... [2022-11-26 01:12:03,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b639bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:12:03, skipping insertion in model container [2022-11-26 01:12:03,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:03" (3/3) ... [2022-11-26 01:12:03,083 INFO L112 eAbstractionObserver]: Analyzing ICFG list_and_tree_cnstr-1.i [2022-11-26 01:12:03,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:12:03,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:12:03,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:12:03,154 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;@723ee121, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:12:03,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:12:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 32 states have (on average 1.625) internal successors, (52), 35 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 01:12:03,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:03,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:03,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:03,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1765403125, now seen corresponding path program 1 times [2022-11-26 01:12:03,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:03,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149438317] [2022-11-26 01:12:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:03,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:03,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:03,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149438317] [2022-11-26 01:12:03,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149438317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:03,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:03,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:12:03,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005910711] [2022-11-26 01:12:03,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:03,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 01:12:03,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 01:12:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:12:03,416 INFO L87 Difference]: Start difference. First operand has 37 states, 32 states have (on average 1.625) internal successors, (52), 35 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:03,531 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2022-11-26 01:12:03,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 01:12:03,534 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 01:12:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:03,540 INFO L225 Difference]: With dead ends: 73 [2022-11-26 01:12:03,541 INFO L226 Difference]: Without dead ends: 30 [2022-11-26 01:12:03,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 01:12:03,549 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:03,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:12:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-26 01:12:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-26 01:12:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-26 01:12:03,589 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2022-11-26 01:12:03,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:03,590 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-26 01:12:03,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-26 01:12:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 01:12:03,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:03,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:03,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:12:03,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:03,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:03,594 INFO L85 PathProgramCache]: Analyzing trace with hash 781742772, now seen corresponding path program 1 times [2022-11-26 01:12:03,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:03,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203085239] [2022-11-26 01:12:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:03,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:03,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:03,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203085239] [2022-11-26 01:12:03,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203085239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:03,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:03,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:12:03,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456154726] [2022-11-26 01:12:03,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:03,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:12:03,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:12:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:03,714 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:03,815 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-11-26 01:12:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:12:03,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 01:12:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:03,817 INFO L225 Difference]: With dead ends: 53 [2022-11-26 01:12:03,817 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 01:12:03,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:12:03,819 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:03,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:12:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 01:12:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-11-26 01:12:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-26 01:12:03,830 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 19 [2022-11-26 01:12:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:03,831 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-26 01:12:03,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-26 01:12:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 01:12:03,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:03,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:03,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 01:12:03,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1642802656, now seen corresponding path program 1 times [2022-11-26 01:12:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118114703] [2022-11-26 01:12:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:04,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:04,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118114703] [2022-11-26 01:12:04,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118114703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:04,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:04,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:12:04,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054224098] [2022-11-26 01:12:04,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:04,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:12:04,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:04,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:12:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:12:04,280 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:04,581 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-11-26 01:12:04,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:12:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 01:12:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:04,584 INFO L225 Difference]: With dead ends: 56 [2022-11-26 01:12:04,584 INFO L226 Difference]: Without dead ends: 52 [2022-11-26 01:12:04,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:12:04,586 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:04,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 79 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:12:04,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-26 01:12:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-11-26 01:12:04,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-11-26 01:12:04,595 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 23 [2022-11-26 01:12:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:04,596 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-11-26 01:12:04,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-11-26 01:12:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 01:12:04,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:04,598 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:04,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:12:04,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1863292667, now seen corresponding path program 1 times [2022-11-26 01:12:04,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:04,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448630042] [2022-11-26 01:12:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:04,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:04,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448630042] [2022-11-26 01:12:04,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448630042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:04,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:04,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:12:04,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292136993] [2022-11-26 01:12:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:04,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:12:04,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:12:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:12:04,868 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:05,178 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-11-26 01:12:05,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:12:05,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-26 01:12:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:05,180 INFO L225 Difference]: With dead ends: 58 [2022-11-26 01:12:05,182 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 01:12:05,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:12:05,185 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:05,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 83 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:12:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 01:12:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-11-26 01:12:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-11-26 01:12:05,192 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 25 [2022-11-26 01:12:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:05,192 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-11-26 01:12:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-11-26 01:12:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 01:12:05,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:05,194 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:05,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 01:12:05,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:05,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:05,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1406971653, now seen corresponding path program 1 times [2022-11-26 01:12:05,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:05,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485650346] [2022-11-26 01:12:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:05,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:05,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:05,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485650346] [2022-11-26 01:12:05,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485650346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:05,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:12:05,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 01:12:05,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118171972] [2022-11-26 01:12:05,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:05,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 01:12:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 01:12:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:12:05,386 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:05,709 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-11-26 01:12:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 01:12:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-26 01:12:05,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:05,713 INFO L225 Difference]: With dead ends: 58 [2022-11-26 01:12:05,714 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 01:12:05,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:12:05,715 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:05,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 72 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:12:05,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 01:12:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-11-26 01:12:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-11-26 01:12:05,719 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 25 [2022-11-26 01:12:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:05,720 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-11-26 01:12:05,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-11-26 01:12:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 01:12:05,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:05,721 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:05,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 01:12:05,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash 264273159, now seen corresponding path program 1 times [2022-11-26 01:12:05,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:05,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705040357] [2022-11-26 01:12:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:06,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:06,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705040357] [2022-11-26 01:12:06,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705040357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:06,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912490562] [2022-11-26 01:12:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:06,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:06,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:06,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:06,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:12:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 01:12:06,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:06,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-26 01:12:06,548 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:12:06,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:12:06,560 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 11 treesize of output 7 [2022-11-26 01:12:06,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:06,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:12:06,705 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 14 treesize of output 16 [2022-11-26 01:12:06,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:12:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:06,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:06,765 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_241 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_241) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2)) is different from false [2022-11-26 01:12:06,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:06,861 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2022-11-26 01:12:06,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:06,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 01:12:06,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-26 01:12:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-26 01:12:07,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912490562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:07,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1654716252] [2022-11-26 01:12:07,102 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:12:07,103 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:07,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:07,111 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:07,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:07,190 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:12:07,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-26 01:12:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:07,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:07,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-26 01:12:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:07,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:07,250 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 01:12:07,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:07,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:07,680 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:12:07,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 01:12:07,714 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:07,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 01:12:07,901 INFO L321 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2022-11-26 01:12:07,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 69 [2022-11-26 01:12:07,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:07,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:07,946 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:07,946 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 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:12:07,979 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 01:12:07,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:12:07,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:08,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 01:12:08,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:08,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:08,042 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:08,042 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 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:12:08,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:08,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:08,144 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 01:12:08,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 01:12:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:08,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-26 01:12:08,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:08,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:08,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:08,216 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:12:08,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-26 01:12:08,268 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 11 treesize of output 7 [2022-11-26 01:12:08,278 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 15 treesize of output 1 [2022-11-26 01:12:08,286 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 15 treesize of output 1 [2022-11-26 01:12:08,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:08,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:08,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:12:08,342 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 01:12:08,355 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 27 treesize of output 11 [2022-11-26 01:12:08,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:08,390 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 15 treesize of output 1 [2022-11-26 01:12:08,396 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 11 treesize of output 7 [2022-11-26 01:12:08,404 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 15 treesize of output 1 [2022-11-26 01:12:08,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:08,435 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 11 treesize of output 7 [2022-11-26 01:12:08,443 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 15 treesize of output 1 [2022-11-26 01:12:08,449 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 15 treesize of output 1 [2022-11-26 01:12:08,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:11,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '859#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~root~0#1.offset|) (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (<= |ULTIMATE.start_main_~root~0#1.offset| 0) (<= |#NULL.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 2)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (<= 0 |ULTIMATE.start_main_~root~0#1.base|) (<= |ULTIMATE.start_main_~root~0#1.base| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (<= 0 |ULTIMATE.start_main_~pred~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (<= |ULTIMATE.start_main_~pred~0#1.base| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (exists ((|v_ULTIMATE.start_main_~p~0#1.offset_25| Int) (|v_ULTIMATE.start_main_~p~0#1.base_27| Int)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_27|) |v_ULTIMATE.start_main_~p~0#1.offset_25|) 3)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|))' at error location [2022-11-26 01:12:11,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:11,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:12:11,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-26 01:12:11,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939775065] [2022-11-26 01:12:11,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:11,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 01:12:11,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:11,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 01:12:11,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=990, Unknown=2, NotChecked=64, Total=1190 [2022-11-26 01:12:11,653 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:12,449 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-11-26 01:12:12,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:12:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-26 01:12:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:12,453 INFO L225 Difference]: With dead ends: 60 [2022-11-26 01:12:12,453 INFO L226 Difference]: Without dead ends: 54 [2022-11-26 01:12:12,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=189, Invalid=1295, Unknown=2, NotChecked=74, Total=1560 [2022-11-26 01:12:12,454 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:12,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 134 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 171 Invalid, 0 Unknown, 35 Unchecked, 0.6s Time] [2022-11-26 01:12:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-26 01:12:12,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2022-11-26 01:12:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 41 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-26 01:12:12,464 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 27 [2022-11-26 01:12:12,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:12,464 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-26 01:12:12,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-26 01:12:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 01:12:12,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:12,469 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:12,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 01:12:12,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:12,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1127674823, now seen corresponding path program 1 times [2022-11-26 01:12:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:12,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516252510] [2022-11-26 01:12:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:12,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:13,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:13,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516252510] [2022-11-26 01:12:13,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516252510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:13,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883015754] [2022-11-26 01:12:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:13,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:13,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:13,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:13,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:12:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:13,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 01:12:13,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:13,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-26 01:12:13,267 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 11 treesize of output 7 [2022-11-26 01:12:13,280 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:12:13,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:12:13,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:13,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 01:12:13,383 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 14 treesize of output 16 [2022-11-26 01:12:13,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:12:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:13,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:13,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2022-11-26 01:12:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:13,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883015754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:13,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [151435345] [2022-11-26 01:12:13,604 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:12:13,604 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:13,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:13,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:13,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:13,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:13,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:13,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:13,660 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:12:13,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-26 01:12:13,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:13,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-26 01:12:13,693 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 01:12:13,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:13,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:13,971 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-26 01:12:13,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-11-26 01:12:14,043 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:12:14,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 01:12:14,163 INFO L321 Elim1Store]: treesize reduction 56, result has 34.1 percent of original size [2022-11-26 01:12:14,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 46 [2022-11-26 01:12:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:14,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:14,194 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:14,194 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 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:12:14,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:14,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 01:12:14,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:14,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:14,237 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:14,237 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 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:12:14,323 INFO L321 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2022-11-26 01:12:14,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 69 [2022-11-26 01:12:14,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:14,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:14,406 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 01:12:14,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 01:12:14,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:14,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:14,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:14,440 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:12:14,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-26 01:12:14,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:14,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-26 01:12:14,501 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 15 treesize of output 1 [2022-11-26 01:12:14,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:14,513 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 11 treesize of output 7 [2022-11-26 01:12:14,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:14,527 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 15 treesize of output 1 [2022-11-26 01:12:14,549 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 01:12:14,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:12:14,571 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 27 treesize of output 11 [2022-11-26 01:12:14,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:14,605 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 11 treesize of output 7 [2022-11-26 01:12:14,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:14,620 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 15 treesize of output 1 [2022-11-26 01:12:14,626 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 15 treesize of output 1 [2022-11-26 01:12:14,653 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 15 treesize of output 1 [2022-11-26 01:12:14,660 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 11 treesize of output 7 [2022-11-26 01:12:14,670 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 15 treesize of output 1 [2022-11-26 01:12:14,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:17,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1190#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~root~0#1.offset|) (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (<= |ULTIMATE.start_main_~root~0#1.offset| 0) (<= |#NULL.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 2)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_~p~0#1.offset|) (<= 0 |ULTIMATE.start_main_~root~0#1.base|) (<= |ULTIMATE.start_main_~root~0#1.base| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (<= 0 |ULTIMATE.start_main_~pred~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (<= |ULTIMATE.start_main_~pred~0#1.base| 0) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|) (exists ((|v_ULTIMATE.start_main_~p~0#1.base_35| Int) (|v_ULTIMATE.start_main_~p~0#1.offset_31| Int)) (= 3 (select (select |#memory_int| |v_ULTIMATE.start_main_~p~0#1.base_35|) |v_ULTIMATE.start_main_~p~0#1.offset_31|))))' at error location [2022-11-26 01:12:17,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:17,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:12:17,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-26 01:12:17,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731918712] [2022-11-26 01:12:17,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:17,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 01:12:17,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:17,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 01:12:17,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:12:17,074 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:17,773 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-26 01:12:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:12:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-26 01:12:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:17,775 INFO L225 Difference]: With dead ends: 54 [2022-11-26 01:12:17,775 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 01:12:17,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 01:12:17,776 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:17,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 144 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:12:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 01:12:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-11-26 01:12:17,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:17,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-11-26 01:12:17,782 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 27 [2022-11-26 01:12:17,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:17,783 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-11-26 01:12:17,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-11-26 01:12:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 01:12:17,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:17,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:17,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:17,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1636818466, now seen corresponding path program 1 times [2022-11-26 01:12:17,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:17,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701652972] [2022-11-26 01:12:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:18,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701652972] [2022-11-26 01:12:18,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701652972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930699258] [2022-11-26 01:12:18,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:18,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:18,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:18,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:18,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:12:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-26 01:12:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:18,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-26 01:12:18,736 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:12:18,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:12:18,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:12:18,778 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 01:12:18,833 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:18,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 61 [2022-11-26 01:12:18,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-26 01:12:18,843 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 32 treesize of output 34 [2022-11-26 01:12:18,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-26 01:12:18,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 11 [2022-11-26 01:12:18,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:12:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:18,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:18,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 57 [2022-11-26 01:12:18,951 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_445 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_445) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.offset|)) (forall ((v_ArrVal_446 (Array Int Int))) (= |c_ULTIMATE.start_main_~p~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_446) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))))) is different from false [2022-11-26 01:12:18,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:18,979 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-26 01:12:18,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:18,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-11-26 01:12:18,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:12:19,007 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 01:12:19,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-11-26 01:12:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-26 01:12:19,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930699258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:19,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645798688] [2022-11-26 01:12:19,123 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:12:19,124 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:19,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:19,124 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:19,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,181 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 01:12:19,181 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 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-26 01:12:19,213 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-26 01:12:19,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-26 01:12:19,258 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:12:19,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-26 01:12:19,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:19,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:19,504 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:12:19,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 01:12:19,532 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:19,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 01:12:19,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 01:12:19,668 INFO L321 Elim1Store]: treesize reduction 56, result has 34.1 percent of original size [2022-11-26 01:12:19,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 46 [2022-11-26 01:12:19,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:19,727 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:19,728 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 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:12:19,814 INFO L321 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2022-11-26 01:12:19,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 69 [2022-11-26 01:12:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:19,867 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:19,867 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 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:12:19,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-26 01:12:19,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:19,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:19,992 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 01:12:19,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 01:12:20,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:20,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:20,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:20,028 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:12:20,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-26 01:12:20,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:20,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:20,078 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 15 treesize of output 1 [2022-11-26 01:12:20,085 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 11 treesize of output 7 [2022-11-26 01:12:20,092 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 15 treesize of output 1 [2022-11-26 01:12:20,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:12:20,123 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 01:12:20,131 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 27 treesize of output 11 [2022-11-26 01:12:20,154 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 15 treesize of output 1 [2022-11-26 01:12:20,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:20,167 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 15 treesize of output 1 [2022-11-26 01:12:20,174 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 11 treesize of output 7 [2022-11-26 01:12:20,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:20,216 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 15 treesize of output 1 [2022-11-26 01:12:20,224 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 11 treesize of output 7 [2022-11-26 01:12:20,230 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 15 treesize of output 1 [2022-11-26 01:12:20,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:23,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1531#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~root~0#1.offset|) (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (<= |ULTIMATE.start_main_~root~0#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~root~0#1.base|) (<= |ULTIMATE.start_main_~root~0#1.base| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (<= 0 |ULTIMATE.start_main_~pred~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (<= |ULTIMATE.start_main_~pred~0#1.base| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|))' at error location [2022-11-26 01:12:23,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:23,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:12:23,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-11-26 01:12:23,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225659461] [2022-11-26 01:12:23,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:23,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 01:12:23,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:23,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 01:12:23,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=927, Unknown=1, NotChecked=62, Total=1122 [2022-11-26 01:12:23,006 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:24,124 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-11-26 01:12:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:12:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-26 01:12:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:24,125 INFO L225 Difference]: With dead ends: 78 [2022-11-26 01:12:24,126 INFO L226 Difference]: Without dead ends: 74 [2022-11-26 01:12:24,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=212, Invalid=1351, Unknown=1, NotChecked=76, Total=1640 [2022-11-26 01:12:24,127 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 184 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:24,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 148 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 254 Invalid, 0 Unknown, 64 Unchecked, 0.9s Time] [2022-11-26 01:12:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-26 01:12:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2022-11-26 01:12:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-26 01:12:24,138 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 29 [2022-11-26 01:12:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:24,138 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-26 01:12:24,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-26 01:12:24,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 01:12:24,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:24,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:24,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:24,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:24,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:24,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1073195645, now seen corresponding path program 1 times [2022-11-26 01:12:24,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:24,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272458694] [2022-11-26 01:12:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:24,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:25,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:25,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272458694] [2022-11-26 01:12:25,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272458694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:25,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268686564] [2022-11-26 01:12:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:25,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:25,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:25,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:25,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:12:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-26 01:12:25,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:25,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-26 01:12:25,310 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:12:25,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:12:25,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:12:25,351 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 01:12:25,411 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:25,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 61 [2022-11-26 01:12:25,417 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 42 treesize of output 44 [2022-11-26 01:12:25,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-26 01:12:25,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-26 01:12:25,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 23 treesize of output 11 [2022-11-26 01:12:25,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:12:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:25,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:25,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 30 [2022-11-26 01:12:25,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:25,667 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-26 01:12:25,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:25,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-11-26 01:12:25,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:12:25,706 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 01:12:25,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-11-26 01:12:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:25,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268686564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:25,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400402259] [2022-11-26 01:12:25,845 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:12:25,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:25,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:25,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:25,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:25,892 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:12:25,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-26 01:12:25,900 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 01:12:25,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:25,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-26 01:12:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:25,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:25,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:26,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:26,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:26,177 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:12:26,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 01:12:26,203 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:26,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 01:12:26,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:26,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 01:12:26,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:26,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:26,306 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:26,306 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 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:12:26,375 INFO L321 Elim1Store]: treesize reduction 56, result has 34.1 percent of original size [2022-11-26 01:12:26,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 46 [2022-11-26 01:12:26,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:26,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:26,411 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:26,412 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 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 01:12:26,510 INFO L321 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2022-11-26 01:12:26,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 69 [2022-11-26 01:12:26,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:26,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-26 01:12:26,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:26,642 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 01:12:26,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 01:12:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:26,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:26,687 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:12:26,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-26 01:12:26,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:26,727 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 15 treesize of output 1 [2022-11-26 01:12:26,738 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 15 treesize of output 1 [2022-11-26 01:12:26,742 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 11 treesize of output 7 [2022-11-26 01:12:26,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:26,770 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 01:12:26,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:12:26,786 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 27 treesize of output 11 [2022-11-26 01:12:26,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:26,816 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 11 treesize of output 7 [2022-11-26 01:12:26,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:26,828 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 15 treesize of output 1 [2022-11-26 01:12:26,834 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 15 treesize of output 1 [2022-11-26 01:12:26,853 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 15 treesize of output 1 [2022-11-26 01:12:26,859 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 15 treesize of output 1 [2022-11-26 01:12:26,863 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 11 treesize of output 7 [2022-11-26 01:12:27,050 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:30,035 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1951#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~root~0#1.offset|) (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (<= |ULTIMATE.start_main_~root~0#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~root~0#1.base|) (<= |ULTIMATE.start_main_~root~0#1.base| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (<= 0 |ULTIMATE.start_main_~pred~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (<= |ULTIMATE.start_main_~pred~0#1.base| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|))' at error location [2022-11-26 01:12:30,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:30,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:12:30,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-11-26 01:12:30,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794142941] [2022-11-26 01:12:30,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:30,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 01:12:30,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 01:12:30,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1321, Unknown=8, NotChecked=0, Total=1482 [2022-11-26 01:12:30,039 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:31,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:31,297 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-11-26 01:12:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:12:31,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-26 01:12:31,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:31,298 INFO L225 Difference]: With dead ends: 80 [2022-11-26 01:12:31,299 INFO L226 Difference]: Without dead ends: 70 [2022-11-26 01:12:31,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=286, Invalid=2058, Unknown=8, NotChecked=0, Total=2352 [2022-11-26 01:12:31,300 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 226 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:31,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 248 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:12:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-26 01:12:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-11-26 01:12:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-11-26 01:12:31,313 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 31 [2022-11-26 01:12:31,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:31,314 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-11-26 01:12:31,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-11-26 01:12:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 01:12:31,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:31,315 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:31,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:31,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:31,521 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2097898621, now seen corresponding path program 2 times [2022-11-26 01:12:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374090531] [2022-11-26 01:12:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:31,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:32,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374090531] [2022-11-26 01:12:32,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374090531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199741377] [2022-11-26 01:12:32,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:12:32,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:32,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:32,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:32,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:12:32,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:12:32,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:12:32,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-26 01:12:32,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:32,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-26 01:12:32,479 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:12:32,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:12:32,504 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 11 treesize of output 7 [2022-11-26 01:12:32,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:12:32,552 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:32,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-11-26 01:12:32,557 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 34 treesize of output 36 [2022-11-26 01:12:32,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-26 01:12:32,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 01:12:32,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 11 [2022-11-26 01:12:32,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:12:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:32,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:32,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 30 [2022-11-26 01:12:32,661 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((v_ArrVal_650 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_650) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) |c_ULTIMATE.start_main_~p~0#1.base|)) (forall ((v_ArrVal_652 (Array Int Int))) (= |c_ULTIMATE.start_main_~p~0#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))))) is different from false [2022-11-26 01:12:32,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:32,679 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-26 01:12:32,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:32,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-26 01:12:32,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 01:12:32,706 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 01:12:32,706 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-11-26 01:12:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-26 01:12:32,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199741377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:32,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1407573434] [2022-11-26 01:12:32,820 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:12:32,820 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:32,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:32,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:32,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:32,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:32,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:32,858 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 01:12:32,859 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 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-26 01:12:32,885 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-26 01:12:32,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-26 01:12:32,930 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:12:32,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-26 01:12:32,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:32,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:33,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:33,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:33,196 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-26 01:12:33,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-11-26 01:12:33,261 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:12:33,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 01:12:33,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:33,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:33,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:33,361 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:33,362 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 27 [2022-11-26 01:12:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:33,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 01:12:33,435 INFO L321 Elim1Store]: treesize reduction 56, result has 34.1 percent of original size [2022-11-26 01:12:33,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 46 [2022-11-26 01:12:33,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:33,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:33,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:33,489 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:33,489 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 27 [2022-11-26 01:12:33,568 INFO L321 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2022-11-26 01:12:33,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 69 [2022-11-26 01:12:33,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:33,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:33,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:33,645 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 01:12:33,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 01:12:33,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:33,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-26 01:12:33,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:33,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:33,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:33,700 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:12:33,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-26 01:12:33,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:33,748 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 15 treesize of output 1 [2022-11-26 01:12:33,753 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 15 treesize of output 1 [2022-11-26 01:12:33,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:33,767 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 11 treesize of output 7 [2022-11-26 01:12:33,788 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 01:12:33,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:12:33,805 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 27 treesize of output 11 [2022-11-26 01:12:33,824 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 11 treesize of output 7 [2022-11-26 01:12:33,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:33,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:33,844 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 15 treesize of output 1 [2022-11-26 01:12:33,850 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 15 treesize of output 1 [2022-11-26 01:12:33,876 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 15 treesize of output 1 [2022-11-26 01:12:33,882 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 11 treesize of output 7 [2022-11-26 01:12:33,888 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 15 treesize of output 1 [2022-11-26 01:12:34,041 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:36,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2367#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~root~0#1.offset|) (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (<= |ULTIMATE.start_main_~root~0#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~root~0#1.base|) (<= |ULTIMATE.start_main_~root~0#1.base| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (<= 0 |ULTIMATE.start_main_~pred~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (<= |ULTIMATE.start_main_~pred~0#1.base| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|))' at error location [2022-11-26 01:12:36,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:36,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:12:36,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-11-26 01:12:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944091889] [2022-11-26 01:12:36,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 01:12:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 01:12:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=936, Unknown=1, NotChecked=62, Total=1122 [2022-11-26 01:12:36,723 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:37,644 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-11-26 01:12:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:12:37,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-26 01:12:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:37,645 INFO L225 Difference]: With dead ends: 75 [2022-11-26 01:12:37,645 INFO L226 Difference]: Without dead ends: 62 [2022-11-26 01:12:37,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=229, Invalid=1580, Unknown=1, NotChecked=82, Total=1892 [2022-11-26 01:12:37,646 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 135 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:37,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 183 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 288 Invalid, 0 Unknown, 52 Unchecked, 0.6s Time] [2022-11-26 01:12:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-26 01:12:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-11-26 01:12:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-11-26 01:12:37,653 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 31 [2022-11-26 01:12:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:37,653 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-11-26 01:12:37,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-11-26 01:12:37,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 01:12:37,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:37,655 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:37,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:37,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:12:37,861 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1175683017, now seen corresponding path program 3 times [2022-11-26 01:12:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:37,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093146730] [2022-11-26 01:12:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:12:38,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093146730] [2022-11-26 01:12:38,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093146730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:38,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248094753] [2022-11-26 01:12:38,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:12:38,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:38,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:38,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:38,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:12:38,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:12:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:12:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-26 01:12:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:38,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-26 01:12:39,032 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 01:12:39,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 01:12:39,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:12:39,103 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 11 treesize of output 7 [2022-11-26 01:12:39,172 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:39,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-26 01:12:39,194 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-26 01:12:39,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-26 01:12:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:39,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:12:39,213 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 11 treesize of output 7 [2022-11-26 01:12:39,291 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 01:12:39,291 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 79 [2022-11-26 01:12:39,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2022-11-26 01:12:39,303 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 83 treesize of output 79 [2022-11-26 01:12:39,411 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-11-26 01:12:39,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 105 [2022-11-26 01:12:39,423 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 01:12:39,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 93 [2022-11-26 01:12:39,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 01:12:39,491 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-26 01:12:39,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 30 [2022-11-26 01:12:39,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 11 [2022-11-26 01:12:39,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 01:12:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:12:39,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:39,623 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int)) (v_ArrVal_791 (Array Int Int)) (v_ArrVal_790 (Array Int Int)) (v_ArrVal_792 (Array Int Int)) (v_ArrVal_789 Int)) (= 2 (let ((.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (select (let ((.cse0 (+ |c_ULTIMATE.start_main_~p~0#1.offset| 4))) (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 v_ArrVal_789)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_791) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~p~0#1.base|) .cse0 |c_ULTIMATE.start_main_~t~0#1.base|)) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_790) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~p~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_main_~t~0#1.base| v_ArrVal_792) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))))) is different from false [2022-11-26 01:12:39,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 56 [2022-11-26 01:12:39,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 65 [2022-11-26 01:12:39,664 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 121 [2022-11-26 01:12:39,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 27 [2022-11-26 01:12:39,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-26 01:12:39,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,853 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-26 01:12:39,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 198 [2022-11-26 01:12:39,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2022-11-26 01:12:39,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 117 [2022-11-26 01:12:39,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,964 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-26 01:12:39,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:39,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-26 01:12:39,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:39,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-26 01:12:40,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:40,007 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-26 01:12:40,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:40,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:40,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-11-26 01:12:40,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:12:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-26 01:12:40,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248094753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:40,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528068395] [2022-11-26 01:12:40,408 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:12:40,408 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:40,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:40,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:40,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:40,452 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-26 01:12:40,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-11-26 01:12:40,484 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 01:12:40,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 27 treesize of output 41 [2022-11-26 01:12:40,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:40,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:40,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:40,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-26 01:12:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:40,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2022-11-26 01:12:40,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:40,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 01:12:40,757 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-26 01:12:40,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-11-26 01:12:40,814 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:12:40,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 01:12:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:40,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 01:12:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:40,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:40,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:40,923 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:40,923 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 27 [2022-11-26 01:12:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:40,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:40,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:40,949 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-26 01:12:40,950 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 27 [2022-11-26 01:12:41,011 INFO L321 Elim1Store]: treesize reduction 56, result has 34.1 percent of original size [2022-11-26 01:12:41,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 46 [2022-11-26 01:12:41,097 INFO L321 Elim1Store]: treesize reduction 80, result has 31.6 percent of original size [2022-11-26 01:12:41,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 69 [2022-11-26 01:12:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:41,177 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:12:41,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-26 01:12:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:41,215 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 01:12:41,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 01:12:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-26 01:12:41,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:41,296 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 15 treesize of output 1 [2022-11-26 01:12:41,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:41,315 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 15 treesize of output 1 [2022-11-26 01:12:41,321 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 11 treesize of output 7 [2022-11-26 01:12:41,340 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 01:12:41,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 01:12:41,357 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 27 treesize of output 11 [2022-11-26 01:12:41,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:41,389 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 15 treesize of output 1 [2022-11-26 01:12:41,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-11-26 01:12:41,401 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 11 treesize of output 7 [2022-11-26 01:12:41,407 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 15 treesize of output 1 [2022-11-26 01:12:41,429 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 15 treesize of output 1 [2022-11-26 01:12:41,434 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 11 treesize of output 7 [2022-11-26 01:12:41,440 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 15 treesize of output 1 [2022-11-26 01:12:41,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:44,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2792#(and (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_main_~root~0#1.offset|) (<= |ULTIMATE.start_main_~n~0#1.offset| 0) (<= |ULTIMATE.start_main_~root~0#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~root~0#1.base|) (<= |ULTIMATE.start_main_~root~0#1.base| 0) (<= |#NULL.base| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 3)) (<= 0 |ULTIMATE.start_main_~pred~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~p~0#1.offset|) 1)) (<= |ULTIMATE.start_main_~pred~0#1.base| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~pred~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~pred~0#1.offset|))' at error location [2022-11-26 01:12:44,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:44,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:12:44,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-11-26 01:12:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061717062] [2022-11-26 01:12:44,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:44,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:12:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:12:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1398, Unknown=10, NotChecked=76, Total=1640 [2022-11-26 01:12:44,411 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:45,839 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2022-11-26 01:12:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 01:12:45,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-26 01:12:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:45,840 INFO L225 Difference]: With dead ends: 92 [2022-11-26 01:12:45,840 INFO L226 Difference]: Without dead ends: 86 [2022-11-26 01:12:45,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=278, Invalid=2263, Unknown=13, NotChecked=98, Total=2652 [2022-11-26 01:12:45,842 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 164 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:45,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 257 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 478 Invalid, 0 Unknown, 71 Unchecked, 1.0s Time] [2022-11-26 01:12:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-26 01:12:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2022-11-26 01:12:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-11-26 01:12:45,852 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 33 [2022-11-26 01:12:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:45,852 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-11-26 01:12:45,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:12:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-11-26 01:12:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 01:12:45,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:45,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:45,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:46,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:12:46,059 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:46,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:46,060 INFO L85 PathProgramCache]: Analyzing trace with hash 401747081, now seen corresponding path program 1 times [2022-11-26 01:12:46,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:46,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689768268] [2022-11-26 01:12:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:46,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:12:46,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-26 01:12:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-26 01:12:46,143 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-26 01:12:46,143 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-26 01:12:46,144 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 01:12:46,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 01:12:46,149 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:46,153 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 01:12:46,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 01:12:46 BoogieIcfgContainer [2022-11-26 01:12:46,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 01:12:46,188 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 01:12:46,188 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 01:12:46,188 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 01:12:46,188 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:12:03" (3/4) ... [2022-11-26 01:12:46,190 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-26 01:12:46,253 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 01:12:46,254 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 01:12:46,254 INFO L158 Benchmark]: Toolchain (without parser) took 44653.58ms. Allocated memory was 155.2MB in the beginning and 390.1MB in the end (delta: 234.9MB). Free memory was 114.8MB in the beginning and 352.3MB in the end (delta: -237.5MB). Peak memory consumption was 226.6MB. Max. memory is 16.1GB. [2022-11-26 01:12:46,254 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 113.2MB. Free memory is still 86.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:12:46,255 INFO L158 Benchmark]: CACSL2BoogieTranslator took 498.42ms. Allocated memory is still 155.2MB. Free memory was 114.8MB in the beginning and 97.0MB in the end (delta: 17.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-26 01:12:46,255 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.76ms. Allocated memory is still 155.2MB. Free memory was 97.0MB in the beginning and 94.4MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 01:12:46,255 INFO L158 Benchmark]: Boogie Preprocessor took 36.67ms. Allocated memory is still 155.2MB. Free memory was 94.4MB in the beginning and 92.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:12:46,255 INFO L158 Benchmark]: RCFGBuilder took 879.28ms. Allocated memory is still 155.2MB. Free memory was 92.3MB in the beginning and 115.6MB in the end (delta: -23.3MB). Peak memory consumption was 37.0MB. Max. memory is 16.1GB. [2022-11-26 01:12:46,256 INFO L158 Benchmark]: TraceAbstraction took 43116.32ms. Allocated memory was 155.2MB in the beginning and 390.1MB in the end (delta: 234.9MB). Free memory was 114.7MB in the beginning and 127.2MB in the end (delta: -12.6MB). Peak memory consumption was 223.1MB. Max. memory is 16.1GB. [2022-11-26 01:12:46,256 INFO L158 Benchmark]: Witness Printer took 66.20ms. Allocated memory is still 390.1MB. Free memory was 127.2MB in the beginning and 352.3MB in the end (delta: -225.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:12:46,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 113.2MB. Free memory is still 86.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 498.42ms. Allocated memory is still 155.2MB. Free memory was 114.8MB in the beginning and 97.0MB in the end (delta: 17.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.76ms. Allocated memory is still 155.2MB. Free memory was 97.0MB in the beginning and 94.4MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.67ms. Allocated memory is still 155.2MB. Free memory was 94.4MB in the beginning and 92.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 879.28ms. Allocated memory is still 155.2MB. Free memory was 92.3MB in the beginning and 115.6MB in the end (delta: -23.3MB). Peak memory consumption was 37.0MB. Max. memory is 16.1GB. * TraceAbstraction took 43116.32ms. Allocated memory was 155.2MB in the beginning and 390.1MB in the end (delta: 234.9MB). Free memory was 114.7MB in the beginning and 127.2MB in the end (delta: -12.6MB). Peak memory consumption was 223.1MB. Max. memory is 16.1GB. * Witness Printer took 66.20ms. Allocated memory is still 390.1MB. Free memory was 127.2MB in the beginning and 352.3MB in the end (delta: -225.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 620]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L552] struct TreeNode* root = malloc(sizeof(*root)), *n; [L553] root->left = ((void *)0) [L554] root->right = ((void *)0) VAL [root={-1:0}] [L555] COND FALSE !(__VERIFIER_nondet_int()) [L574] n = ((void *)0) [L575] struct TreeNode* pred; VAL [n={0:0}, root={-1:0}] [L576] COND TRUE \read(*root) [L577] pred = ((void *)0) [L578] n = root VAL [n={-1:0}, pred={0:0}, root={-1:0}] [L579] EXPR n->left [L579] n->left || n->right [L579] EXPR n->right [L579] n->left || n->right VAL [n={-1:0}, n->left={0:0}, n->left || n->right=0, n->right={0:0}, pred={0:0}, root={-1:0}] [L579] COND FALSE !(n->left || n->right) [L586] COND FALSE !(\read(*pred)) [L592] root = ((void *)0) [L576] COND FALSE !(\read(*root)) [L595] List a = (List) malloc(sizeof(struct node)); [L596] COND FALSE !(a == 0) VAL [a={-2:0}, n={-1:0}, pred={0:0}, pred->left={49:61}, root={0:0}] [L597] List t; [L598] List p = a; VAL [a={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, pred->left={49:61}, root={0:0}] [L599] COND TRUE __VERIFIER_nondet_int() [L600] p->h = 1 [L601] t = (List) malloc(sizeof(struct node)) [L602] COND FALSE !(t == 0) VAL [a={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, pred->left={49:61}, root={0:0}, t={-3:0}] [L603] p->n = t [L604] EXPR p->n [L604] p = p->n [L599] COND FALSE !(__VERIFIER_nondet_int()) [L606] COND TRUE __VERIFIER_nondet_int() [L607] p->h = 2 [L608] t = (List) malloc(sizeof(struct node)) [L609] COND FALSE !(t == 0) VAL [a={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, pred->left={49:61}, root={0:0}, t={-4:0}] [L610] p->n = t [L611] EXPR p->n [L611] p = p->n [L606] COND FALSE !(__VERIFIER_nondet_int()) [L613] p->h = 3 [L614] p = a VAL [a={-2:0}, n={-1:0}, p={-2:0}, pred={0:0}, pred->left={49:61}, root={0:0}, t={-4:0}] [L615] EXPR p->h VAL [a={-2:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, pred->left={49:61}, root={0:0}, t={-4:0}] [L615] COND FALSE !(p->h == 2) [L617] EXPR p->h VAL [a={-2:0}, n={-1:0}, p={-2:0}, p->h=1, pred={0:0}, pred->left={49:61}, root={0:0}, t={-4:0}] [L617] COND TRUE p->h == 1 [L618] EXPR p->n [L618] p = p->n [L617] EXPR p->h VAL [a={-2:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, pred->left={49:61}, root={0:0}, t={-4:0}] [L617] COND FALSE !(p->h == 1) [L619] EXPR p->h VAL [a={-2:0}, n={-1:0}, p={-3:0}, p->h=2, pred={0:0}, pred->left={49:61}, root={0:0}, t={-4:0}] [L619] COND TRUE p->h != 3 [L620] reach_error() VAL [a={-2:0}, n={-1:0}, p={-3:0}, pred={0:0}, pred->left={49:61}, root={0:0}, t={-4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 43.0s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 939 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 939 mSDsluCounter, 1436 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 222 IncrementalHoareTripleChecker+Unchecked, 1192 mSDsCounter, 187 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2058 IncrementalHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 187 mSolverCounterUnsat, 244 mSDtfsCounter, 2058 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 655 GetRequests, 370 SyntacticMatches, 18 SemanticMatches, 267 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 20.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=11, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 98 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 495 NumberOfCodeBlocks, 489 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 617 ConstructedInterpolants, 49 QuantifiedInterpolants, 6025 SizeOfPredicates, 66 NumberOfNonLiveVariables, 1219 ConjunctsInSsa, 237 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 39/121 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-26 01:12:46,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_852454fc-0fc6-4ecd-b7ec-14bc5a619684/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE