./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI --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 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 --- 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-5e519f3 [2022-11-03 03:29:25,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:29:25,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:29:25,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:29:25,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:29:25,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:29:25,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:29:25,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:29:25,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:29:25,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:29:25,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:29:25,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:29:25,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:29:25,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:29:25,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:29:25,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:29:25,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:29:25,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:29:25,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:29:25,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:29:25,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:29:25,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:29:25,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:29:25,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:29:25,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:29:25,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:29:25,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:29:25,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:29:25,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:29:25,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:29:25,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:29:25,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:29:25,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:29:25,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:29:25,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:29:25,831 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:29:25,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:29:25,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:29:25,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:29:25,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:29:25,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:29:25,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:29:25,877 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:29:25,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:29:25,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:29:25,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:29:25,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:29:25,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:29:25,880 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:29:25,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:29:25,880 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:29:25,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:29:25,881 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:29:25,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:29:25,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:29:25,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:29:25,882 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:29:25,882 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:29:25,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:29:25,883 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:29:25,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:29:25,884 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:29:25,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:29:25,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:29:25,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:29:25,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:29:25,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:29:25,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:29:25,885 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:29:25,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:29:25,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:29:25,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:29:25,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:29:25,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:29:25,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:25,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:29:25,887 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:29:25,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:29:25,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:29:25,888 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:29:25,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:29:25,888 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:29:25,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:29:25,889 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_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 [2022-11-03 03:29:26,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:29:26,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:29:26,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:29:26,223 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:29:26,224 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:29:26,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2022-11-03 03:29:26,290 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/data/2685b4824/8ee05b11a1c243f9b1dd3a9b88a325a3/FLAG8d2165b83 [2022-11-03 03:29:26,779 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:29:26,779 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2022-11-03 03:29:26,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/data/2685b4824/8ee05b11a1c243f9b1dd3a9b88a325a3/FLAG8d2165b83 [2022-11-03 03:29:27,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/data/2685b4824/8ee05b11a1c243f9b1dd3a9b88a325a3 [2022-11-03 03:29:27,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:29:27,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:29:27,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:27,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:29:27,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:29:27,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7ac43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27, skipping insertion in model container [2022-11-03 03:29:27,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:29:27,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:29:27,374 WARN L230 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_995939bf-6053-43c3-aa36-b4a2ea07a36f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2022-11-03 03:29:27,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:27,422 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:29:27,434 WARN L230 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_995939bf-6053-43c3-aa36-b4a2ea07a36f/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i[832,845] [2022-11-03 03:29:27,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:29:27,459 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:29:27,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27 WrapperNode [2022-11-03 03:29:27,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:29:27,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:27,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:29:27,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:29:27,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,498 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2022-11-03 03:29:27,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:29:27,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:29:27,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:29:27,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:29:27,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,523 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:29:27,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:29:27,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:29:27,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:29:27,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (1/1) ... [2022-11-03 03:29:27,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:29:27,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:27,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:29:27,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:29:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:29:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:29:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:29:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:29:27,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:29:27,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:29:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:29:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 03:29:27,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 03:29:27,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:29:27,728 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:29:27,730 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:29:28,036 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:29:28,124 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:29:28,125 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-03 03:29:28,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:28 BoogieIcfgContainer [2022-11-03 03:29:28,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:29:28,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:29:28,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:29:28,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:29:28,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:29:27" (1/3) ... [2022-11-03 03:29:28,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651f36f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:28, skipping insertion in model container [2022-11-03 03:29:28,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:29:27" (2/3) ... [2022-11-03 03:29:28,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651f36f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:29:28, skipping insertion in model container [2022-11-03 03:29:28,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:29:28" (3/3) ... [2022-11-03 03:29:28,147 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2022-11-03 03:29:28,168 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:29:28,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:29:28,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:29:28,254 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;@61f7898b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:29:28,254 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:29:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:29:28,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:28,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:28,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:28,286 INFO L85 PathProgramCache]: Analyzing trace with hash 825226196, now seen corresponding path program 1 times [2022-11-03 03:29:28,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:28,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141431440] [2022-11-03 03:29:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:28,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:28,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:28,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141431440] [2022-11-03 03:29:28,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141431440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:28,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:29:28,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:29:28,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449405730] [2022-11-03 03:29:28,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:28,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:28,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:28,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:28,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:29:28,686 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:28,838 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2022-11-03 03:29:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:28,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 03:29:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:28,851 INFO L225 Difference]: With dead ends: 57 [2022-11-03 03:29:28,851 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 03:29:28,854 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 [2022-11-03 03:29:28,861 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:28,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 03:29:28,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2022-11-03 03:29:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:29:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2022-11-03 03:29:28,910 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 8 [2022-11-03 03:29:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:28,911 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2022-11-03 03:29:28,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2022-11-03 03:29:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:29:28,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:28,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:28,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:29:28,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:28,916 INFO L85 PathProgramCache]: Analyzing trace with hash -224566578, now seen corresponding path program 1 times [2022-11-03 03:29:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:28,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028895495] [2022-11-03 03:29:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:28,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:29,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:29,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028895495] [2022-11-03 03:29:29,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028895495] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:29,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437913476] [2022-11-03 03:29:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:29,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:29,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:29,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:29,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:29:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:29,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:29,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:29,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437913476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:29,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950100023] [2022-11-03 03:29:29,283 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:29:29,284 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:29,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:29,297 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:29,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:29,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,426 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:29:29,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:29:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,463 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:29:29,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:29:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:29:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,749 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:29:29,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-03 03:29:29,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:29,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:29,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1950100023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:29,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:29,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2022-11-03 03:29:29,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811856881] [2022-11-03 03:29:29,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:29,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:29:29,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:29:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:29,902 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:29,963 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2022-11-03 03:29:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:29:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 03:29:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:29,965 INFO L225 Difference]: With dead ends: 43 [2022-11-03 03:29:29,965 INFO L226 Difference]: Without dead ends: 23 [2022-11-03 03:29:29,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:29:29,967 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:29,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-03 03:29:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-11-03 03:29:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-03 03:29:29,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2022-11-03 03:29:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:29,974 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-03 03:29:29,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-03 03:29:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:29:29,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:29,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:30,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:30,195 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash -747487474, now seen corresponding path program 1 times [2022-11-03 03:29:30,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:30,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853962379] [2022-11-03 03:29:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:29:30,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:30,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853962379] [2022-11-03 03:29:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853962379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72520943] [2022-11-03 03:29:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:30,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:30,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:30,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:29:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:29:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:30,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:29:30,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72520943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:30,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:29:30,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-03 03:29:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824908861] [2022-11-03 03:29:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:30,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:29:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:29:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:30,456 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:30,505 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-11-03 03:29:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:29:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 03:29:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:30,509 INFO L225 Difference]: With dead ends: 39 [2022-11-03 03:29:30,509 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 03:29:30,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:29:30,516 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:30,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:29:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 03:29:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-03 03:29:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-03 03:29:30,532 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2022-11-03 03:29:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:30,532 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-03 03:29:30,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-03 03:29:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:29:30,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:30,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:30,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:30,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:30,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1790313624, now seen corresponding path program 1 times [2022-11-03 03:29:30,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:30,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254388244] [2022-11-03 03:29:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:30,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:30,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254388244] [2022-11-03 03:29:30,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254388244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:30,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748396499] [2022-11-03 03:29:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:30,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:30,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:30,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:30,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:29:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:30,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:30,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:30,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:29:30,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748396499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:30,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443482247] [2022-11-03 03:29:30,989 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 03:29:30,989 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:30,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:30,990 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:30,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,026 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:29:31,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:29:31,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:29:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:31,157 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:29:31,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-03 03:29:31,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:31,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:31,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:31,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:31,377 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:29:31,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 119 [2022-11-03 03:29:31,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:31,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:31,531 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:29:31,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 30 [2022-11-03 03:29:31,776 INFO L356 Elim1Store]: treesize reduction 143, result has 33.8 percent of original size [2022-11-03 03:29:31,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 232 [2022-11-03 03:29:32,367 INFO L356 Elim1Store]: treesize reduction 143, result has 33.8 percent of original size [2022-11-03 03:29:32,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 232 [2022-11-03 03:29:32,709 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:33,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1443482247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:29:33,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:33,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2022-11-03 03:29:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566241565] [2022-11-03 03:29:33,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:29:33,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:29:33,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:29:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:29:33,522 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:33,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:33,948 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-11-03 03:29:33,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:29:33,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:29:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:33,950 INFO L225 Difference]: With dead ends: 44 [2022-11-03 03:29:33,950 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 03:29:33,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:29:33,951 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:33,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:33,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 03:29:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-11-03 03:29:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-03 03:29:33,960 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2022-11-03 03:29:33,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:33,960 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-03 03:29:33,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-03 03:29:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:29:33,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:33,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:34,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:34,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:34,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash 457595505, now seen corresponding path program 1 times [2022-11-03 03:29:34,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:34,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297681989] [2022-11-03 03:29:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:34,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:34,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297681989] [2022-11-03 03:29:34,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297681989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:34,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491178221] [2022-11-03 03:29:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:34,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:34,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:34,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:34,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:29:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:34,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:34,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:34,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:34,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491178221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:34,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6282191] [2022-11-03 03:29:34,385 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:29:34,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:34,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:34,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:34,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:34,429 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:29:34,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:29:34,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:34,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:34,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:29:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:34,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:34,551 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:29:34,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-03 03:29:34,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:34,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:34,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:34,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:29:34,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:29:34,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:34,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:34,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:34,965 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 03:29:34,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-03 03:29:35,352 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:35,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:35,674 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:35,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:35,909 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:35,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:36,070 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:29:36,098 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:37,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '796#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) 4))) 1 0) |__VERIFIER_assert_#in~cond|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:37,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:37,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:37,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 03:29:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345766327] [2022-11-03 03:29:37,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:37,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:29:37,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:29:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:29:37,095 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:37,164 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-11-03 03:29:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:37,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 03:29:37,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:37,165 INFO L225 Difference]: With dead ends: 66 [2022-11-03 03:29:37,165 INFO L226 Difference]: Without dead ends: 44 [2022-11-03 03:29:37,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:29:37,166 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:37,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-03 03:29:37,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2022-11-03 03:29:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-11-03 03:29:37,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2022-11-03 03:29:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:37,176 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-11-03 03:29:37,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-11-03 03:29:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:29:37,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:37,177 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:37,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:37,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:37,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash 930745131, now seen corresponding path program 2 times [2022-11-03 03:29:37,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:37,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385863504] [2022-11-03 03:29:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:37,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:29:37,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385863504] [2022-11-03 03:29:37,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385863504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103028559] [2022-11-03 03:29:37,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:29:37,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:37,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:37,543 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:37,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:29:37,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:29:37,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 03:29:37,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:29:37,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:29:37,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103028559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:37,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890758780] [2022-11-03 03:29:37,657 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:29:37,657 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:37,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:37,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:37,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:37,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,688 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:29:37,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:29:37,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:37,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:29:37,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:37,781 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:29:37,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-03 03:29:37,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:37,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:37,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:37,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:29:37,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:29:37,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:38,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:38,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:38,120 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 03:29:38,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-03 03:29:38,678 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:38,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:38,953 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:29:38,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:29:39,639 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:29:39,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:29:39,918 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:29:39,936 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:40,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1109#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) 4))) 1 0)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:40,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:40,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:40,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 03:29:40,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826691472] [2022-11-03 03:29:40,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:40,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:29:40,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:29:40,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:29:40,923 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:41,022 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2022-11-03 03:29:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:29:41,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 03:29:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:41,023 INFO L225 Difference]: With dead ends: 66 [2022-11-03 03:29:41,023 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 03:29:41,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:29:41,024 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:41,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 03:29:41,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-03 03:29:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2022-11-03 03:29:41,037 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2022-11-03 03:29:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:41,037 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2022-11-03 03:29:41,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2022-11-03 03:29:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 03:29:41,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:41,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:41,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:41,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:29:41,243 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:41,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1985012685, now seen corresponding path program 3 times [2022-11-03 03:29:41,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:41,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337097892] [2022-11-03 03:29:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:29:41,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:41,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337097892] [2022-11-03 03:29:41,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337097892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:41,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267460432] [2022-11-03 03:29:41,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:29:41,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:41,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:41,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:41,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:29:41,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:29:41,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:29:41,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:29:41,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267460432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:41,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813963426] [2022-11-03 03:29:41,601 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:29:41,601 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:41,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:41,601 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:41,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:41,628 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:29:41,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:29:41,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:41,657 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:29:41,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:29:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:41,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:29:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:41,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:41,745 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:29:41,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-03 03:29:41,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:41,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:41,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:41,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:29:41,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:29:41,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:42,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:42,085 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 03:29:42,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-03 03:29:42,564 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:42,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:42,803 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:29:42,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:29:43,541 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:29:43,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:29:43,726 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:29:43,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:44,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1516#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) 4))) 1 0) |__VERIFIER_assert_#in~cond|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:44,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:44,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:44,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-03 03:29:44,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081672995] [2022-11-03 03:29:44,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:44,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:29:44,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:44,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:29:44,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:29:44,663 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:44,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:44,825 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2022-11-03 03:29:44,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:29:44,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-03 03:29:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:44,828 INFO L225 Difference]: With dead ends: 130 [2022-11-03 03:29:44,828 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 03:29:44,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:29:44,830 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:44,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 48 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 03:29:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2022-11-03 03:29:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-03 03:29:44,861 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2022-11-03 03:29:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:44,861 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-03 03:29:44,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-03 03:29:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 03:29:44,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:44,864 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:44,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:45,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 03:29:45,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash 27316621, now seen corresponding path program 4 times [2022-11-03 03:29:45,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:45,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280066825] [2022-11-03 03:29:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:29:45,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:45,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280066825] [2022-11-03 03:29:45,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280066825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:45,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907022973] [2022-11-03 03:29:45,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:29:45,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:45,359 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:45,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:29:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:29:45,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:29:45,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:29:45,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907022973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:45,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [513619975] [2022-11-03 03:29:45,721 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:29:45,721 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:45,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:45,722 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:45,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:45,745 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:29:45,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:29:45,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:45,774 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:29:45,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:29:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:45,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:29:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:45,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:45,856 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:29:45,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-03 03:29:45,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:45,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:45,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:45,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:29:46,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:29:46,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:46,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:46,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:46,230 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 03:29:46,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-03 03:29:46,549 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:46,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:46,806 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:46,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:47,055 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:47,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:47,176 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:29:47,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:48,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2099#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) 4))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:48,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:48,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:48,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-03 03:29:48,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099718385] [2022-11-03 03:29:48,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:48,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:29:48,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:29:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=855, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:29:48,129 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:48,451 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2022-11-03 03:29:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-03 03:29:48,452 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-03 03:29:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:48,453 INFO L225 Difference]: With dead ends: 190 [2022-11-03 03:29:48,453 INFO L226 Difference]: Without dead ends: 151 [2022-11-03 03:29:48,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=551, Invalid=855, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:29:48,455 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 154 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:48,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 67 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-03 03:29:48,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 63. [2022-11-03 03:29:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-11-03 03:29:48,474 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 38 [2022-11-03 03:29:48,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:48,475 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-11-03 03:29:48,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-11-03 03:29:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:29:48,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:48,476 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:48,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:48,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:48,703 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1554989811, now seen corresponding path program 5 times [2022-11-03 03:29:48,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:48,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788073987] [2022-11-03 03:29:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 03:29:49,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:49,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788073987] [2022-11-03 03:29:49,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788073987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719773840] [2022-11-03 03:29:49,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:29:49,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:49,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:49,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:49,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:29:49,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:29:49,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:29:49,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-03 03:29:49,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-03 03:29:49,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719773840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:49,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779574342] [2022-11-03 03:29:49,879 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:29:49,880 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:49,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:49,880 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:49,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:49,907 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:29:49,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:29:49,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:49,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:49,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:49,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:29:49,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:49,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:49,995 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:29:49,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-03 03:29:50,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:50,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:50,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:50,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:29:50,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:29:50,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:50,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:50,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:50,325 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 03:29:50,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-03 03:29:50,602 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:50,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:50,961 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:29:50,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:29:51,285 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:29:51,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:29:51,439 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:29:51,450 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:52,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2896#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) 0))) 1 0) |__VERIFIER_assert_#in~cond|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:52,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:52,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:52,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-03 03:29:52,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637573117] [2022-11-03 03:29:52,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:52,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-03 03:29:52,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-03 03:29:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2022-11-03 03:29:52,523 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:53,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:53,115 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2022-11-03 03:29:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 03:29:53,116 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-03 03:29:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:53,118 INFO L225 Difference]: With dead ends: 245 [2022-11-03 03:29:53,118 INFO L226 Difference]: Without dead ends: 206 [2022-11-03 03:29:53,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=966, Invalid=2340, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 03:29:53,123 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 501 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:53,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 101 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:29:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-03 03:29:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2022-11-03 03:29:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 109 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2022-11-03 03:29:53,153 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 50 [2022-11-03 03:29:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:53,154 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2022-11-03 03:29:53,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2022-11-03 03:29:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 03:29:53,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:53,156 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:53,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:53,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:53,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1036958695, now seen corresponding path program 6 times [2022-11-03 03:29:53,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:53,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213928254] [2022-11-03 03:29:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:53,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 03:29:54,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:54,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213928254] [2022-11-03 03:29:54,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213928254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:54,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547725234] [2022-11-03 03:29:54,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:29:54,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:54,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:54,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:54,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:29:54,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:29:54,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:54,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:29:54,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 03:29:54,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 03:29:55,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547725234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:55,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667868924] [2022-11-03 03:29:55,599 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:29:55,599 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:55,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:55,599 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:55,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:55,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,638 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:29:55,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:29:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:29:55,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:55,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:55,743 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:29:55,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-03 03:29:55,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:55,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:55,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:55,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:29:55,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:29:55,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:56,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:56,076 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 03:29:56,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-03 03:29:56,359 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:29:56,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:29:56,681 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:29:56,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:29:57,287 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:29:57,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:29:57,557 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:29:57,580 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:58,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4074#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) 0))) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:58,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:58,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:58,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-03 03:29:58,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307714756] [2022-11-03 03:29:58,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:58,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 03:29:58,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 03:29:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1760, Invalid=2272, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 03:29:58,546 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:59,316 INFO L93 Difference]: Finished difference Result 416 states and 598 transitions. [2022-11-03 03:29:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 03:29:59,317 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-03 03:29:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:59,319 INFO L225 Difference]: With dead ends: 416 [2022-11-03 03:29:59,319 INFO L226 Difference]: Without dead ends: 329 [2022-11-03 03:29:59,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1760, Invalid=2272, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 03:29:59,321 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 485 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:59,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 86 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:29:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-03 03:29:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 137. [2022-11-03 03:29:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.2388059701492538) internal successors, (166), 134 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:29:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 168 transitions. [2022-11-03 03:29:59,354 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 168 transitions. Word has length 75 [2022-11-03 03:29:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:59,354 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 168 transitions. [2022-11-03 03:29:59,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 168 transitions. [2022-11-03 03:29:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-03 03:29:59,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:59,356 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:59,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:59,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:29:59,577 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:59,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:59,578 INFO L85 PathProgramCache]: Analyzing trace with hash -758359635, now seen corresponding path program 7 times [2022-11-03 03:29:59,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:59,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822503579] [2022-11-03 03:29:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:59,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 03:30:02,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822503579] [2022-11-03 03:30:02,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822503579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953200065] [2022-11-03 03:30:02,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:30:02,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:02,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:02,511 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:02,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:30:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:30:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 03:30:02,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 03:30:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953200065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [941636072] [2022-11-03 03:30:05,946 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:30:05,946 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:05,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:05,946 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:05,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:05,975 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:30:05,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:30:05,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:05,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:30:05,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:06,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:30:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:06,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:06,054 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:30:06,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-03 03:30:06,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:06,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:30:06,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:30:06,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:30:06,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:30:06,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:06,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:06,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:06,370 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 03:30:06,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-03 03:30:06,679 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:30:06,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:30:06,916 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:30:06,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:30:07,128 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:30:07,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:30:07,246 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:30:07,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:08,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5793#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int)) (and (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) 4))) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|))) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:08,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:08,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:08,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-03 03:30:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253369393] [2022-11-03 03:30:08,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:08,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-03 03:30:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:08,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-03 03:30:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5985, Invalid=6897, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 03:30:08,280 INFO L87 Difference]: Start difference. First operand 137 states and 168 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:11,224 INFO L93 Difference]: Finished difference Result 666 states and 973 transitions. [2022-11-03 03:30:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-03 03:30:11,225 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2022-11-03 03:30:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:11,229 INFO L225 Difference]: With dead ends: 666 [2022-11-03 03:30:11,229 INFO L226 Difference]: Without dead ends: 579 [2022-11-03 03:30:11,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5985, Invalid=6897, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 03:30:11,233 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1109 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:11,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 129 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:30:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-03 03:30:11,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 187. [2022-11-03 03:30:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.173913043478261) internal successors, (216), 184 states have internal predecessors, (216), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2022-11-03 03:30:11,286 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 100 [2022-11-03 03:30:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:11,286 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2022-11-03 03:30:11,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2022-11-03 03:30:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-03 03:30:11,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:11,289 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:11,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:11,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 03:30:11,515 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:11,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash 622135021, now seen corresponding path program 8 times [2022-11-03 03:30:11,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:11,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417574486] [2022-11-03 03:30:11,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:11,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-03 03:30:19,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:19,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417574486] [2022-11-03 03:30:19,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417574486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:19,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854796586] [2022-11-03 03:30:19,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:30:19,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:19,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:19,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:19,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:30:19,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:30:19,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:30:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:30:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:19,954 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:30:19,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 24 [2022-11-03 03:30:19,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 [2022-11-03 03:30:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 4998 trivial. 0 not checked. [2022-11-03 03:30:20,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2022-11-03 03:30:21,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854796586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035665843] [2022-11-03 03:30:21,044 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:30:21,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:21,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:21,045 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:21,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:21,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:21,068 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:30:21,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:30:21,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:21,093 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:30:21,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:30:21,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:21,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:30:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:21,166 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:30:21,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-03 03:30:21,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:21,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:30:21,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:30:21,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:30:21,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:30:21,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:21,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:21,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:30:21,497 INFO L356 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2022-11-03 03:30:21,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 168 [2022-11-03 03:30:21,768 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:30:21,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:30:22,098 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:30:22,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:30:22,559 INFO L356 Elim1Store]: treesize reduction 75, result has 44.9 percent of original size [2022-11-03 03:30:22,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 208 [2022-11-03 03:30:22,775 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:30:22,785 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:24,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8374#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8| Int)) (and (= (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|) 4))) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_8|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:24,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:24,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:24,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 9, 7] total 113 [2022-11-03 03:30:24,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319382886] [2022-11-03 03:30:24,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:24,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-11-03 03:30:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:24,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-11-03 03:30:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6045, Invalid=9705, Unknown=0, NotChecked=0, Total=15750 [2022-11-03 03:30:24,155 INFO L87 Difference]: Start difference. First operand 187 states and 218 transitions. Second operand has 113 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 113 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:45,905 INFO L93 Difference]: Finished difference Result 765 states and 1069 transitions. [2022-11-03 03:30:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 316 states. [2022-11-03 03:30:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 113 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-11-03 03:30:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:45,911 INFO L225 Difference]: With dead ends: 765 [2022-11-03 03:30:45,911 INFO L226 Difference]: Without dead ends: 674 [2022-11-03 03:30:45,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27763 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=28025, Invalid=83197, Unknown=0, NotChecked=0, Total=111222 [2022-11-03 03:30:45,924 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 567 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 1387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1387 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:45,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 853 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1387 Valid, 1447 Invalid, 0 Unknown, 40 Unchecked, 1.7s Time] [2022-11-03 03:30:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-03 03:30:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 205. [2022-11-03 03:30:46,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 202 states have (on average 1.2425742574257426) internal successors, (251), 202 states have internal predecessors, (251), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:30:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 253 transitions. [2022-11-03 03:30:46,035 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 253 transitions. Word has length 150 [2022-11-03 03:30:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:46,036 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 253 transitions. [2022-11-03 03:30:46,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 113 states have internal predecessors, (142), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:30:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 253 transitions. [2022-11-03 03:30:46,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 03:30:46,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:46,039 INFO L195 NwaCegarLoop]: trace histogram [99, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:46,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:46,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:46,255 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1355029692, now seen corresponding path program 1 times [2022-11-03 03:30:46,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:46,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875595441] [2022-11-03 03:30:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5160 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-03 03:30:53,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:53,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875595441] [2022-11-03 03:30:53,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875595441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:53,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150711005] [2022-11-03 03:30:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:53,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:53,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:53,341 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:53,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:30:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:53,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 03:30:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5160 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-03 03:30:53,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5160 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-03 03:31:05,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150711005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:05,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677576220] [2022-11-03 03:31:05,948 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:31:05,948 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:05,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:05,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:05,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:05,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:05,977 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:31:05,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:31:05,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:05,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:31:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:06,066 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:31:06,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-03 03:31:06,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:31:06,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:06,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:06,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:06,167 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:31:06,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 119 [2022-11-03 03:31:06,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:31:06,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:06,265 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:31:06,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 25 [2022-11-03 03:31:06,354 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:31:06,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:31:06,421 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:31:06,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:31:06,509 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2022-11-03 03:31:06,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:08,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11680#(and (exists ((|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) 0))) 1 0)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9|) (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) (< 1 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_9| 4))) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_9|) (+ (- 4) (* |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| 4)))) (<= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_9| 2147483647) (<= 0 |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_9|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:08,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:08,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:08,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-03 03:31:08,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632593660] [2022-11-03 03:31:08,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:08,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-03 03:31:08,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:08,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-03 03:31:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22358, Invalid=24082, Unknown=0, NotChecked=0, Total=46440 [2022-11-03 03:31:08,407 INFO L87 Difference]: Start difference. First operand 205 states and 253 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:25,825 INFO L93 Difference]: Finished difference Result 1210 states and 1806 transitions. [2022-11-03 03:31:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-03 03:31:25,826 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-11-03 03:31:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:25,831 INFO L225 Difference]: With dead ends: 1210 [2022-11-03 03:31:25,832 INFO L226 Difference]: Without dead ends: 1106 [2022-11-03 03:31:25,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5228 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=22358, Invalid=24082, Unknown=0, NotChecked=0, Total=46440 [2022-11-03 03:31:25,841 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 2173 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 1701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2373 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 3858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1701 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:25,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2373 Valid, 259 Invalid, 3858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1701 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 03:31:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-03 03:31:25,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 306. [2022-11-03 03:31:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 303 states have (on average 1.1617161716171618) internal successors, (352), 303 states have internal predecessors, (352), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 03:31:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 354 transitions. [2022-11-03 03:31:25,959 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 354 transitions. Word has length 152 [2022-11-03 03:31:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:25,960 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 354 transitions. [2022-11-03 03:31:25,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:31:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 354 transitions. [2022-11-03 03:31:25,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-03 03:31:25,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:25,964 INFO L195 NwaCegarLoop]: trace histogram [200, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:26,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:26,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:26,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:26,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:26,179 INFO L85 PathProgramCache]: Analyzing trace with hash 532462902, now seen corresponding path program 2 times [2022-11-03 03:31:26,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:26,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321695750] [2022-11-03 03:31:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:26,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20310 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-03 03:31:50,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321695750] [2022-11-03 03:31:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321695750] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236171350] [2022-11-03 03:31:50,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:31:50,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:50,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:50,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:50,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:31:50,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:31:50,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:31:50,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 03:31:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:51,530 INFO L356 Elim1Store]: treesize reduction 63, result has 37.6 percent of original size [2022-11-03 03:31:51,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 54 [2022-11-03 03:31:52,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:52,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:52,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:52,140 INFO L356 Elim1Store]: treesize reduction 37, result has 71.5 percent of original size [2022-11-03 03:31:52,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 130 [2022-11-03 03:31:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20310 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 20272 trivial. 0 not checked. [2022-11-03 03:31:52,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:55,576 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:31:55,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 1 [2022-11-03 03:31:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20310 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 20272 trivial. 0 not checked. [2022-11-03 03:31:55,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236171350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:55,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911995521] [2022-11-03 03:31:55,585 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:31:55,586 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:55,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:55,586 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:55,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,610 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:31:55,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:31:55,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:31:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:55,690 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:31:55,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-03 03:31:55,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:31:55,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:55,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:55,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:55,792 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:31:55,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 119 [2022-11-03 03:31:55,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:31:55,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:55,890 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:31:55,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 30 [2022-11-03 03:31:55,994 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:31:55,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:31:56,100 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:31:56,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:31:56,144 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:31:56,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:57,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16184#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) 4) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_10|) 0))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:31:57,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:57,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:57,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 12, 12] total 221 [2022-11-03 03:31:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184387980] [2022-11-03 03:31:57,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:57,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2022-11-03 03:31:57,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2022-11-03 03:31:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22845, Invalid=31677, Unknown=0, NotChecked=0, Total=54522 [2022-11-03 03:31:57,854 INFO L87 Difference]: Start difference. First operand 306 states and 354 transitions. Second operand has 221 states, 220 states have (on average 1.1454545454545455) internal successors, (252), 220 states have internal predecessors, (252), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:21,573 INFO L93 Difference]: Finished difference Result 488 states and 613 transitions. [2022-11-03 03:32:21,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2022-11-03 03:32:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 220 states have (on average 1.1454545454545455) internal successors, (252), 220 states have internal predecessors, (252), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2022-11-03 03:32:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:21,582 INFO L225 Difference]: With dead ends: 488 [2022-11-03 03:32:21,582 INFO L226 Difference]: Without dead ends: 384 [2022-11-03 03:32:21,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1167 GetRequests, 725 SyntacticMatches, 2 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34720 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=66920, Invalid=128002, Unknown=0, NotChecked=0, Total=194922 [2022-11-03 03:32:21,598 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:21,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 111 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 453 Invalid, 0 Unknown, 162 Unchecked, 0.4s Time] [2022-11-03 03:32:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-03 03:32:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2022-11-03 03:32:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 313 states have (on average 1.1693290734824282) internal successors, (366), 314 states have internal predecessors, (366), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:32:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 370 transitions. [2022-11-03 03:32:21,694 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 370 transitions. Word has length 253 [2022-11-03 03:32:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:21,694 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 370 transitions. [2022-11-03 03:32:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 220 states have (on average 1.1454545454545455) internal successors, (252), 220 states have internal predecessors, (252), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:21,695 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 370 transitions. [2022-11-03 03:32:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-03 03:32:21,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:21,699 INFO L195 NwaCegarLoop]: trace histogram [201, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:21,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:21,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:32:21,915 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:32:21,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash 669982070, now seen corresponding path program 1 times [2022-11-03 03:32:21,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:21,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674107962] [2022-11-03 03:32:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:21,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20512 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-03 03:32:46,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674107962] [2022-11-03 03:32:46,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674107962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816723573] [2022-11-03 03:32:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:46,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:46,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:46,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:46,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:32:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 203 conjunts are in the unsatisfiable core [2022-11-03 03:32:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20512 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-03 03:32:47,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20512 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-03 03:33:35,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816723573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:35,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788254344] [2022-11-03 03:33:35,412 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:33:35,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:35,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:35,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:35,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:35,437 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:33:35,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:33:35,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:35,459 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:33:35,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:33:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:35,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:33:35,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:35,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:35,539 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 03:33:35,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 191 [2022-11-03 03:33:35,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:33:35,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:35,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:35,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:33:35,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:33:35,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:33:35,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:35,733 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:33:35,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 30 [2022-11-03 03:33:35,897 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:33:35,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:33:36,136 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:33:36,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:33:36,295 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:33:36,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:33:36,339 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:33:36,350 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:37,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20057#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_11|) 4))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:37,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:37,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:37,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 406 [2022-11-03 03:33:37,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067138858] [2022-11-03 03:33:37,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:37,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 407 states [2022-11-03 03:33:37,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 407 interpolants. [2022-11-03 03:33:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86310, Invalid=89670, Unknown=0, NotChecked=0, Total=175980 [2022-11-03 03:33:37,547 INFO L87 Difference]: Start difference. First operand 318 states and 370 transitions. Second operand has 407 states, 407 states have (on average 1.0393120393120394) internal successors, (423), 406 states have internal predecessors, (423), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:44,026 INFO L93 Difference]: Finished difference Result 2252 states and 3366 transitions. [2022-11-03 03:37:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2022-11-03 03:37:44,027 INFO L78 Accepts]: Start accepts. Automaton has has 407 states, 407 states have (on average 1.0393120393120394) internal successors, (423), 406 states have internal predecessors, (423), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-11-03 03:37:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:44,038 INFO L225 Difference]: With dead ends: 2252 [2022-11-03 03:37:44,039 INFO L226 Difference]: Without dead ends: 2137 [2022-11-03 03:37:44,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10546 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=86310, Invalid=89670, Unknown=0, NotChecked=0, Total=175980 [2022-11-03 03:37:44,052 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 5752 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 4543 mSolverCounterSat, 4853 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6156 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 9396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4853 IncrementalHoareTripleChecker+Valid, 4543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:44,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6156 Valid, 449 Invalid, 9396 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4853 Valid, 4543 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 03:37:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-11-03 03:37:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 521. [2022-11-03 03:37:44,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 516 states have (on average 1.1027131782945736) internal successors, (569), 517 states have internal predecessors, (569), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:37:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 573 transitions. [2022-11-03 03:37:44,318 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 573 transitions. Word has length 255 [2022-11-03 03:37:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:44,319 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 573 transitions. [2022-11-03 03:37:44,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 407 states, 407 states have (on average 1.0393120393120394) internal successors, (423), 406 states have internal predecessors, (423), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 573 transitions. [2022-11-03 03:37:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-11-03 03:37:44,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:44,327 INFO L195 NwaCegarLoop]: trace histogram [404, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:44,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:44,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:37:44,543 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:37:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:44,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1301446276, now seen corresponding path program 2 times [2022-11-03 03:37:44,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:37:44,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599634157] [2022-11-03 03:37:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:37:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:39:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 82021 backedges. 0 proven. 81810 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-03 03:39:33,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:39:33,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599634157] [2022-11-03 03:39:33,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599634157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:39:33,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975498435] [2022-11-03 03:39:33,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:39:33,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:39:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:39:33,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:39:33,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_995939bf-6053-43c3-aa36-b4a2ea07a36f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:39:33,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:39:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:39:33,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:39:33,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:39:36,877 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:39:36,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 03:39:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 82021 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 81982 trivial. 0 not checked. [2022-11-03 03:39:37,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:39:38,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-11-03 03:39:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 82021 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 81982 trivial. 0 not checked. [2022-11-03 03:39:40,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975498435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:39:40,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1559728874] [2022-11-03 03:39:40,332 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:39:40,332 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:39:40,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:39:40,333 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:39:40,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:39:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,360 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:39:40,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 03:39:40,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,387 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:39:40,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 03:39:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:39:40,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:40,460 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 03:39:40,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 190 [2022-11-03 03:39:40,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:39:40,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:39:40,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:39:40,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-03 03:39:40,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 118 [2022-11-03 03:39:40,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:39:40,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:39:40,665 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 03:39:40,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 30 [2022-11-03 03:39:40,811 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:39:40,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:39:41,107 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:39:41,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:39:41,293 INFO L356 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-03 03:39:41,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-03 03:39:41,342 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-03 03:39:41,353 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:39:43,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28295#(and (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_12| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_12|) (= |__VERIFIER_assert_#in~cond| (ite (not (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_12|) 0) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_12|) 4))) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:39:43,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:39:43,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:39:43,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [406, 13, 13] total 427 [2022-11-03 03:39:43,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088722810] [2022-11-03 03:39:43,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:39:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2022-11-03 03:39:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:39:43,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2022-11-03 03:39:43,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87221, Invalid=105939, Unknown=0, NotChecked=0, Total=193160 [2022-11-03 03:39:43,670 INFO L87 Difference]: Start difference. First operand 521 states and 573 transitions. Second operand has 427 states, 426 states have (on average 1.0774647887323943) internal successors, (459), 426 states have internal predecessors, (459), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)