./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:08:12,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:08:12,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:08:13,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:08:13,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:08:13,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:08:13,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:08:13,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:08:13,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:08:13,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:08:13,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:08:13,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:08:13,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:08:13,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:08:13,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:08:13,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:08:13,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:08:13,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:08:13,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:08:13,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:08:13,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:08:13,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:08:13,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:08:13,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:08:13,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:08:13,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:08:13,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:08:13,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:08:13,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:08:13,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:08:13,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:08:13,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:08:13,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:08:13,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:08:13,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:08:13,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:08:13,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:08:13,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:08:13,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:08:13,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:08:13,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:08:13,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:08:13,038 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:08:13,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:08:13,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:08:13,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:08:13,039 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:08:13,039 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:08:13,039 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:08:13,039 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:08:13,040 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:08:13,040 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:08:13,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:08:13,041 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:08:13,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:08:13,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:08:13,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:08:13,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:08:13,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:08:13,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:08:13,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:08:13,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:08:13,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:08:13,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:08:13,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:08:13,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:08:13,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:08:13,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:08:13,043 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:08:13,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:08:13,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:08:13,043 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:08:13,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:08:13,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:08:13,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:08:13,044 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_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-12-14 08:08:13,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:08:13,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:08:13,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:08:13,239 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:08:13,239 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:08:13,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-12-14 08:08:15,886 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:08:16,048 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:08:16,048 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-12-14 08:08:16,053 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/data/d89f59ea2/29e4e09e7e774aceb4bae28de54c1568/FLAG1da45322f [2022-12-14 08:08:16,448 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/data/d89f59ea2/29e4e09e7e774aceb4bae28de54c1568 [2022-12-14 08:08:16,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:08:16,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:08:16,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:08:16,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:08:16,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:08:16,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1853557a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16, skipping insertion in model container [2022-12-14 08:08:16,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:08:16,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:08:16,583 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-12-14 08:08:16,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:08:16,616 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:08:16,626 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-12-14 08:08:16,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:08:16,647 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:08:16,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16 WrapperNode [2022-12-14 08:08:16,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:08:16,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:08:16,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:08:16,649 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:08:16,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,675 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 125 [2022-12-14 08:08:16,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:08:16,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:08:16,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:08:16,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:08:16,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,686 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,699 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:08:16,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:08:16,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:08:16,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:08:16,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (1/1) ... [2022-12-14 08:08:16,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:08:16,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:16,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:08:16,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:08:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:08:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 08:08:16,763 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 08:08:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:08:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:08:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:08:16,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:08:16,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:08:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:08:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-12-14 08:08:16,764 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-12-14 08:08:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:08:16,835 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:08:16,837 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:08:17,045 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:08:17,097 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:08:17,097 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-14 08:08:17,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:08:17 BoogieIcfgContainer [2022-12-14 08:08:17,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:08:17,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:08:17,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:08:17,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:08:17,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:08:16" (1/3) ... [2022-12-14 08:08:17,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8504071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:08:17, skipping insertion in model container [2022-12-14 08:08:17,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:16" (2/3) ... [2022-12-14 08:08:17,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8504071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:08:17, skipping insertion in model container [2022-12-14 08:08:17,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:08:17" (3/3) ... [2022-12-14 08:08:17,109 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-12-14 08:08:17,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:08:17,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:08:17,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:08:17,179 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;@36ea2a7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:08:17,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:08:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:08:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 08:08:17,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:17,192 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:17,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:17,198 INFO L85 PathProgramCache]: Analyzing trace with hash -316911424, now seen corresponding path program 1 times [2022-12-14 08:08:17,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:17,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665193940] [2022-12-14 08:08:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:08:17,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:17,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665193940] [2022-12-14 08:08:17,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665193940] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:17,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:08:17,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:08:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713201122] [2022-12-14 08:08:17,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:17,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:08:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:17,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:08:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:08:17,704 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:08:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:17,885 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2022-12-14 08:08:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:08:17,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2022-12-14 08:08:17,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:17,894 INFO L225 Difference]: With dead ends: 63 [2022-12-14 08:08:17,894 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 08:08:17,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:08:17,899 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:17,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 85 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:08:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 08:08:17,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 25. [2022-12-14 08:08:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:08:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-12-14 08:08:17,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 24 [2022-12-14 08:08:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:17,931 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-12-14 08:08:17,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:08:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-12-14 08:08:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 08:08:17,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:17,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:17,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:08:17,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:17,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:17,934 INFO L85 PathProgramCache]: Analyzing trace with hash -836108414, now seen corresponding path program 1 times [2022-12-14 08:08:17,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:17,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461282753] [2022-12-14 08:08:17,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:17,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:08:18,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461282753] [2022-12-14 08:08:18,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461282753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:08:18,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958168213] [2022-12-14 08:08:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:18,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:18,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:18,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:18,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:08:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 08:08:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:18,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:08:18,807 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 08:08:18,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 23 [2022-12-14 08:08:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:08:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:08:18,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-14 08:08:18,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 08:08:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:08:18,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958168213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:18,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587360201] [2022-12-14 08:08:18,972 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 08:08:18,972 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:08:18,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:08:18,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:08:18,981 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:08:19,259 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-12-14 08:08:19,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 215 treesize of output 217 [2022-12-14 08:08:19,309 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-12-14 08:08:19,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 217 [2022-12-14 08:08:19,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:08:19,698 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 08:08:19,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 241 treesize of output 244 [2022-12-14 08:08:19,767 INFO L321 Elim1Store]: treesize reduction 116, result has 17.7 percent of original size [2022-12-14 08:08:19,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 242 treesize of output 248 [2022-12-14 08:08:19,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:08:19,994 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:08:20,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:08:20,180 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:08:20,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 08:08:20,332 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:08:20,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 349 treesize of output 346 [2022-12-14 08:08:20,477 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-12-14 08:08:20,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 336 [2022-12-14 08:08:20,501 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-12-14 08:08:20,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 335 treesize of output 332 [2022-12-14 08:08:21,073 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 08:08:21,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:08:21,080 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:08:21,081 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:08:25,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [587360201] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:25,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:08:25,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [11, 10, 8] total 39 [2022-12-14 08:08:25,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749940419] [2022-12-14 08:08:25,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:25,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 08:08:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:25,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 08:08:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1304, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 08:08:25,688 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:08:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:26,747 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2022-12-14 08:08:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 08:08:26,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-12-14 08:08:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:26,749 INFO L225 Difference]: With dead ends: 55 [2022-12-14 08:08:26,749 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 08:08:26,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 08:08:26,750 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:26,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 98 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:08:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 08:08:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-12-14 08:08:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 08:08:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-12-14 08:08:26,760 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 25 [2022-12-14 08:08:26,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:26,761 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-12-14 08:08:26,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:08:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-12-14 08:08:26,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 08:08:26,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:26,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:26,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:08:26,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 08:08:26,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1147529129, now seen corresponding path program 1 times [2022-12-14 08:08:26,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:26,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243389203] [2022-12-14 08:08:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:26,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:08:27,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:27,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243389203] [2022-12-14 08:08:27,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243389203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:08:27,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122694929] [2022-12-14 08:08:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:27,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:27,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:27,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:27,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:08:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:27,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 08:08:27,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:27,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:08:27,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:08:27,269 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:08:27,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 08:08:27,299 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_53 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_53))) is different from true [2022-12-14 08:08:27,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 08:08:27,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 08:08:27,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-12-14 08:08:27,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 08:08:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2022-12-14 08:08:27,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:03,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122694929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:03,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730738815] [2022-12-14 08:09:03,787 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 08:09:03,787 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:03,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:03,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:03,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:04,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:09:04,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:09:04,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:04,130 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:09:04,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:09:04,157 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:09:04,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:09:04,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:04,258 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:04,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:04,368 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:04,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 08:09:04,458 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:09:04,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 232 [2022-12-14 08:09:04,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:04,525 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:09:04,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:09:04,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:09:04,733 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:09:04,760 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:09:04,761 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:07,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1730738815] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:07,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:09:07,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 15] total 37 [2022-12-14 08:09:07,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266948756] [2022-12-14 08:09:07,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:07,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 08:09:07,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 08:09:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1457, Unknown=19, NotChecked=78, Total=1722 [2022-12-14 08:09:07,069 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:09:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:09,664 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-12-14 08:09:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 08:09:09,665 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2022-12-14 08:09:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:09,666 INFO L225 Difference]: With dead ends: 58 [2022-12-14 08:09:09,666 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 08:09:09,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=390, Invalid=2457, Unknown=19, NotChecked=104, Total=2970 [2022-12-14 08:09:09,668 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:09,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 63 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:09:09,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 08:09:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-12-14 08:09:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 08:09:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2022-12-14 08:09:09,683 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 26 [2022-12-14 08:09:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:09,683 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2022-12-14 08:09:09,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:09:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2022-12-14 08:09:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:09:09,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:09,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:09,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 08:09:09,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:09,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1985606588, now seen corresponding path program 1 times [2022-12-14 08:09:09,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:09,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380569320] [2022-12-14 08:09:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:09,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:09:10,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:10,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380569320] [2022-12-14 08:09:10,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380569320] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:10,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986922981] [2022-12-14 08:09:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:10,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:10,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:10,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:10,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:09:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:10,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:09:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:09:10,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:09:10,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986922981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:10,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360475157] [2022-12-14 08:09:10,142 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-12-14 08:09:10,142 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:10,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:10,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:10,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:10,309 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 08:09:10,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 229 [2022-12-14 08:09:10,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 217 [2022-12-14 08:09:10,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:10,628 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 08:09:10,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 268 [2022-12-14 08:09:10,696 INFO L321 Elim1Store]: treesize reduction 116, result has 17.7 percent of original size [2022-12-14 08:09:10,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 266 treesize of output 272 [2022-12-14 08:09:10,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:10,887 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:11,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:11,089 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:11,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 08:09:11,231 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:09:11,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 373 treesize of output 370 [2022-12-14 08:09:11,362 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-12-14 08:09:11,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 364 treesize of output 360 [2022-12-14 08:09:11,381 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-12-14 08:09:11,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 359 treesize of output 356 [2022-12-14 08:09:12,311 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 08:09:12,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:12,320 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:09:12,321 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:17,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1016#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_upsweep_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 1 |ULTIMATE.start_main_~space~1#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_~n#1| 1) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~n#1| 1) (<= 1 |ULTIMATE.start_upsweep_#res#1|) (<= |ULTIMATE.start_main_~space~1#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_#in~n#1| 1) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 1 |ULTIMATE.start_downsweep_#in~space#1|) (<= |ULTIMATE.start_main_~i~1#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 1) (<= |ULTIMATE.start_downsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_~x#1| 1) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:09:17,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:17,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:17,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-12-14 08:09:17,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003681881] [2022-12-14 08:09:17,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:09:17,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:09:17,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-12-14 08:09:17,076 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:17,285 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-12-14 08:09:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:09:17,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-12-14 08:09:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:17,286 INFO L225 Difference]: With dead ends: 76 [2022-12-14 08:09:17,286 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 08:09:17,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 08:09:17,288 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 49 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:17,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 218 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:17,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 08:09:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2022-12-14 08:09:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 08:09:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2022-12-14 08:09:17,312 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 28 [2022-12-14 08:09:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:17,312 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2022-12-14 08:09:17,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2022-12-14 08:09:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 08:09:17,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:17,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:17,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:09:17,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:17,515 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash 91873026, now seen corresponding path program 1 times [2022-12-14 08:09:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:17,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560290066] [2022-12-14 08:09:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 08:09:17,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:17,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560290066] [2022-12-14 08:09:17,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560290066] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:17,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329158705] [2022-12-14 08:09:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:17,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:17,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:17,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:17,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:09:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:17,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:09:17,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:09:17,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:09:17,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329158705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:17,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1398314801] [2022-12-14 08:09:17,768 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-12-14 08:09:17,769 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:17,769 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:17,769 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:17,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:17,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:09:17,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:09:17,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:18,053 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:09:18,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:09:18,070 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:09:18,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:09:18,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:18,147 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:18,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:18,221 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:18,273 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 08:09:18,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 08:09:18,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:18,318 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:09:18,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:09:18,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:09:18,469 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:09:18,491 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:09:18,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:21,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1398314801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:21,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:21,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 5, 5] total 30 [2022-12-14 08:09:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409171738] [2022-12-14 08:09:21,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:21,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:09:21,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:21,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:09:21,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-12-14 08:09:21,194 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:09:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:24,599 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2022-12-14 08:09:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 08:09:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-12-14 08:09:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:24,600 INFO L225 Difference]: With dead ends: 75 [2022-12-14 08:09:24,600 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 08:09:24,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=294, Invalid=1598, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 08:09:24,601 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 68 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:24,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 64 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:09:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 08:09:24,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2022-12-14 08:09:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 08:09:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2022-12-14 08:09:24,620 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 28 [2022-12-14 08:09:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:24,620 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2022-12-14 08:09:24,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:09:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2022-12-14 08:09:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 08:09:24,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:24,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:24,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:09:24,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:24,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1160082938, now seen corresponding path program 2 times [2022-12-14 08:09:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:24,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088463934] [2022-12-14 08:09:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:09:24,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:24,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088463934] [2022-12-14 08:09:24,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088463934] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:24,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101627866] [2022-12-14 08:09:24,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:09:24,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:24,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:24,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:24,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:09:25,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:09:25,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:09:25,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:09:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:09:25,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:09:25,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101627866] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:25,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872567109] [2022-12-14 08:09:25,062 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-12-14 08:09:25,063 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:25,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:25,063 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:25,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:25,215 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 08:09:25,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 229 [2022-12-14 08:09:25,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 217 [2022-12-14 08:09:25,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:25,528 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-12-14 08:09:25,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 268 [2022-12-14 08:09:25,593 INFO L321 Elim1Store]: treesize reduction 116, result has 17.7 percent of original size [2022-12-14 08:09:25,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 266 treesize of output 272 [2022-12-14 08:09:25,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:25,798 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:25,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:25,984 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:26,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 08:09:26,127 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:09:26,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 379 treesize of output 376 [2022-12-14 08:09:26,271 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-12-14 08:09:26,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 370 treesize of output 366 [2022-12-14 08:09:26,296 INFO L321 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2022-12-14 08:09:26,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 365 treesize of output 362 [2022-12-14 08:09:27,285 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-12-14 08:09:27,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:27,293 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:09:27,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:32,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1863#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_upsweep_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 1 |ULTIMATE.start_main_~space~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_~n#1| 1) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~n#1| 1) (<= 1 |ULTIMATE.start_upsweep_#res#1|) (<= |ULTIMATE.start_main_~space~1#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_#in~n#1| 1) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 1 |ULTIMATE.start_downsweep_#in~space#1|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_upsweep_#in~n#1| 1) (<= |ULTIMATE.start_downsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_~x#1| 1) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (or (and (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_main_~i~1#1| 1) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_main_~i~1#1| 0) (= |#NULL.base| 0))) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 1) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:09:32,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:32,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:32,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-12-14 08:09:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507070562] [2022-12-14 08:09:32,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 08:09:32,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 08:09:32,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-12-14 08:09:32,179 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:32,365 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2022-12-14 08:09:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:09:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-12-14 08:09:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:32,366 INFO L225 Difference]: With dead ends: 60 [2022-12-14 08:09:32,366 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 08:09:32,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 08:09:32,367 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:32,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 08:09:32,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-12-14 08:09:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:09:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2022-12-14 08:09:32,379 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 29 [2022-12-14 08:09:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:32,379 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2022-12-14 08:09:32,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2022-12-14 08:09:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 08:09:32,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:32,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:32,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:09:32,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 08:09:32,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:32,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash 966051846, now seen corresponding path program 1 times [2022-12-14 08:09:32,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:32,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669780396] [2022-12-14 08:09:32,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:32,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:09:32,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:32,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669780396] [2022-12-14 08:09:32,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669780396] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:32,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058202757] [2022-12-14 08:09:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:32,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:32,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:32,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:32,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:09:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:32,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:09:32,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:09:32,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:09:32,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058202757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651488257] [2022-12-14 08:09:32,811 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-12-14 08:09:32,811 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:32,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:32,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:32,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:33,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:09:33,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:09:33,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:33,165 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:09:33,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:09:33,182 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:09:33,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:09:33,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:33,281 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:33,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:33,354 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:33,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 08:09:33,437 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:09:33,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 245 [2022-12-14 08:09:33,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:33,484 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:09:33,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:09:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:33,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:09:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:33,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:09:33,683 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 08:09:33,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-12-14 08:09:33,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:09:33,851 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:09:33,872 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:09:33,873 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:36,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2235#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_downsweep_~a#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4))) 0) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= (ite (and (< |ULTIMATE.start_downsweep_#in~space#1| 0) (not (= (mod |ULTIMATE.start_downsweep_#in~space#1| 2) 0))) (+ (div |ULTIMATE.start_downsweep_#in~space#1| 2) 1) (div |ULTIMATE.start_downsweep_#in~space#1| 2)) |ULTIMATE.start_downsweep_~space#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (not (< |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~n#1|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 08:09:36,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:36,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:36,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-12-14 08:09:36,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855423509] [2022-12-14 08:09:36,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:36,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:09:36,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:36,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:09:36,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:09:36,332 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:36,420 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-12-14 08:09:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:09:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-12-14 08:09:36,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:36,421 INFO L225 Difference]: With dead ends: 39 [2022-12-14 08:09:36,421 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 08:09:36,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-12-14 08:09:36,422 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:36,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 108 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 08:09:36,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 08:09:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:09:36,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-12-14 08:09:36,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 29 [2022-12-14 08:09:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:36,431 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-12-14 08:09:36,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-12-14 08:09:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 08:09:36,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:36,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:36,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 08:09:36,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:09:36,633 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash 227143670, now seen corresponding path program 2 times [2022-12-14 08:09:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:36,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839100362] [2022-12-14 08:09:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:36,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:09:36,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:36,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839100362] [2022-12-14 08:09:36,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839100362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:36,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014468556] [2022-12-14 08:09:36,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:09:36,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:36,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:36,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:09:36,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 08:09:36,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:09:36,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 08:09:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:36,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:09:36,971 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-12-14 08:09:36,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2022-12-14 08:09:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:09:36,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:09:36,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014468556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:09:36,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:09:36,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-14 08:09:36,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199991848] [2022-12-14 08:09:36,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:09:36,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:09:36,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:36,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:09:36,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:09:36,983 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:37,151 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-12-14 08:09:37,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:09:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-12-14 08:09:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:37,152 INFO L225 Difference]: With dead ends: 42 [2022-12-14 08:09:37,152 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 08:09:37,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:09:37,153 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:37,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 68 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 08:09:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-12-14 08:09:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:09:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-12-14 08:09:37,165 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2022-12-14 08:09:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:37,165 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-12-14 08:09:37,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:37,165 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-12-14 08:09:37,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 08:09:37,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:37,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:37,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 08:09:37,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:37,368 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1184314758, now seen corresponding path program 1 times [2022-12-14 08:09:37,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:37,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834034988] [2022-12-14 08:09:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:37,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:09:37,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834034988] [2022-12-14 08:09:37,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834034988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090977900] [2022-12-14 08:09:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:37,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:37,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:37,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:09:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:37,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:09:37,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:09:37,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:09:37,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090977900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:37,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134202729] [2022-12-14 08:09:37,682 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 08:09:37,682 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:37,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:37,682 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:37,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:37,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:09:37,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:09:37,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:37,951 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:09:37,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:09:37,973 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:09:37,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:09:38,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:38,067 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:38,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:38,142 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:38,196 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 08:09:38,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 08:09:38,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:38,239 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:09:38,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:09:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:09:38,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:38,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:09:38,446 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 08:09:38,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-12-14 08:09:38,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:09:38,701 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:09:38,723 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:09:38,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:41,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2790#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:09:41,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:41,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:41,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-12-14 08:09:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932215020] [2022-12-14 08:09:41,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:41,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:09:41,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:09:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 08:09:41,030 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:41,130 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-12-14 08:09:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:09:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-12-14 08:09:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:41,131 INFO L225 Difference]: With dead ends: 39 [2022-12-14 08:09:41,131 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 08:09:41,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 08:09:41,132 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:41,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 142 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:09:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 08:09:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 08:09:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:09:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-12-14 08:09:41,150 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 32 [2022-12-14 08:09:41,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:41,150 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-12-14 08:09:41,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:09:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-12-14 08:09:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 08:09:41,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:41,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:09:41,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:09:41,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:41,354 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:09:41,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:41,355 INFO L85 PathProgramCache]: Analyzing trace with hash 319410183, now seen corresponding path program 1 times [2022-12-14 08:09:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:09:41,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121633053] [2022-12-14 08:09:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:41,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:09:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:09:42,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:09:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121633053] [2022-12-14 08:09:42,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121633053] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:09:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228457445] [2022-12-14 08:09:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:09:42,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:42,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:42,625 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:42,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:09:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:09:42,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 08:09:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:42,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:09:42,957 INFO L321 Elim1Store]: treesize reduction 126, result has 11.3 percent of original size [2022-12-14 08:09:42,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 30 [2022-12-14 08:09:43,058 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 08:09:43,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2022-12-14 08:09:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:09:43,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:43,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-12-14 08:09:43,318 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 08:09:43,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 906 treesize of output 786 [2022-12-14 08:09:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:09:43,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228457445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:43,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030563412] [2022-12-14 08:09:43,758 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 08:09:43,758 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:09:43,759 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:09:43,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:09:43,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:09:43,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:09:43,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:09:43,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:09:44,062 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:09:44,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:09:44,087 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:09:44,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:09:44,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:44,178 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:44,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:09:44,276 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:09:44,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-12-14 08:09:44,373 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:09:44,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 245 [2022-12-14 08:09:44,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:09:44,424 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:09:44,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:09:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:44,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:09:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:44,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:09:44,633 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-12-14 08:09:44,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2022-12-14 08:09:44,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:09:44,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:44,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:44,748 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-12-14 08:09:44,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 64 [2022-12-14 08:09:44,819 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:09:44,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:09:44,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:44,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:44,960 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:09:44,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 180 [2022-12-14 08:09:45,068 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:09:45,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:09:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:09:45,410 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:09:45,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 180 [2022-12-14 08:09:45,534 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:09:45,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:09:45,645 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:09:45,666 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:09:45,667 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:09:54,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3168#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (or (and (<= |ULTIMATE.start_downsweep_~n#1| |ULTIMATE.start_downsweep_~right~1#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~right~1#1| 1)) (exists ((|v_ULTIMATE.start_downsweep_~space#1_33| Int)) (and (= (ite (and (< |v_ULTIMATE.start_downsweep_~space#1_33| 0) (not (= (mod |v_ULTIMATE.start_downsweep_~space#1_33| 2) 0))) (+ 1 (div |v_ULTIMATE.start_downsweep_~space#1_33| 2)) (div |v_ULTIMATE.start_downsweep_~space#1_33| 2)) |ULTIMATE.start_downsweep_~space#1|) (<= 0 |v_ULTIMATE.start_downsweep_~space#1_33|))) (= |#NULL.base| 0)) (and (= (select (select |#memory_int| |ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4))) 0) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (= (ite (and (< |ULTIMATE.start_downsweep_#in~space#1| 0) (not (= (mod |ULTIMATE.start_downsweep_#in~space#1| 2) 0))) (+ (div |ULTIMATE.start_downsweep_#in~space#1| 2) 1) (div |ULTIMATE.start_downsweep_#in~space#1| 2)) |ULTIMATE.start_downsweep_~space#1|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (<= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_~space~0#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= |#NULL.base| 0))) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-12-14 08:09:54,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:09:54,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:09:54,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 12] total 39 [2022-12-14 08:09:54,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438586172] [2022-12-14 08:09:54,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:54,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 08:09:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:09:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 08:09:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3278, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 08:09:54,182 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 39 states, 34 states have (on average 1.588235294117647) internal successors, (54), 37 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 08:10:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:01,720 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2022-12-14 08:10:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 08:10:01,720 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 1.588235294117647) internal successors, (54), 37 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2022-12-14 08:10:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:01,720 INFO L225 Difference]: With dead ends: 113 [2022-12-14 08:10:01,720 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 08:10:01,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1397, Invalid=9945, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 08:10:01,722 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 399 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:01,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 200 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 08:10:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 08:10:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 41. [2022-12-14 08:10:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:10:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-12-14 08:10:01,742 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 33 [2022-12-14 08:10:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:10:01,742 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-12-14 08:10:01,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 1.588235294117647) internal successors, (54), 37 states have internal predecessors, (54), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 08:10:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-12-14 08:10:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 08:10:01,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:10:01,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:10:01,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:10:01,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:10:01,943 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:10:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:10:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2026580144, now seen corresponding path program 1 times [2022-12-14 08:10:01,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:10:01,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943470197] [2022-12-14 08:10:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:10:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:10:02,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:10:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943470197] [2022-12-14 08:10:02,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943470197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:10:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894981125] [2022-12-14 08:10:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:02,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:10:02,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:10:02,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:10:02,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:10:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:02,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:10:02,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:10:02,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:10:02,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894981125] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:10:02,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:10:02,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2022-12-14 08:10:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178247321] [2022-12-14 08:10:02,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:10:02,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:10:02,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:10:02,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:10:02,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:10:02,149 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:10:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:02,207 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-12-14 08:10:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:10:02,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-12-14 08:10:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:02,208 INFO L225 Difference]: With dead ends: 51 [2022-12-14 08:10:02,208 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 08:10:02,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:10:02,209 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:02,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:10:02,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 08:10:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-12-14 08:10:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:10:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2022-12-14 08:10:02,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 33 [2022-12-14 08:10:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:10:02,241 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2022-12-14 08:10:02,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:10:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2022-12-14 08:10:02,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 08:10:02,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:10:02,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:10:02,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 08:10:02,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 08:10:02,443 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:10:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:10:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2093960801, now seen corresponding path program 1 times [2022-12-14 08:10:02,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:10:02,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410344901] [2022-12-14 08:10:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:02,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:10:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:10:03,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:10:03,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410344901] [2022-12-14 08:10:03,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410344901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:10:03,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858598983] [2022-12-14 08:10:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:10:03,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:10:03,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:10:03,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:10:03,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:10:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:10:03,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 116 conjunts are in the unsatisfiable core [2022-12-14 08:10:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:03,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:10:03,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:10:04,043 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:10:04,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 08:10:04,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 08:10:04,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 08:10:04,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 08:10:04,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2022-12-14 08:10:04,395 INFO L350 Elim1Store]: Elim1 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2022-12-14 08:10:04,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 86 [2022-12-14 08:10:05,099 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 203 treesize of output 189 [2022-12-14 08:10:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:10:05,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:11:54,752 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_upsweep_~left~0#1| Int) (|ULTIMATE.start_check_~a0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_upsweep_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (v_ArrVal_316 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse7 (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (store .cse7 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse7) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)))))) (let ((.cse3 (store (let ((.cse5 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4) |ULTIMATE.start_upsweep_~a#1.offset|))) (store .cse5 .cse6 (+ (select .cse5 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (select .cse5 .cse6)))) (+ (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_316))) (let ((.cse0 (select .cse3 .cse4))) (or (not (= .cse0 0)) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse3 .cse4 (+ .cse0 .cse1)) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_check_~a0#1.offset|))) (< |v_ULTIMATE.start_downsweep_~n#1_19| 2))))))) is different from false [2022-12-14 08:11:56,832 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_upsweep_~left~0#1| Int) (|ULTIMATE.start_check_~a0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_19| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|ULTIMATE.start_upsweep_~a#1.offset| Int) (|v_ULTIMATE.start_downsweep_~n#1_19| Int) (v_ArrVal_316 Int)) (let ((.cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (let ((.cse7 (let ((.cse8 ((as const (Array Int Int)) 0))) (store .cse8 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse8) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse7 (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse7) |c_ULTIMATE.start_main_~a~0#1.base|) .cse4)))))) (let ((.cse3 (store (let ((.cse5 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_19| 4) |ULTIMATE.start_upsweep_~a#1.offset|))) (store .cse5 .cse6 (+ (select .cse5 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (select .cse5 .cse6)))) (+ (* |v_ULTIMATE.start_downsweep_~n#1_19| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_316))) (let ((.cse0 (select .cse3 .cse4))) (or (not (= .cse0 0)) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse3 .cse4 (+ .cse1 .cse0)) |c_ULTIMATE.start_main_~a~0#1.offset| .cse0)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_check_~a0#1.offset|))) (< |v_ULTIMATE.start_downsweep_~n#1_19| 2))))))) is different from false [2022-12-14 08:11:56,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858598983] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:11:56,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1558918181] [2022-12-14 08:11:56,842 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:11:56,842 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:11:56,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:11:56,842 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:11:56,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:11:57,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:11:57,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:11:57,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:11:57,124 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:11:57,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:11:57,148 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:11:57,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:11:57,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:11:57,218 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:11:57,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:11:57,283 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:11:57,340 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 08:11:57,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 08:11:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:11:57,382 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:11:57,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:11:57,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:11:57,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 08:11:57,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:11:57,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:11:57,582 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 08:11:57,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-12-14 08:11:57,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:11:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:11:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:11:57,688 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:11:57,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 76 [2022-12-14 08:11:57,756 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:11:57,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:11:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:11:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:11:57,886 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:11:57,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-12-14 08:11:57,982 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:11:57,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:11:58,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:11:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:11:58,556 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:11:58,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-12-14 08:11:58,661 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:11:58,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:11:58,736 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:11:58,753 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:11:58,754 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:12:07,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4015#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:12:07,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:07,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:12:07,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 41 [2022-12-14 08:12:07,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563943876] [2022-12-14 08:12:07,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:07,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 08:12:07,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 08:12:07,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=5335, Unknown=41, NotChecked=298, Total=6006 [2022-12-14 08:12:07,348 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand has 41 states, 35 states have (on average 1.4) internal successors, (49), 37 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 08:12:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:16,339 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-12-14 08:12:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 08:12:16,339 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.4) internal successors, (49), 37 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2022-12-14 08:12:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:16,340 INFO L225 Difference]: With dead ends: 104 [2022-12-14 08:12:16,340 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 08:12:16,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3780 ImplicationChecksByTransitivity, 129.2s TimeCoverageRelationStatistics Valid=1645, Invalid=13328, Unknown=41, NotChecked=486, Total=15500 [2022-12-14 08:12:16,342 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 586 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:16,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 121 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 08:12:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 08:12:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 45. [2022-12-14 08:12:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-12-14 08:12:16,376 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 36 [2022-12-14 08:12:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:16,377 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-12-14 08:12:16,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.4) internal successors, (49), 37 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 08:12:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-12-14 08:12:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 08:12:16,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:16,378 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:16,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 08:12:16,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:16,579 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:16,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:16,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1076410105, now seen corresponding path program 2 times [2022-12-14 08:12:16,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:16,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513217912] [2022-12-14 08:12:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:16,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 08:12:16,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:16,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513217912] [2022-12-14 08:12:16,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513217912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:16,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140197306] [2022-12-14 08:12:16,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:12:16,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:16,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:16,756 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:16,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:12:16,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:12:16,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:12:16,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:12:16,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:12:16,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 08:12:16,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140197306] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:12:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636929064] [2022-12-14 08:12:16,986 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:12:16,986 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:16,986 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:16,987 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:16,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:12:17,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:17,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:12:17,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:12:17,294 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:12:17,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:12:17,313 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:12:17,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:12:17,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:17,378 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:17,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:17,443 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:17,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 08:12:17,532 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:12:17,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 241 treesize of output 238 [2022-12-14 08:12:17,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:17,577 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:12:17,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:12:17,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:17,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 08:12:17,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:17,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:17,779 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 08:12:17,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-12-14 08:12:17,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:12:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:17,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:17,890 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:12:17,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 78 [2022-12-14 08:12:17,945 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:17,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:18,077 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-12-14 08:12:18,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 166 [2022-12-14 08:12:18,186 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:12:18,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:12:18,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:18,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:18,707 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:12:18,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-12-14 08:12:18,816 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:12:18,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:12:18,902 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:12:18,920 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:12:18,920 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:12:24,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4618#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:12:24,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:24,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:12:24,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-12-14 08:12:24,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670351928] [2022-12-14 08:12:24,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:24,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 08:12:24,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 08:12:24,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 08:12:24,023 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:12:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:24,190 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2022-12-14 08:12:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:12:24,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-12-14 08:12:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:24,191 INFO L225 Difference]: With dead ends: 63 [2022-12-14 08:12:24,191 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 08:12:24,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 08:12:24,192 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:24,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 146 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:12:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 08:12:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 08:12:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-12-14 08:12:24,211 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 39 [2022-12-14 08:12:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:24,211 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-12-14 08:12:24,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:12:24,212 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-12-14 08:12:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 08:12:24,212 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:24,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:24,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 08:12:24,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 08:12:24,413 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:24,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:24,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1395606775, now seen corresponding path program 3 times [2022-12-14 08:12:24,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:24,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084351010] [2022-12-14 08:12:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:24,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 08:12:24,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:24,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084351010] [2022-12-14 08:12:24,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084351010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:24,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234974652] [2022-12-14 08:12:24,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:12:24,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:24,544 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:24,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:12:24,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:12:24,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:12:24,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:12:24,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 08:12:24,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 08:12:24,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234974652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:12:24,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294039522] [2022-12-14 08:12:24,697 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:12:24,697 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:24,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:24,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:24,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:12:24,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:12:24,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:24,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:12:24,992 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:12:24,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:12:25,011 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:12:25,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:12:25,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:25,087 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:25,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:25,149 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:25,200 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 08:12:25,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 08:12:25,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:25,234 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:12:25,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:12:25,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:25,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:25,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:25,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:25,428 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-12-14 08:12:25,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2022-12-14 08:12:25,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:12:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:25,532 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:12:25,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 76 [2022-12-14 08:12:25,592 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:25,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:25,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:25,739 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:12:25,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-12-14 08:12:25,849 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:25,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:26,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:26,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:26,374 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:12:26,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 180 [2022-12-14 08:12:26,485 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:12:26,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:12:26,585 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:12:26,602 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:12:26,603 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:12:34,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5062#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:12:34,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:34,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:12:34,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-14 08:12:34,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699402010] [2022-12-14 08:12:34,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:34,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 08:12:34,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:34,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 08:12:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 08:12:34,881 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:12:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:35,055 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-12-14 08:12:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:12:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-12-14 08:12:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:35,055 INFO L225 Difference]: With dead ends: 57 [2022-12-14 08:12:35,055 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 08:12:35,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 08:12:35,056 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:35,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 147 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:12:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 08:12:35,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 08:12:35,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-12-14 08:12:35,081 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 40 [2022-12-14 08:12:35,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:35,081 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-12-14 08:12:35,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:12:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-12-14 08:12:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 08:12:35,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:35,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:35,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 08:12:35,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 08:12:35,284 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1251303248, now seen corresponding path program 4 times [2022-12-14 08:12:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:35,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165853935] [2022-12-14 08:12:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:35,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:35,410 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 08:12:35,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:35,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165853935] [2022-12-14 08:12:35,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165853935] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:35,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418986837] [2022-12-14 08:12:35,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:12:35,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:35,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:35,412 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:35,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 08:12:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:35,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:12:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 08:12:35,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 08:12:35,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418986837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:12:35,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [108958780] [2022-12-14 08:12:35,582 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:12:35,582 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:35,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:35,583 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:35,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:12:35,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:35,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:12:35,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:12:35,897 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:12:35,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:12:35,922 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:12:35,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:12:36,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:36,013 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:36,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:36,098 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:36,156 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 08:12:36,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 08:12:36,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:36,200 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:12:36,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:12:36,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:36,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:36,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:36,418 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-12-14 08:12:36,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 56 [2022-12-14 08:12:36,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:12:36,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:36,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:36,538 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:12:36,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 76 [2022-12-14 08:12:36,615 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:36,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:36,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:36,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:36,761 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:12:36,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-12-14 08:12:36,876 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:36,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:37,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:37,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:37,436 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-12-14 08:12:37,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 166 [2022-12-14 08:12:37,545 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:12:37,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:12:37,641 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:12:37,660 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:12:37,661 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:12:41,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5524#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:12:41,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:41,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:12:41,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 9 [2022-12-14 08:12:41,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81593305] [2022-12-14 08:12:41,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:41,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:12:41,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:12:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-12-14 08:12:41,765 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:12:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:41,917 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-12-14 08:12:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:12:41,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-12-14 08:12:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:41,919 INFO L225 Difference]: With dead ends: 58 [2022-12-14 08:12:41,919 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 08:12:41,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:12:41,920 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:41,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 107 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:12:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 08:12:41,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-12-14 08:12:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-12-14 08:12:41,948 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 44 [2022-12-14 08:12:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:41,948 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-12-14 08:12:41,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:12:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-12-14 08:12:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 08:12:41,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:41,949 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:41,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 08:12:42,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:42,150 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:42,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:42,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1841884544, now seen corresponding path program 5 times [2022-12-14 08:12:42,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:42,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481855768] [2022-12-14 08:12:42,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:42,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 08:12:42,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:42,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481855768] [2022-12-14 08:12:42,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481855768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:42,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528050414] [2022-12-14 08:12:42,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:12:42,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:42,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:42,405 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:42,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 08:12:42,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:12:42,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:12:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:12:42,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 08:12:42,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 08:12:43,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528050414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:12:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500046322] [2022-12-14 08:12:43,057 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:12:43,057 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:43,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:43,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:43,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:12:43,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:43,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:12:43,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:12:43,320 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:12:43,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:12:43,341 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:12:43,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:12:43,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:43,431 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:43,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:43,491 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:43,550 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-12-14 08:12:43,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-12-14 08:12:43,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:43,589 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:12:43,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:12:43,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:43,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 08:12:43,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:43,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:43,788 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-12-14 08:12:43,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2022-12-14 08:12:43,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:12:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:43,880 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-12-14 08:12:43,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 64 [2022-12-14 08:12:43,937 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:12:43,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:12:44,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:44,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:44,074 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-12-14 08:12:44,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 178 [2022-12-14 08:12:44,174 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:12:44,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:12:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:44,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:44,761 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-12-14 08:12:44,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 166 [2022-12-14 08:12:44,858 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:44,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:44,937 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:12:44,959 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:12:44,960 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:12:49,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6016#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:12:49,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:49,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:12:49,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 27 [2022-12-14 08:12:49,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784501647] [2022-12-14 08:12:49,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:49,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 08:12:49,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:49,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 08:12:49,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 08:12:49,439 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 08:12:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:50,132 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2022-12-14 08:12:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 08:12:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-12-14 08:12:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:50,133 INFO L225 Difference]: With dead ends: 104 [2022-12-14 08:12:50,133 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 08:12:50,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=364, Invalid=3176, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 08:12:50,135 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:50,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 259 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:12:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 08:12:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2022-12-14 08:12:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-12-14 08:12:50,186 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 46 [2022-12-14 08:12:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:50,187 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-12-14 08:12:50,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 08:12:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-12-14 08:12:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 08:12:50,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:50,187 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:50,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 08:12:50,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 08:12:50,389 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -458579056, now seen corresponding path program 6 times [2022-12-14 08:12:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:50,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013598299] [2022-12-14 08:12:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:50,595 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 08:12:50,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:50,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013598299] [2022-12-14 08:12:50,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013598299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:50,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969375741] [2022-12-14 08:12:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:12:50,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:50,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:50,596 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:50,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 08:12:50,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:12:50,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:12:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:12:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:12:50,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 08:12:50,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969375741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:12:50,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756515957] [2022-12-14 08:12:50,919 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:12:50,919 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:50,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:50,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:50,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:12:51,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:12:51,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:51,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:12:51,354 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:12:51,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:12:51,375 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:12:51,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:12:51,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:51,458 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:51,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:51,540 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:51,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 08:12:51,622 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:12:51,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 232 [2022-12-14 08:12:51,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:51,683 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:12:51,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:12:51,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:51,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:51,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:51,774 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:51,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:51,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:51,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:51,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:12:51,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:51,945 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:12:51,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 78 [2022-12-14 08:12:52,024 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:12:52,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:12:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:52,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:52,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 31 [2022-12-14 08:12:52,189 INFO L321 Elim1Store]: treesize reduction 108, result has 41.0 percent of original size [2022-12-14 08:12:52,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 153 [2022-12-14 08:12:52,280 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:52,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:52,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:52,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:52,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 31 [2022-12-14 08:12:52,635 INFO L321 Elim1Store]: treesize reduction 108, result has 41.0 percent of original size [2022-12-14 08:12:52,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 149 [2022-12-14 08:12:52,747 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:52,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:52,854 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:12:52,875 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:12:52,876 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:12:56,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6604#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:12:56,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:12:56,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:12:56,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-12-14 08:12:56,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216162072] [2022-12-14 08:12:56,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:12:56,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:12:56,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:12:56,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:12:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 08:12:56,357 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:12:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:56,641 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-12-14 08:12:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:12:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-12-14 08:12:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:56,642 INFO L225 Difference]: With dead ends: 59 [2022-12-14 08:12:56,642 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 08:12:56,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 108 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 08:12:56,643 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:56,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 157 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:12:56,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 08:12:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2022-12-14 08:12:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:12:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-12-14 08:12:56,696 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 47 [2022-12-14 08:12:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:56,696 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-12-14 08:12:56,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:12:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-12-14 08:12:56,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 08:12:56,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:56,697 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:56,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 08:12:56,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:12:56,898 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:12:56,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:56,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1305280003, now seen corresponding path program 7 times [2022-12-14 08:12:56,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:12:56,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617949685] [2022-12-14 08:12:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:56,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:12:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 08:12:57,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:12:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617949685] [2022-12-14 08:12:57,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617949685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:12:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924489987] [2022-12-14 08:12:57,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:12:57,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:12:57,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:12:57,168 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:12:57,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 08:12:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:57,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:12:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:12:57,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:12:57,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924489987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:12:57,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308425294] [2022-12-14 08:12:57,444 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:12:57,444 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:12:57,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:12:57,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:12:57,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:12:57,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:12:57,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:12:57,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:12:57,790 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:12:57,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:12:57,812 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:12:57,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:12:57,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:57,875 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:57,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:12:57,954 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:12:57,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-14 08:12:58,036 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-12-14 08:12:58,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 235 treesize of output 232 [2022-12-14 08:12:58,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:58,080 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:12:58,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:12:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:58,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-14 08:12:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:58,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:58,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:58,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:58,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:12:58,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:12:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:58,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:58,320 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-12-14 08:12:58,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 64 [2022-12-14 08:12:58,385 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:58,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:58,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:58,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 29 [2022-12-14 08:12:58,555 INFO L321 Elim1Store]: treesize reduction 90, result has 45.5 percent of original size [2022-12-14 08:12:58,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 149 [2022-12-14 08:12:58,654 INFO L321 Elim1Store]: treesize reduction 21, result has 61.1 percent of original size [2022-12-14 08:12:58,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 47 [2022-12-14 08:12:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:58,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:58,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 29 [2022-12-14 08:12:58,999 INFO L321 Elim1Store]: treesize reduction 90, result has 45.5 percent of original size [2022-12-14 08:12:58,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 149 [2022-12-14 08:12:59,082 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:12:59,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:12:59,171 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:12:59,189 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:12:59,189 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:13:02,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7112#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:13:02,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:13:02,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:13:02,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 21 [2022-12-14 08:13:02,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858568347] [2022-12-14 08:13:02,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:13:02,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:13:02,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:13:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:13:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 08:13:02,721 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:13:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:13:03,019 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2022-12-14 08:13:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:13:03,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2022-12-14 08:13:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:13:03,021 INFO L225 Difference]: With dead ends: 83 [2022-12-14 08:13:03,021 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 08:13:03,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 108 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=258, Invalid=2094, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 08:13:03,021 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:13:03,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 164 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:13:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 08:13:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2022-12-14 08:13:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 08:13:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2022-12-14 08:13:03,082 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 48 [2022-12-14 08:13:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:13:03,082 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2022-12-14 08:13:03,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 08:13:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2022-12-14 08:13:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 08:13:03,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:13:03,082 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:13:03,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 08:13:03,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 08:13:03,284 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:13:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:13:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash 705103376, now seen corresponding path program 8 times [2022-12-14 08:13:03,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:13:03,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085592083] [2022-12-14 08:13:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:13:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:13:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:13:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 08:13:03,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:13:03,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085592083] [2022-12-14 08:13:03,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085592083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:13:03,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536926685] [2022-12-14 08:13:03,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:13:03,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:13:03,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:13:03,701 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:13:03,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 08:13:04,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:13:04,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:13:04,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:13:04,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:13:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:13:04,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:13:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 08:13:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536926685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:13:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973986053] [2022-12-14 08:13:04,650 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:13:04,650 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:13:04,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:13:04,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:13:04,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:13:04,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:13:04,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 08:13:04,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-14 08:13:04,909 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-14 08:13:04,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-12-14 08:13:04,931 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 08:13:04,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 130 [2022-12-14 08:13:05,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:13:05,030 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:13:05,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-12-14 08:13:05,107 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:13:05,158 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-12-14 08:13:05,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-12-14 08:13:05,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:13:05,194 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:13:05,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:13:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:05,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:13:05,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:05,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-12-14 08:13:05,380 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-12-14 08:13:05,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 44 [2022-12-14 08:13:05,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:13:05,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:05,490 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-12-14 08:13:05,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 64 [2022-12-14 08:13:05,550 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:13:05,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:13:05,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:05,761 INFO L321 Elim1Store]: treesize reduction 23, result has 58.9 percent of original size [2022-12-14 08:13:05,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 169 treesize of output 166 [2022-12-14 08:13:05,851 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:13:05,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:13:06,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:06,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:06,224 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-12-14 08:13:06,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 175 treesize of output 180 [2022-12-14 08:13:06,314 INFO L321 Elim1Store]: treesize reduction 27, result has 62.5 percent of original size [2022-12-14 08:13:06,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2022-12-14 08:13:06,411 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-12-14 08:13:06,431 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-12-14 08:13:06,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:13:14,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7698#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= |ULTIMATE.start_check_~n#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-12-14 08:13:14,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:13:14,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:13:14,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-12-14 08:13:14,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470559686] [2022-12-14 08:13:14,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:13:14,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 08:13:14,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:13:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 08:13:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 08:13:14,897 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 28 states, 25 states have (on average 1.96) internal successors, (49), 28 states have internal predecessors, (49), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 08:13:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:13:16,495 INFO L93 Difference]: Finished difference Result 243 states and 339 transitions. [2022-12-14 08:13:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 08:13:16,495 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.96) internal successors, (49), 28 states have internal predecessors, (49), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 49 [2022-12-14 08:13:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:13:16,496 INFO L225 Difference]: With dead ends: 243 [2022-12-14 08:13:16,496 INFO L226 Difference]: Without dead ends: 207 [2022-12-14 08:13:16,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 08:13:16,497 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 232 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:13:16,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 432 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:13:16,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-14 08:13:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 77. [2022-12-14 08:13:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 64 states have (on average 1.3125) internal successors, (84), 64 states have internal predecessors, (84), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 08:13:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2022-12-14 08:13:16,563 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 49 [2022-12-14 08:13:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:13:16,563 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2022-12-14 08:13:16,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.96) internal successors, (49), 28 states have internal predecessors, (49), 6 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2022-12-14 08:13:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2022-12-14 08:13:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 08:13:16,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:13:16,564 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:13:16,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 08:13:16,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:13:16,765 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:13:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:13:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1214687543, now seen corresponding path program 9 times [2022-12-14 08:13:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:13:16,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641312355] [2022-12-14 08:13:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:13:16,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:13:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:13:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:13:21,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:13:21,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641312355] [2022-12-14 08:13:21,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641312355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:13:21,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275435938] [2022-12-14 08:13:21,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:13:21,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:13:21,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:13:21,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:13:21,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_568e23de-3405-4051-a61d-d15acbdeef9f/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 08:13:21,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:13:21,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:13:21,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 175 conjunts are in the unsatisfiable core [2022-12-14 08:13:21,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:13:21,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:13:21,888 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:13:21,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 08:13:22,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 08:13:22,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 08:13:22,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-12-14 08:13:22,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:13:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:22,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 39 [2022-12-14 08:13:22,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:22,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 51 [2022-12-14 08:13:22,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:22,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:22,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-12-14 08:13:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,018 INFO L321 Elim1Store]: treesize reduction 38, result has 49.3 percent of original size [2022-12-14 08:13:23,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 63 [2022-12-14 08:13:23,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:13:23,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 67 [2022-12-14 08:13:23,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:13:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:13:23,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 51 [2022-12-14 08:13:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:13:23,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:13:23,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2022-12-14 08:13:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:13:24,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:13:43,834 INFO L321 Elim1Store]: treesize reduction 383, result has 41.3 percent of original size [2022-12-14 08:13:43,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 706654456234 treesize of output 359988939446