./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS --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 ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e --- 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-8393723 [2022-11-19 08:12:29,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:12:29,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:12:29,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:12:29,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:12:29,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:12:29,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:12:29,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:12:29,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:12:29,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:12:29,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:12:29,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:12:29,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:12:29,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:12:29,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:12:29,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:12:29,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:12:29,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:12:29,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:12:29,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:12:29,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:12:29,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:12:29,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:12:29,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:12:29,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:12:29,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:12:29,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:12:29,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:12:29,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:12:29,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:12:29,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:12:29,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:12:29,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:12:29,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:12:29,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:12:29,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:12:29,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:12:29,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:12:29,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:12:29,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:12:29,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:12:29,852 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:12:29,891 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:12:29,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:12:29,901 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:12:29,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:12:29,902 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:12:29,902 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:12:29,902 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:12:29,902 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:12:29,903 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:12:29,903 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:12:29,904 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:12:29,904 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:12:29,904 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:12:29,904 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:12:29,905 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:12:29,905 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:12:29,905 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:12:29,905 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:12:29,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:12:29,906 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:12:29,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:12:29,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:12:29,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:12:29,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:12:29,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:12:29,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:12:29,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:12:29,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:12:29,910 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:12:29,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:12:29,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:12:29,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:12:29,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:29,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:12:29,911 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:12:29,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:12:29,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:12:29,912 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:12:29,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:12:29,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:12:29,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:12:29,912 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_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca2dcd06e0389cf665904adfee9ccd6a1a268c87541d3b3b3e0bcffb3a75664e [2022-11-19 08:12:30,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:12:30,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:12:30,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:12:30,207 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:12:30,207 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:12:30,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-crafted/zero_sum4.c [2022-11-19 08:12:30,292 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/data/48b28cb93/0b495aa4729f4e57a31c707fa1d58983/FLAGb6953b1a4 [2022-11-19 08:12:30,715 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:12:30,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/sv-benchmarks/c/array-crafted/zero_sum4.c [2022-11-19 08:12:30,722 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/data/48b28cb93/0b495aa4729f4e57a31c707fa1d58983/FLAGb6953b1a4 [2022-11-19 08:12:31,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/data/48b28cb93/0b495aa4729f4e57a31c707fa1d58983 [2022-11-19 08:12:31,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:12:31,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:12:31,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:31,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:12:31,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:12:31,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22b959d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31, skipping insertion in model container [2022-11-19 08:12:31,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:12:31,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:12:31,348 WARN L234 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_69386ee7-3ee2-4062-87c4-dbde32e4c70d/sv-benchmarks/c/array-crafted/zero_sum4.c[400,413] [2022-11-19 08:12:31,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:31,377 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:12:31,388 WARN L234 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_69386ee7-3ee2-4062-87c4-dbde32e4c70d/sv-benchmarks/c/array-crafted/zero_sum4.c[400,413] [2022-11-19 08:12:31,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:31,411 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:12:31,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31 WrapperNode [2022-11-19 08:12:31,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:31,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:31,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:12:31,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:12:31,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,453 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2022-11-19 08:12:31,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:31,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:12:31,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:12:31,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:12:31,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,481 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:12:31,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:12:31,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:12:31,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:12:31,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (1/1) ... [2022-11-19 08:12:31,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:31,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:31,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:12:31,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:12:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:12:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:12:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:12:31,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:12:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:12:31,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:12:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:12:31,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:12:31,684 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:12:31,686 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:12:31,920 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:12:32,018 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:12:32,020 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-19 08:12:32,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:32 BoogieIcfgContainer [2022-11-19 08:12:32,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:12:32,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:12:32,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:12:32,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:12:32,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:12:31" (1/3) ... [2022-11-19 08:12:32,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189772c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:32, skipping insertion in model container [2022-11-19 08:12:32,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:31" (2/3) ... [2022-11-19 08:12:32,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189772c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:32, skipping insertion in model container [2022-11-19 08:12:32,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:32" (3/3) ... [2022-11-19 08:12:32,065 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2022-11-19 08:12:32,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:12:32,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:12:32,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:12:32,151 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;@6bc44ffe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:12:32,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:12:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:12:32,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:32,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:32,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:32,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:32,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1453537585, now seen corresponding path program 1 times [2022-11-19 08:12:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:32,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826154182] [2022-11-19 08:12:32,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:32,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:32,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826154182] [2022-11-19 08:12:32,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826154182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:32,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:32,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:12:32,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966238183] [2022-11-19 08:12:32,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:12:32,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:32,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:12:32,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:32,618 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:32,727 INFO L93 Difference]: Finished difference Result 32 states and 51 transitions. [2022-11-19 08:12:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:12:32,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-19 08:12:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:32,738 INFO L225 Difference]: With dead ends: 32 [2022-11-19 08:12:32,740 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 08:12:32,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:12:32,756 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:32,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 08:12:32,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 08:12:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2022-11-19 08:12:32,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 13 [2022-11-19 08:12:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:32,796 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2022-11-19 08:12:32,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2022-11-19 08:12:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:12:32,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:32,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:32,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:12:32,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:32,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1839481755, now seen corresponding path program 1 times [2022-11-19 08:12:32,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:32,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794239967] [2022-11-19 08:12:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:32,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:12:32,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794239967] [2022-11-19 08:12:32,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794239967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:12:32,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:12:32,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:12:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615215126] [2022-11-19 08:12:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:12:32,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:12:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:12:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:12:32,928 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:32,996 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2022-11-19 08:12:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:12:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:32,999 INFO L225 Difference]: With dead ends: 33 [2022-11-19 08:12:32,999 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 08:12:33,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:12:33,002 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:33,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 5 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 08:12:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-19 08:12:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-11-19 08:12:33,009 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2022-11-19 08:12:33,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:33,009 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-11-19 08:12:33,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:33,010 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-11-19 08:12:33,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:12:33,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:33,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:33,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:12:33,015 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:33,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1144628674, now seen corresponding path program 1 times [2022-11-19 08:12:33,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:33,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916670737] [2022-11-19 08:12:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:33,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:12:33,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916670737] [2022-11-19 08:12:33,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916670737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:33,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059343367] [2022-11-19 08:12:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:33,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:33,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:33,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:12:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:12:33,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:12:33,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:12:33,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059343367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522422284] [2022-11-19 08:12:33,497 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:12:33,497 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:33,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:33,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:33,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:33,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:33,640 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:12:33,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:12:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:33,702 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:33,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:33,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:12:33,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:33,951 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:12:33,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 232 [2022-11-19 08:12:34,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:12:34,477 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:34,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:34,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:34,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:34,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 08:12:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417447465] [2022-11-19 08:12:34,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:34,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:12:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:34,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:12:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:12:34,767 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:34,841 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2022-11-19 08:12:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:12:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-19 08:12:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:34,842 INFO L225 Difference]: With dead ends: 43 [2022-11-19 08:12:34,842 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 08:12:34,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:12:34,844 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:34,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 08:12:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-19 08:12:34,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-19 08:12:34,850 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 22 [2022-11-19 08:12:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:34,851 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-19 08:12:34,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-19 08:12:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:12:34,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:34,852 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:34,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:35,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:35,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash 88512748, now seen corresponding path program 2 times [2022-11-19 08:12:35,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:35,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075860827] [2022-11-19 08:12:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:35,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:12:35,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:35,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075860827] [2022-11-19 08:12:35,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075860827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:35,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295813809] [2022-11-19 08:12:35,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:35,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:35,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:35,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:12:35,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:12:35,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:35,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:12:35,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:12:35,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:12:35,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295813809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:35,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1953757504] [2022-11-19 08:12:35,347 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:12:35,347 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:35,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:35,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:35,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:35,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:35,410 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:12:35,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:12:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:35,459 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:35,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:35,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:12:35,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:35,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:35,590 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:12:35,591 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 234 treesize of output 233 [2022-11-19 08:12:35,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:12:36,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:36,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:36,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:36,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:36,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-19 08:12:36,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800266601] [2022-11-19 08:12:36,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:36,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:12:36,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:12:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:36,303 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:36,390 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2022-11-19 08:12:36,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:12:36,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-19 08:12:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:36,391 INFO L225 Difference]: With dead ends: 49 [2022-11-19 08:12:36,392 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 08:12:36,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:12:36,393 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:36,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 5 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 08:12:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-19 08:12:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-19 08:12:36,400 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 23 [2022-11-19 08:12:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:36,400 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-19 08:12:36,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-19 08:12:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 08:12:36,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:36,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:36,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:36,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:36,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:36,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:36,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1125282897, now seen corresponding path program 3 times [2022-11-19 08:12:36,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:36,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493922694] [2022-11-19 08:12:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:36,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:39,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493922694] [2022-11-19 08:12:39,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493922694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:39,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875718421] [2022-11-19 08:12:39,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:39,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:39,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:39,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:12:39,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:39,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:39,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-19 08:12:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:39,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:12:40,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:40,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:12:40,504 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 15 treesize of output 9 [2022-11-19 08:12:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:40,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:12:40,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875718421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1509498559] [2022-11-19 08:12:40,827 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:12:40,827 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:40,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:40,828 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:40,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:40,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:40,876 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:12:40,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:12:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:40,918 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:40,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:40,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:40,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:12:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:41,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:41,033 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:12:41,034 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 234 treesize of output 233 [2022-11-19 08:12:41,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:12:41,422 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:41,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '954#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:41,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:41,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:41,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 18 [2022-11-19 08:12:41,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741360754] [2022-11-19 08:12:41,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:41,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:12:41,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:12:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:12:41,900 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:42,292 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-11-19 08:12:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:12:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-19 08:12:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:42,294 INFO L225 Difference]: With dead ends: 57 [2022-11-19 08:12:42,294 INFO L226 Difference]: Without dead ends: 54 [2022-11-19 08:12:42,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 40 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:12:42,295 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:42,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:12:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-19 08:12:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-11-19 08:12:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-19 08:12:42,306 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 31 [2022-11-19 08:12:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:42,307 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-19 08:12:42,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-19 08:12:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:12:42,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:42,308 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:42,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:42,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:42,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:42,516 INFO L85 PathProgramCache]: Analyzing trace with hash -76458201, now seen corresponding path program 4 times [2022-11-19 08:12:42,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:42,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532727984] [2022-11-19 08:12:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:42,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:12:42,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:42,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532727984] [2022-11-19 08:12:42,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532727984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:42,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815685605] [2022-11-19 08:12:42,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:42,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:42,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:42,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:42,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:12:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:42,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:12:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:12:42,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:12:42,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815685605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:42,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216329774] [2022-11-19 08:12:42,859 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:12:42,859 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:42,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:42,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:42,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:42,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:42,908 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:42,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:42,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:42,921 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 26 treesize of output 34 [2022-11-19 08:12:42,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:42,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:12:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:43,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:43,027 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:12:43,028 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 234 treesize of output 233 [2022-11-19 08:12:43,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:12:43,331 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:43,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1366#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:43,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:43,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:43,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-19 08:12:43,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125524813] [2022-11-19 08:12:43,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:43,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:12:43,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:12:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:12:43,614 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:43,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:43,842 INFO L93 Difference]: Finished difference Result 102 states and 132 transitions. [2022-11-19 08:12:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:12:43,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-19 08:12:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:43,843 INFO L225 Difference]: With dead ends: 102 [2022-11-19 08:12:43,843 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 08:12:43,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:12:43,844 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:43,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 9 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 08:12:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-19 08:12:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-19 08:12:43,854 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 32 [2022-11-19 08:12:43,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:43,855 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-19 08:12:43,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-19 08:12:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:12:43,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:43,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:43,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:44,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:12:44,062 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:44,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1622138321, now seen corresponding path program 5 times [2022-11-19 08:12:44,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:44,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987939144] [2022-11-19 08:12:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:44,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:12:44,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:44,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987939144] [2022-11-19 08:12:44,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987939144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:44,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159765073] [2022-11-19 08:12:44,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:44,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:44,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:44,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:44,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:12:44,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:12:44,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:44,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:12:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:12:44,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 08:12:44,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159765073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:44,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624356486] [2022-11-19 08:12:44,404 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:12:44,404 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:44,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:44,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:44,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:44,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:44,459 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:12:44,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:12:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:44,500 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:44,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:44,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:12:44,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:44,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:44,601 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:12:44,601 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 234 treesize of output 233 [2022-11-19 08:12:44,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:12:44,903 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:45,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1880#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:45,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:45,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:45,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-19 08:12:45,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601599282] [2022-11-19 08:12:45,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:45,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:12:45,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:45,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:12:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:12:45,237 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:45,436 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2022-11-19 08:12:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:12:45,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-19 08:12:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:45,437 INFO L225 Difference]: With dead ends: 82 [2022-11-19 08:12:45,437 INFO L226 Difference]: Without dead ends: 41 [2022-11-19 08:12:45,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:12:45,439 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 107 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:45,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 11 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:12:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-19 08:12:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-19 08:12:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-19 08:12:45,456 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-11-19 08:12:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:45,457 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-19 08:12:45,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-19 08:12:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:12:45,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:45,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:45,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:45,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:45,666 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:45,666 INFO L85 PathProgramCache]: Analyzing trace with hash -231017630, now seen corresponding path program 6 times [2022-11-19 08:12:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:45,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715817311] [2022-11-19 08:12:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:45,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:50,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:50,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715817311] [2022-11-19 08:12:50,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715817311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:50,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181253883] [2022-11-19 08:12:50,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:12:50,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:50,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:50,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:50,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:12:50,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:12:50,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:50,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-19 08:12:50,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:50,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:12:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:12:51,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:12:52,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181253883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:52,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240549522] [2022-11-19 08:12:52,415 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:12:52,415 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:52,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:52,416 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:52,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:52,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:52,458 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:12:52,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:12:52,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:52,499 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:52,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:52,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:12:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:52,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:12:52,624 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:12:52,625 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 234 treesize of output 233 [2022-11-19 08:12:52,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:12:52,920 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:54,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2404#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:54,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:54,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:54,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 15, 11] total 44 [2022-11-19 08:12:54,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617340418] [2022-11-19 08:12:54,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:54,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 08:12:54,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 08:12:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 08:12:54,140 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:57,307 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2022-11-19 08:12:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 08:12:57,308 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-19 08:12:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:57,310 INFO L225 Difference]: With dead ends: 112 [2022-11-19 08:12:57,310 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 08:12:57,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 73 SyntacticMatches, 37 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=464, Invalid=4648, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 08:12:57,313 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:57,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 96 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 08:12:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 08:12:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2022-11-19 08:12:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2696629213483146) internal successors, (113), 89 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2022-11-19 08:12:57,352 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 40 [2022-11-19 08:12:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:57,353 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2022-11-19 08:12:57,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 44 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2022-11-19 08:12:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:12:57,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:57,354 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:57,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:57,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 08:12:57,555 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:57,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1059651906, now seen corresponding path program 7 times [2022-11-19 08:12:57,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:57,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049662456] [2022-11-19 08:12:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:57,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 08:12:57,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049662456] [2022-11-19 08:12:57,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049662456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042433836] [2022-11-19 08:12:57,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:12:57,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:57,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:57,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:12:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:57,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:12:57,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:12:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 08:12:57,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:12:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 08:12:57,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042433836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:12:57,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967382094] [2022-11-19 08:12:57,985 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:12:57,985 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:12:57,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:12:57,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:12:57,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:12:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:58,029 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:12:58,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:12:58,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:58,041 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 26 treesize of output 34 [2022-11-19 08:12:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:58,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:12:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:12:58,155 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:12:58,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 232 [2022-11-19 08:12:58,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:12:58,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:59,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3100#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:59,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:59,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:59,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-19 08:12:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491586878] [2022-11-19 08:12:59,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 08:12:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 08:12:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-11-19 08:12:59,067 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:59,332 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2022-11-19 08:12:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:12:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-19 08:12:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:59,333 INFO L225 Difference]: With dead ends: 190 [2022-11-19 08:12:59,333 INFO L226 Difference]: Without dead ends: 86 [2022-11-19 08:12:59,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 28 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:12:59,335 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:59,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:12:59,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-19 08:12:59,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-19 08:12:59,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 85 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2022-11-19 08:12:59,355 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 41 [2022-11-19 08:12:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:59,355 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2022-11-19 08:12:59,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:12:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2022-11-19 08:12:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 08:12:59,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:59,357 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:59,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:59,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:59,562 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:59,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:59,562 INFO L85 PathProgramCache]: Analyzing trace with hash 190076756, now seen corresponding path program 8 times [2022-11-19 08:12:59,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:59,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144520533] [2022-11-19 08:12:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:59,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:12:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:12:59,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:12:59,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144520533] [2022-11-19 08:12:59,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144520533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:12:59,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956902523] [2022-11-19 08:12:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:12:59,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:59,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:12:59,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:12:59,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:12:59,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:12:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:12:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:13:00,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 08:13:00,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956902523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:00,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694000104] [2022-11-19 08:13:00,138 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:13:00,138 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:00,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:00,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:00,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:00,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:00,185 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:13:00,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:13:00,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:00,229 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:00,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:00,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:13:00,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:00,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:00,333 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:13:00,334 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 234 treesize of output 233 [2022-11-19 08:13:00,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:13:00,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:01,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3918#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:01,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:01,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:01,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-19 08:13:01,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259202433] [2022-11-19 08:13:01,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:01,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:13:01,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:13:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:13:01,209 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:01,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:01,530 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-11-19 08:13:01,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:13:01,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-19 08:13:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:01,531 INFO L225 Difference]: With dead ends: 121 [2022-11-19 08:13:01,531 INFO L226 Difference]: Without dead ends: 50 [2022-11-19 08:13:01,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 93 SyntacticMatches, 24 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:13:01,533 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:01,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 15 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:13:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-19 08:13:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-19 08:13:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-11-19 08:13:01,541 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2022-11-19 08:13:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:01,541 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-11-19 08:13:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-11-19 08:13:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:13:01,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:01,543 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:01,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:01,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:13:01,749 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash 775002255, now seen corresponding path program 9 times [2022-11-19 08:13:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:01,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359070062] [2022-11-19 08:13:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:01,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:08,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359070062] [2022-11-19 08:13:08,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359070062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733693288] [2022-11-19 08:13:08,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:13:08,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:08,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:08,840 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:08,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:13:08,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:13:08,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:08,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-19 08:13:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:09,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:13:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:10,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:13:11,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733693288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:11,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195053268] [2022-11-19 08:13:11,992 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:13:11,993 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:11,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:11,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:11,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:12,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:12,034 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:13:12,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:13:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:12,079 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:12,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:12,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:12,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:13:12,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:12,188 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:13:12,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 232 [2022-11-19 08:13:12,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:13:12,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:14,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4613#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:14,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:14,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:14,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 18, 13] total 56 [2022-11-19 08:13:14,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008732373] [2022-11-19 08:13:14,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:14,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-19 08:13:14,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:14,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-19 08:13:14,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3451, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 08:13:14,529 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 56 states, 56 states have (on average 2.3214285714285716) internal successors, (130), 56 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:21,476 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2022-11-19 08:13:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 08:13:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.3214285714285716) internal successors, (130), 56 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-19 08:13:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:21,478 INFO L225 Difference]: With dead ends: 112 [2022-11-19 08:13:21,478 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 08:13:21,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 94 SyntacticMatches, 40 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=525, Invalid=6785, Unknown=0, NotChecked=0, Total=7310 [2022-11-19 08:13:21,480 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 91 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:21,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 61 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-19 08:13:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 08:13:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 51. [2022-11-19 08:13:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:21,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-11-19 08:13:21,507 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 49 [2022-11-19 08:13:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:21,508 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-11-19 08:13:21,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.3214285714285716) internal successors, (130), 56 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:21,508 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-11-19 08:13:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 08:13:21,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:21,509 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:21,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:21,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:21,715 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1745466079, now seen corresponding path program 10 times [2022-11-19 08:13:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:21,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553313703] [2022-11-19 08:13:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:21,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-19 08:13:21,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:21,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553313703] [2022-11-19 08:13:21,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553313703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:21,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151610154] [2022-11-19 08:13:21,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:13:21,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:21,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:21,939 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:21,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:13:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:13:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-19 08:13:22,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-19 08:13:22,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151610154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:22,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417250215] [2022-11-19 08:13:22,355 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:13:22,355 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:22,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:22,355 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:22,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:22,396 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:13:22,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:13:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:22,442 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:22,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:22,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:13:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:22,550 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:13:22,551 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 234 treesize of output 233 [2022-11-19 08:13:22,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:13:22,804 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:23,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5292#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:23,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:23,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:23,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-19 08:13:23,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271725034] [2022-11-19 08:13:23,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:23,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:13:23,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:13:23,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:13:23,158 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:23,456 INFO L93 Difference]: Finished difference Result 132 states and 155 transitions. [2022-11-19 08:13:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:13:23,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-19 08:13:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:23,457 INFO L225 Difference]: With dead ends: 132 [2022-11-19 08:13:23,457 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 08:13:23,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 123 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:13:23,458 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:23,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 9 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:13:23,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 08:13:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-19 08:13:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-19 08:13:23,486 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 50 [2022-11-19 08:13:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:23,487 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-19 08:13:23,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-19 08:13:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 08:13:23,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:23,488 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:23,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:23,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:13:23,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 738475339, now seen corresponding path program 11 times [2022-11-19 08:13:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:23,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510692615] [2022-11-19 08:13:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:23,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-19 08:13:23,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510692615] [2022-11-19 08:13:23,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510692615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:23,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176643454] [2022-11-19 08:13:23,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:13:23,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:23,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:23,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:23,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:13:24,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:13:24,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:13:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-19 08:13:24,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-19 08:13:24,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176643454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:24,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100087753] [2022-11-19 08:13:24,293 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:13:24,294 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:24,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:24,294 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:24,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:24,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:24,342 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:24,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:24,353 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 26 treesize of output 34 [2022-11-19 08:13:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:24,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:13:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:24,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:24,456 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:13:24,456 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 234 treesize of output 233 [2022-11-19 08:13:24,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:13:24,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:25,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5982#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:25,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:25,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:25,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-19 08:13:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779295408] [2022-11-19 08:13:25,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:25,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:13:25,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:25,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:13:25,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:13:25,396 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:25,649 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-11-19 08:13:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:13:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-19 08:13:25,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:25,651 INFO L225 Difference]: With dead ends: 98 [2022-11-19 08:13:25,651 INFO L226 Difference]: Without dead ends: 59 [2022-11-19 08:13:25,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 105 SyntacticMatches, 36 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:13:25,652 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 201 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:25,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 11 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:13:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-19 08:13:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-19 08:13:25,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-11-19 08:13:25,688 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 51 [2022-11-19 08:13:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:25,689 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-11-19 08:13:25,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:25,689 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-11-19 08:13:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 08:13:25,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:25,690 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:25,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:25,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:13:25,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash 7452930, now seen corresponding path program 12 times [2022-11-19 08:13:25,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:25,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918843095] [2022-11-19 08:13:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:25,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 4 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:35,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918843095] [2022-11-19 08:13:35,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918843095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693314247] [2022-11-19 08:13:35,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:13:35,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:35,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:35,860 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:35,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:13:36,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:13:36,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:13:36,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 182 conjunts are in the unsatisfiable core [2022-11-19 08:13:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:36,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:13:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:13:39,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:13:41,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693314247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:41,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512826685] [2022-11-19 08:13:41,101 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:13:41,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:41,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:41,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:41,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:41,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:41,149 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:41,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:41,164 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 26 treesize of output 34 [2022-11-19 08:13:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:41,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:13:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:41,260 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:13:41,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 232 [2022-11-19 08:13:41,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:13:41,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:45,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6711#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:45,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:45,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:45,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 21, 15] total 69 [2022-11-19 08:13:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085657487] [2022-11-19 08:13:45,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:45,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-19 08:13:45,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-19 08:13:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=5132, Unknown=0, NotChecked=0, Total=5402 [2022-11-19 08:13:45,414 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 69 states, 69 states have (on average 2.246376811594203) internal successors, (155), 69 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:55,849 INFO L93 Difference]: Finished difference Result 225 states and 266 transitions. [2022-11-19 08:13:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-19 08:13:55,850 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.246376811594203) internal successors, (155), 69 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-19 08:13:55,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:55,851 INFO L225 Difference]: With dead ends: 225 [2022-11-19 08:13:55,851 INFO L226 Difference]: Without dead ends: 156 [2022-11-19 08:13:55,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 102 SyntacticMatches, 55 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5394 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1031, Invalid=12541, Unknown=0, NotChecked=0, Total=13572 [2022-11-19 08:13:55,856 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:55,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 133 Invalid, 3947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 3004 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-19 08:13:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-19 08:13:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 124. [2022-11-19 08:13:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 123 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2022-11-19 08:13:55,914 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 58 [2022-11-19 08:13:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:55,914 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2022-11-19 08:13:55,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.246376811594203) internal successors, (155), 69 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2022-11-19 08:13:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 08:13:55,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:55,916 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:55,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:56,122 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:56,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:56,122 INFO L85 PathProgramCache]: Analyzing trace with hash -794807180, now seen corresponding path program 13 times [2022-11-19 08:13:56,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:56,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147236103] [2022-11-19 08:13:56,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:56,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-19 08:13:56,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:13:56,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147236103] [2022-11-19 08:13:56,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147236103] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:56,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205744421] [2022-11-19 08:13:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:13:56,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:13:56,413 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:13:56,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:13:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:56,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:13:56,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-19 08:13:56,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:13:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-19 08:13:56,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205744421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:13:56,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579209373] [2022-11-19 08:13:56,863 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:13:56,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:56,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:56,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:56,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:56,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:56,918 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:13:56,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:13:56,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:56,932 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 26 treesize of output 34 [2022-11-19 08:13:56,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:56,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:13:57,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:57,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:57,042 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:13:57,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 232 [2022-11-19 08:13:57,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:13:57,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:13:57,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7858#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:13:57,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:13:57,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:13:57,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-19 08:13:57,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379154892] [2022-11-19 08:13:57,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:13:57,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:13:57,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:13:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:13:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:13:57,959 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:58,265 INFO L93 Difference]: Finished difference Result 171 states and 205 transitions. [2022-11-19 08:13:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:13:58,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-11-19 08:13:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:58,267 INFO L225 Difference]: With dead ends: 171 [2022-11-19 08:13:58,267 INFO L226 Difference]: Without dead ends: 68 [2022-11-19 08:13:58,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 131 SyntacticMatches, 36 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:13:58,268 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 359 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:58,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 13 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:13:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-19 08:13:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-19 08:13:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-11-19 08:13:58,302 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 60 [2022-11-19 08:13:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:58,302 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-11-19 08:13:58,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:13:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-11-19 08:13:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:13:58,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:58,303 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:58,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:58,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 08:13:58,504 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:13:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1806888303, now seen corresponding path program 14 times [2022-11-19 08:13:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:13:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899702070] [2022-11-19 08:13:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:58,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:13:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 9 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:11,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:14:11,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899702070] [2022-11-19 08:14:11,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899702070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:11,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646682472] [2022-11-19 08:14:11,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:14:11,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:11,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:11,902 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:11,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:14:12,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:14:12,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:12,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 218 conjunts are in the unsatisfiable core [2022-11-19 08:14:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:24,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:24,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:24,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:24,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:14:24,085 INFO L321 Elim1Store]: treesize reduction 20, result has 77.8 percent of original size [2022-11-19 08:14:24,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 97 treesize of output 90 [2022-11-19 08:14:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 168 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 08:14:24,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:36,644 INFO L321 Elim1Store]: treesize reduction 206, result has 57.3 percent of original size [2022-11-19 08:14:36,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 102 treesize of output 293 [2022-11-19 08:14:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:14:38,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646682472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:38,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357399215] [2022-11-19 08:14:38,040 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:14:38,040 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:14:38,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:14:38,041 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:14:38,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:14:38,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,094 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:14:38,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:14:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,108 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 26 treesize of output 34 [2022-11-19 08:14:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:14:38,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:38,190 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:14:38,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 232 [2022-11-19 08:14:38,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:14:38,409 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:14:44,504 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8863#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:14:44,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:14:44,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:44,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 37, 40] total 125 [2022-11-19 08:14:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096586994] [2022-11-19 08:14:44,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:44,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-11-19 08:14:44,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:14:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-11-19 08:14:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=15755, Unknown=1, NotChecked=0, Total=16770 [2022-11-19 08:14:44,510 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 125 states, 125 states have (on average 1.512) internal successors, (189), 125 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:09,308 INFO L93 Difference]: Finished difference Result 200 states and 231 transitions. [2022-11-19 08:15:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-19 08:15:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.512) internal successors, (189), 125 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-19 08:15:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:09,315 INFO L225 Difference]: With dead ends: 200 [2022-11-19 08:15:09,316 INFO L226 Difference]: Without dead ends: 185 [2022-11-19 08:15:09,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 92 SyntacticMatches, 50 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 15188 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=2390, Invalid=37809, Unknown=1, NotChecked=0, Total=40200 [2022-11-19 08:15:09,321 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 4210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2323 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:09,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 111 Invalid, 4210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1553 Invalid, 0 Unknown, 2323 Unchecked, 2.0s Time] [2022-11-19 08:15:09,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-19 08:15:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2022-11-19 08:15:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1543624161073827) internal successors, (172), 149 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2022-11-19 08:15:09,430 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 67 [2022-11-19 08:15:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:09,430 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2022-11-19 08:15:09,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.512) internal successors, (189), 125 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2022-11-19 08:15:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 08:15:09,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:09,432 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:09,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:09,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:15:09,632 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:09,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1375294233, now seen corresponding path program 15 times [2022-11-19 08:15:09,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:09,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640272173] [2022-11-19 08:15:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:09,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 08:15:09,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:09,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640272173] [2022-11-19 08:15:09,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640272173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:09,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359055910] [2022-11-19 08:15:09,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:15:09,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:09,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:09,988 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:10,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:15:10,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:15:10,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:10,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:15:10,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 08:15:10,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-19 08:15:10,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359055910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:10,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294315884] [2022-11-19 08:15:10,554 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:15:10,554 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:10,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:10,555 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:10,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:15:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:10,597 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:15:10,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:15:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:10,609 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 26 treesize of output 34 [2022-11-19 08:15:10,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:10,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:15:10,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:10,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:15:10,692 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:15:10,693 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 234 treesize of output 233 [2022-11-19 08:15:10,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:15:10,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:15:11,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10133#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:15:11,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:15:11,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:11,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-11-19 08:15:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830595489] [2022-11-19 08:15:11,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:11,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 08:15:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 08:15:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 08:15:11,975 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:13,090 INFO L93 Difference]: Finished difference Result 329 states and 378 transitions. [2022-11-19 08:15:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 08:15:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-19 08:15:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:13,091 INFO L225 Difference]: With dead ends: 329 [2022-11-19 08:15:13,091 INFO L226 Difference]: Without dead ends: 125 [2022-11-19 08:15:13,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 142 SyntacticMatches, 42 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 08:15:13,092 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:13,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:15:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-19 08:15:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2022-11-19 08:15:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 117 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2022-11-19 08:15:13,169 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 68 [2022-11-19 08:15:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:13,169 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2022-11-19 08:15:13,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2022-11-19 08:15:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-19 08:15:13,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:13,171 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:13,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:13,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:15:13,378 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:13,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2013094678, now seen corresponding path program 16 times [2022-11-19 08:15:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:13,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609728115] [2022-11-19 08:15:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:13,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-19 08:15:13,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:13,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609728115] [2022-11-19 08:15:13,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609728115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:13,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238011881] [2022-11-19 08:15:13,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:15:13,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:13,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:13,706 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:13,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:15:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:15:13,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-19 08:15:14,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-19 08:15:14,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238011881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:14,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510433363] [2022-11-19 08:15:14,159 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:15:14,159 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:15:14,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:15:14,160 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:15:14,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:15:14,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:14,203 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:15:14,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:15:14,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:14,253 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:15:14,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:15:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:14,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:15:14,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:14,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:15:14,345 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:15:14,346 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 234 treesize of output 233 [2022-11-19 08:15:14,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:15:14,601 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:15:15,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11475#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:15:15,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:15:15,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:15,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-19 08:15:15,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225004525] [2022-11-19 08:15:15,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:15,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:15:15,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:15:15,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:15:15,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:15:15,019 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:15,470 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2022-11-19 08:15:15,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:15:15,470 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-19 08:15:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:15,471 INFO L225 Difference]: With dead ends: 122 [2022-11-19 08:15:15,471 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 08:15:15,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 172 SyntacticMatches, 21 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:15:15,472 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 323 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:15,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 17 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:15:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 08:15:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-19 08:15:15,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2022-11-19 08:15:15,519 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 69 [2022-11-19 08:15:15,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:15,519 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2022-11-19 08:15:15,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:15,519 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2022-11-19 08:15:15,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 08:15:15,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:15,520 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:15,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:15,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:15:15,721 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:15:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1853093538, now seen corresponding path program 17 times [2022-11-19 08:15:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:15:15,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366067972] [2022-11-19 08:15:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:15:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 33 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:32,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366067972] [2022-11-19 08:15:32,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366067972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952546279] [2022-11-19 08:15:32,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:32,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:32,118 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:32,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:15:32,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:15:32,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:32,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 261 conjunts are in the unsatisfiable core [2022-11-19 08:15:32,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:32,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:15:38,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:38,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:38,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:38,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:15:38,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 89 [2022-11-19 08:15:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:38,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:47,169 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 104 treesize of output 92 [2022-11-19 08:15:47,259 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-19 08:15:47,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3022 treesize of output 1754 [2022-11-19 08:16:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 08:16:30,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952546279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:30,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149846076] [2022-11-19 08:16:30,109 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:16:30,109 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:16:30,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:16:30,111 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:16:30,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:16:30,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:30,170 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:16:30,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:16:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:30,216 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:16:30,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:16:30,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:30,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:16:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:30,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:30,306 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:16:30,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 232 [2022-11-19 08:16:30,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:16:30,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:16:37,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12431#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:16:37,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:16:37,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:16:37,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 28, 21] total 100 [2022-11-19 08:16:37,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719644408] [2022-11-19 08:16:37,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:37,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-19 08:16:37,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:16:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-19 08:16:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=728, Invalid=10192, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 08:16:37,957 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 100 states, 100 states have (on average 2.14) internal successors, (214), 100 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:56,153 INFO L93 Difference]: Finished difference Result 249 states and 285 transitions. [2022-11-19 08:16:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-19 08:16:56,154 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.14) internal successors, (214), 100 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-19 08:16:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:56,155 INFO L225 Difference]: With dead ends: 249 [2022-11-19 08:16:56,155 INFO L226 Difference]: Without dead ends: 244 [2022-11-19 08:16:56,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 121 SyntacticMatches, 78 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13945 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=1988, Invalid=26404, Unknown=0, NotChecked=0, Total=28392 [2022-11-19 08:16:56,157 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 2969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1285 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:56,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 97 Invalid, 2969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1370 Invalid, 0 Unknown, 1285 Unchecked, 1.7s Time] [2022-11-19 08:16:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-19 08:16:56,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2022-11-19 08:16:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1470588235294117) internal successors, (195), 170 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:56,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 195 transitions. [2022-11-19 08:16:56,301 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 195 transitions. Word has length 76 [2022-11-19 08:16:56,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:56,301 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 195 transitions. [2022-11-19 08:16:56,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.14) internal successors, (214), 100 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:56,301 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 195 transitions. [2022-11-19 08:16:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-19 08:16:56,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:56,302 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:56,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:56,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:56,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:16:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:56,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1896257615, now seen corresponding path program 18 times [2022-11-19 08:16:56,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:16:56,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976062124] [2022-11-19 08:16:56,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:56,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:16:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-19 08:16:56,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:16:56,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976062124] [2022-11-19 08:16:56,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976062124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:16:56,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315171136] [2022-11-19 08:16:56,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:16:56,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:16:56,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:16:56,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:16:56,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:16:56,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:16:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:16:56,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-19 08:16:57,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-19 08:16:57,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315171136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760930058] [2022-11-19 08:16:57,573 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:16:57,573 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:16:57,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:16:57,574 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:16:57,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:16:57,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:57,615 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:16:57,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:16:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:57,625 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 26 treesize of output 34 [2022-11-19 08:16:57,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:57,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 08:16:57,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:57,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:16:57,711 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 08:16:57,711 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 234 treesize of output 233 [2022-11-19 08:16:57,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:16:57,946 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:16:59,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13882#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:16:59,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:16:59,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:16:59,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2022-11-19 08:16:59,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489827359] [2022-11-19 08:16:59,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:59,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 08:16:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:16:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 08:16:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 08:16:59,191 INFO L87 Difference]: Start difference. First operand 171 states and 195 transitions. Second operand has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:00,493 INFO L93 Difference]: Finished difference Result 341 states and 388 transitions. [2022-11-19 08:17:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 08:17:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-19 08:17:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:00,495 INFO L225 Difference]: With dead ends: 341 [2022-11-19 08:17:00,495 INFO L226 Difference]: Without dead ends: 124 [2022-11-19 08:17:00,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 169 SyntacticMatches, 40 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=546, Invalid=2646, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 08:17:00,496 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 103 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:00,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 19 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:17:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-19 08:17:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2022-11-19 08:17:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.1120689655172413) internal successors, (129), 116 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2022-11-19 08:17:00,571 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 77 [2022-11-19 08:17:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:00,571 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2022-11-19 08:17:00,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 36 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2022-11-19 08:17:00,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 08:17:00,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:00,572 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:00,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:00,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:00,778 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:17:00,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1749061588, now seen corresponding path program 19 times [2022-11-19 08:17:00,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:00,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721138959] [2022-11-19 08:17:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:00,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 08:17:01,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:01,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721138959] [2022-11-19 08:17:01,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721138959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:17:01,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576671688] [2022-11-19 08:17:01,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:17:01,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:01,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:17:01,066 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:17:01,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:17:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:17:01,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 08:17:01,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 08:17:01,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576671688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:17:01,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065225080] [2022-11-19 08:17:01,614 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 08:17:01,614 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:17:01,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:17:01,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:17:01,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:17:01,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:01,658 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-19 08:17:01,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-19 08:17:01,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:01,710 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-19 08:17:01,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 08:17:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:01,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:17:01,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:01,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:01,785 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 08:17:01,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 232 [2022-11-19 08:17:01,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:17:01,994 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:17:02,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15319#(and (<= ~SIZE~0 32767) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:17:02,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:17:02,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:17:02,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-19 08:17:02,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550615730] [2022-11-19 08:17:02,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:17:02,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 08:17:02,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:17:02,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 08:17:02,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:17:02,868 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:03,289 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2022-11-19 08:17:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 08:17:03,289 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-19 08:17:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:03,290 INFO L225 Difference]: With dead ends: 121 [2022-11-19 08:17:03,290 INFO L226 Difference]: Without dead ends: 86 [2022-11-19 08:17:03,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 184 SyntacticMatches, 41 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:17:03,291 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 269 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:03,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 13 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:17:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-19 08:17:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-19 08:17:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-11-19 08:17:03,347 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 80 [2022-11-19 08:17:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:03,348 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-11-19 08:17:03,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-11-19 08:17:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-19 08:17:03,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:03,348 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:03,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:03,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:03,549 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:17:03,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:03,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1518045775, now seen corresponding path program 20 times [2022-11-19 08:17:03,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:17:03,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677239083] [2022-11-19 08:17:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:03,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:17:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 22 proven. 302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:17:21,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:17:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677239083] [2022-11-19 08:17:21,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677239083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:17:21,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575024720] [2022-11-19 08:17:21,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:17:21,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:21,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:17:21,182 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:17:21,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69386ee7-3ee2-4062-87c4-dbde32e4c70d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 08:17:21,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:17:21,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:17:21,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 286 conjunts are in the unsatisfiable core [2022-11-19 08:17:21,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:21,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:17:40,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:40,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:40,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:17:40,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 97 treesize of output 89 [2022-11-19 08:17:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 8 proven. 288 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 08:17:40,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:18:01,346 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 196 treesize of output 172 [2022-11-19 08:18:07,115 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 224 DAG size of output: 31 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 08:18:07,116 INFO L321 Elim1Store]: treesize reduction 594, result has 5.9 percent of original size [2022-11-19 08:18:07,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 280068 treesize of output 132648 [2022-11-19 08:20:48,182 WARN L718 sPolynomialRelations]: Constructing 262144(two to the power of 18 dual juncts. [2022-11-19 08:22:02,177 WARN L718 sPolynomialRelations]: Constructing 4194304(two to the power of 22 dual juncts. [2022-11-19 08:22:02,260 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:02,421 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:02,512 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:02,619 WARN L718 sPolynomialRelations]: Constructing 4194304(two to the power of 22 dual juncts. [2022-11-19 08:22:02,693 WARN L718 sPolynomialRelations]: Constructing 2097152(two to the power of 21 dual juncts. [2022-11-19 08:22:02,941 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:03,008 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:03,076 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:03,198 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:03,272 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:03,345 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:03,649 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:03,739 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:03,913 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:03,991 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:04,157 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:04,249 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:04,397 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:04,565 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:05,017 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:05,114 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:05,453 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:05,537 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:05,647 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:05,728 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:05,862 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:05,956 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:06,063 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:06,157 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:06,269 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:06,362 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:06,708 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:06,847 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:06,951 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:07,103 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:07,237 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:07,373 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:07,598 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:07,757 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:07,945 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:08,103 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:08,269 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:08,560 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:08,838 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:09,006 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:09,254 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:09,421 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:09,810 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:10,061 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:10,410 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:10,571 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:10,774 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:11,047 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:11,236 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:11,395 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:11,544 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:11,676 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:11,856 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:11,988 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:12,279 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:12,569 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:12,822 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:12,989 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:13,240 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:13,486 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:13,803 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:13,970 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:14,237 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:14,567 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:14,832 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:14,972 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:15,075 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:15,244 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:15,376 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:15,510 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:15,718 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:15,871 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:16,005 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:16,180 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:16,297 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:16,481 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:16,591 WARN L718 sPolynomialRelations]: Constructing 4194304(two to the power of 22 dual juncts. [2022-11-19 08:22:16,688 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:16,751 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:16,881 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:16,946 WARN L718 sPolynomialRelations]: Constructing 4194304(two to the power of 22 dual juncts. [2022-11-19 08:22:17,065 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:17,142 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:17,259 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:17,355 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:17,689 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:17,784 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:17,884 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:18,010 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:18,083 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:18,159 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:18,309 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:18,421 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:18,620 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:18,721 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:18,935 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:19,099 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:19,276 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:19,377 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:19,516 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:19,616 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:19,942 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:20,082 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:20,372 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:20,532 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:20,803 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:20,938 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:21,223 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:21,397 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:21,725 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:21,869 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:22,277 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:22,488 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:22,610 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:22,771 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:22,970 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:23,134 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:23,458 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:23,806 WARN L718 sPolynomialRelations]: Constructing 268435456(two to the power of 28 dual juncts. [2022-11-19 08:22:24,262 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:24,604 WARN L718 sPolynomialRelations]: Constructing 268435456(two to the power of 28 dual juncts. [2022-11-19 08:22:25,079 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:25,423 WARN L718 sPolynomialRelations]: Constructing 268435456(two to the power of 28 dual juncts. [2022-11-19 08:22:25,891 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:26,247 WARN L718 sPolynomialRelations]: Constructing 268435456(two to the power of 28 dual juncts. [2022-11-19 08:22:26,704 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:27,079 WARN L718 sPolynomialRelations]: Constructing 268435456(two to the power of 28 dual juncts. [2022-11-19 08:22:27,562 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:27,851 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:28,177 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:28,340 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:28,575 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:28,861 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:29,245 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:29,407 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:29,644 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:29,882 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:30,309 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:30,538 WARN L718 sPolynomialRelations]: Constructing 268435456(two to the power of 28 dual juncts. [2022-11-19 08:22:31,131 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:31,448 WARN L718 sPolynomialRelations]: Constructing 268435456(two to the power of 28 dual juncts. [2022-11-19 08:22:32,383 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:32,735 WARN L718 sPolynomialRelations]: Constructing 268435456(two to the power of 28 dual juncts. [2022-11-19 08:22:33,247 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:33,408 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:33,845 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:34,076 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:34,310 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:34,471 WARN L718 sPolynomialRelations]: Constructing 134217728(two to the power of 27 dual juncts. [2022-11-19 08:22:34,717 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:34,869 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:35,096 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:35,256 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:35,453 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:35,614 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:35,837 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:35,910 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:35,985 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:36,121 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:36,271 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:36,394 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:36,551 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:36,725 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:36,889 WARN L718 sPolynomialRelations]: Constructing 67108864(two to the power of 26 dual juncts. [2022-11-19 08:22:37,106 WARN L718 sPolynomialRelations]: Constructing 4194304(two to the power of 22 dual juncts. [2022-11-19 08:22:37,234 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:37,489 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:37,618 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:37,753 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:37,860 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:37,933 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:38,123 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:38,255 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:38,386 WARN L718 sPolynomialRelations]: Constructing 33554432(two to the power of 25 dual juncts. [2022-11-19 08:22:38,548 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:38,621 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:38,695 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:38,826 WARN L718 sPolynomialRelations]: Constructing 4194304(two to the power of 22 dual juncts. [2022-11-19 08:22:38,922 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:38,987 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:39,116 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:39,222 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:39,331 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:39,494 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:39,633 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:39,739 WARN L718 sPolynomialRelations]: Constructing 16777216(two to the power of 24 dual juncts. [2022-11-19 08:22:39,881 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:39,981 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:40,041 WARN L718 sPolynomialRelations]: Constructing 8388608(two to the power of 23 dual juncts. [2022-11-19 08:22:40,106 WARN L718 sPolynomialRelations]: Constructing 2097152(two to the power of 21 dual juncts. [2022-11-19 08:22:40,217 WARN L718 sPolynomialRelations]: Constructing 1048576(two to the power of 20 dual juncts.